{"id":8522,"date":"2026-03-04T09:30:00","date_gmt":"2026-03-04T08:30:00","guid":{"rendered":"https:\/\/tps-elektronik.com\/?p=8522"},"modified":"2026-03-11T08:13:58","modified_gmt":"2026-03-11T07:13:58","slug":"fsp400-50ucb-400w-1u-industrial-atx-power-supply","status":"publish","type":"post","link":"https:\/\/tps-elektronik.com\/en\/fsp400-50ucb-400w-1u-industrial-atx-power-supply\/","title":{"rendered":"FSP400-50UCB 400W 1U Industrial ATX Power Supply: Low Ripple, Wide Input 90\u2013264Vac &#038; Compliance-Ready for IPC, Storage and Automation"},"content":{"rendered":"<article class=\"product-blog\" lang=\"en\"><header>\n<p>In industrial systems such as <strong>IPC controllers, compact workstations, storage appliances, and communication equipment<\/strong>, the power supply is more than a basic component.<\/p>\n<p>Electrical noise, start-up behavior, and compliance documentation can influence system stability and project approval timelines. Ripple can affect sensitive I\/O electronics, insufficient hold-up time may lead to resets, and missing documentation can delay certification or customer audits.<\/p>\n<p>The <a href=\"https:\/\/www.shop-tps.com\/en\/shop\/fsp400-50ucb-19376#attr=\" target=\"_blank\" rel=\"noopener noreferrer nofollow\"><strong>FSP400-50UCB<\/strong><\/a> is designed for integration in <strong>1U rack systems and industrial environments<\/strong> where space constraints, predictable electrical behavior, and documentation availability are relevant for system development and deployment.<\/p>\n<\/header><header>\n<figure class=\"hero\"><img decoding=\"async\" src=\"https:\/\/www.shop-tps.com\/web\/image\/product.template\/19376\/image_1920?unique=38d0522\" alt=\"FSP400-50UCB 400W 1U industrial ATX switching power supply (front view with C14 inlet and fan)\" \/><\/figure>\n<nav class=\"toc\" aria-label=\"Table of Contents\">\n<h2 id=\"toc\">Table of Contents<\/h2>\n<ul>\n<li><a href=\"#why-400w-1u\">Why a 400W 1U power supply matters in industrial systems<\/a><\/li>\n<li><a href=\"#fsp400-overview\">FSP400-50UCB overview<\/a><\/li>\n<li><a href=\"#outputs-rails\">Output rails and cross-load behavior<\/a><\/li>\n<li><a href=\"#input-efficiency\">Input range, efficiency and inrush considerations<\/a><\/li>\n<li><a href=\"#reliability-environment\">Environmental and reliability parameters<\/a><\/li>\n<li><a href=\"#compliance-docs\">Compliance and documentation<\/a><\/li>\n<li><a href=\"#integration-notes\">Integration notes for system integrators and panel builders<\/a><\/li>\n<li><a href=\"#mechanical-airflow\">Mechanical fit, airflow and 1U thermal behavior<\/a><\/li>\n<li><a href=\"#harness-connectors\">Harness, connectors, labeling and serviceability<\/a><\/li>\n<li><a href=\"#signals-remote\">PS_ON#, +5VSB and Power-Good for controlled start-up<\/a><\/li>\n<li><a href=\"#emi-grounding\">EMI and grounding checklist for low-noise deployments<\/a><\/li>\n<li><a href=\"#rfq-checklist\">RFQ checklist<\/a><\/li>\n<li><a href=\"#applications\">Typical application scenarios<\/a><\/li>\n<li><a href=\"#alternatives\">Alternative TPS power solutions<\/a><\/li>\n<li><a href=\"#buy-from-tps\">How to source the product<\/a><\/li>\n<li><a href=\"#faq\">FAQ<\/a><\/li>\n<\/ul>\n<\/nav>\n<p><!-- Generated image required (1\/5) --><\/p>\n<\/header>\n<section>\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8530\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/02\/2.1_ATX-PC-Power-Supply_FSP400-50UCB.jpg\" alt=\"Illustration: 1U industrial rack system with a 400W switching power supply powering IPC and I\/O cards, clean airflow arrows\" width=\"1920\" height=\"1060\" \/><\/figure>\n<h1 data-section-id=\"edppys\" data-start=\"2764\" data-end=\"2822\">Why a 400W 1U Power Supply Matters in Industrial Systems<\/h1>\n<p data-start=\"2824\" data-end=\"2938\">In many industrial platforms, the power budget is only one design constraint. System engineers must also consider:<\/p>\n<ul data-start=\"2940\" data-end=\"3188\">\n<li data-section-id=\"8ic9vy\" data-start=\"2940\" data-end=\"2997\">\n<p data-start=\"2942\" data-end=\"2997\">Limited mechanical space (1U height restrictions)<\/p>\n<\/li>\n<li data-section-id=\"1ydfyyp\" data-start=\"2998\" data-end=\"3050\">\n<p data-start=\"3000\" data-end=\"3050\">Thermal management within dense rack systems<\/p>\n<\/li>\n<li data-section-id=\"1w6iehy\" data-start=\"3051\" data-end=\"3099\">\n<p data-start=\"3053\" data-end=\"3099\">Electrical noise and transient behaviour<\/p>\n<\/li>\n<li data-section-id=\"1xsp1p3\" data-start=\"3100\" data-end=\"3188\">\n<p data-start=\"3102\" data-end=\"3188\">Compliance documentation required for customer audits or certification processes<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3190\" data-end=\"3421\">While desktop power supplies may be sufficient for prototypes, production systems typically require predictable behaviour under cross-load conditions, defined start-up signalling, and traceable compliance documentation.<\/p>\n<p data-start=\"3423\" data-end=\"3478\">The FSP400-50UCB addresses these requirements with:<\/p>\n<ul data-start=\"3480\" data-end=\"3653\">\n<li data-section-id=\"78lmaz\" data-start=\"3480\" data-end=\"3520\">\n<p data-start=\"3482\" data-end=\"3520\">Standard 1U industrial form factor<\/p>\n<\/li>\n<li data-section-id=\"1qjb0xj\" data-start=\"3521\" data-end=\"3557\">\n<p data-start=\"3523\" data-end=\"3557\">Total output power up to 400 W<\/p>\n<\/li>\n<li data-section-id=\"19eqi04\" data-start=\"3558\" data-end=\"3614\">\n<p data-start=\"3560\" data-end=\"3614\">Multiple output rails used in industrial ATX platforms<\/p>\n<\/li>\n<li data-section-id=\"1ysgsv7\" data-start=\"3615\" data-end=\"3653\">\n<p data-start=\"3617\" data-end=\"3653\">Wide AC input range (90\u2013264 Vac)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3655\" data-end=\"3794\">The datasheet positions the unit for applications including industrial PCs, workstations, storage systems, and communication platforms.<\/p>\n<\/section>\n<section>\n<h2 id=\"fsp400-overview\">FSP400-50UCB Overview<\/h2>\n<p data-start=\"3826\" data-end=\"3859\">Typical electrical rails include:<\/p>\n<ul data-start=\"3861\" data-end=\"3954\">\n<li data-section-id=\"1m5x2s6\" data-start=\"3861\" data-end=\"3872\">\n<p data-start=\"3863\" data-end=\"3872\"><strong data-start=\"3863\" data-end=\"3872\">+12 V<\/strong><\/p>\n<\/li>\n<li data-section-id=\"ndlbts\" data-start=\"3873\" data-end=\"3883\">\n<p data-start=\"3875\" data-end=\"3883\"><strong data-start=\"3875\" data-end=\"3883\">+5 V<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1eac96j\" data-start=\"3884\" data-end=\"3896\">\n<p data-start=\"3886\" data-end=\"3896\"><strong data-start=\"3886\" data-end=\"3896\">+3.3 V<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1az338u\" data-start=\"3897\" data-end=\"3908\">\n<p data-start=\"3899\" data-end=\"3908\"><strong data-start=\"3899\" data-end=\"3908\">\u201312 V<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1q0bkb4\" data-start=\"3909\" data-end=\"3934\">\n<p data-start=\"3911\" data-end=\"3934\"><strong data-start=\"3911\" data-end=\"3934\">+5 VSB standby rail<\/strong><\/p>\n<\/li>\n<li data-section-id=\"zz43km\" data-start=\"3935\" data-end=\"3954\">\n<p data-start=\"3937\" data-end=\"3954\">optional <strong data-start=\"3946\" data-end=\"3954\">\u20135 V<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3956\" data-end=\"4092\">These rails support many <strong data-start=\"3981\" data-end=\"4046\">ATX-based industrial motherboard and backplane configurations<\/strong> used in IPC and embedded workstation systems.<\/p>\n<p data-start=\"4094\" data-end=\"4256\">The specification also includes <strong data-start=\"4126\" data-end=\"4185\">operating limits such as temperature range and altitude<\/strong>, which are relevant when deploying systems in industrial environments.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8534\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/02\/3.1_ATX-PC-Power-Supply_FSP400-50UCB.jpg\" alt=\"Infographic: FSP400-50UCB output rails (+12V, +5V, +3.3V, -12V, +5VSB, optional -5V) with current ratings and 90W combined limit for +3.3V and +5V\" width=\"1920\" height=\"1157\" \/><\/p>\n<p><!-- Generated image required (2\/5) --><\/p>\n<h2>Key Electrical Characteristics<\/h2>\n<h3 data-section-id=\"1f0nteg\" data-start=\"4297\" data-end=\"4337\">Output Rails and Cross-Load Behaviour<\/h3>\n<p data-start=\"4339\" data-end=\"4492\">In industrial computing systems, the distribution of power between rails can influence stability and compatibility with backplanes or legacy peripherals.<\/p>\n<p data-start=\"4494\" data-end=\"4537\">Typical integration considerations include:<\/p>\n<ul data-start=\"4539\" data-end=\"4843\">\n<li data-section-id=\"1orsrhn\" data-start=\"4539\" data-end=\"4608\">\n<p data-start=\"4541\" data-end=\"4608\"><strong data-start=\"4541\" data-end=\"4556\">+12 V rail:<\/strong> primary supply for CPUs, drives, and PCIe devices<\/p>\n<\/li>\n<li data-section-id=\"1jbpiix\" data-start=\"4609\" data-end=\"4694\">\n<p data-start=\"4611\" data-end=\"4694\"><strong data-start=\"4611\" data-end=\"4637\">+5 V and +3.3 V rails:<\/strong> often used by legacy I\/O and certain controller boards<\/p>\n<\/li>\n<li data-section-id=\"h39264\" data-start=\"4695\" data-end=\"4766\">\n<p data-start=\"4697\" data-end=\"4766\"><strong data-start=\"4697\" data-end=\"4708\">+5 VSB:<\/strong> supports standby functionality and remote power control<\/p>\n<\/li>\n<li data-section-id=\"dqpjh1\" data-start=\"4767\" data-end=\"4843\">\n<p data-start=\"4769\" data-end=\"4843\"><strong data-start=\"4769\" data-end=\"4795\">\u201312 V \/ optional \u20135 V:<\/strong> used in some specialised or legacy interfaces<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4845\" data-end=\"5019\">The datasheet specifies that the <strong data-start=\"4878\" data-end=\"4934\">combined +3.3 V and +5 V output must not exceed 90 W<\/strong>.<br data-start=\"4935\" data-end=\"4938\" \/>System designers should verify cross-load conditions during early design reviews.<\/p>\n<h3 data-section-id=\"1we1x4x\" data-start=\"5026\" data-end=\"5077\">Input Range, Efficiency and Inrush Considerations<\/h3>\n<p data-start=\"5079\" data-end=\"5247\">Industrial installations frequently operate in environments with varying mains conditions, including mixed <strong data-start=\"5186\" data-end=\"5246\">115 V \/ 230 V regions or generator-backed infrastructure<\/strong>.<\/p>\n<p data-start=\"5249\" data-end=\"5275\">The FSP400-50UCB supports:<\/p>\n<ul data-start=\"5277\" data-end=\"5408\">\n<li data-section-id=\"3t08f9\" data-start=\"5277\" data-end=\"5308\">\n<p data-start=\"5279\" data-end=\"5308\"><strong data-start=\"5279\" data-end=\"5295\">Input range:<\/strong> 90\u2013264 Vac<\/p>\n<\/li>\n<li data-section-id=\"8tff4h\" data-start=\"5309\" data-end=\"5336\">\n<p data-start=\"5311\" data-end=\"5336\"><strong data-start=\"5311\" data-end=\"5325\">Frequency:<\/strong> 47\u201363 Hz<\/p>\n<\/li>\n<li data-section-id=\"fqb4vk\" data-start=\"5337\" data-end=\"5408\">\n<p data-start=\"5339\" data-end=\"5408\"><strong data-start=\"5339\" data-end=\"5354\">Efficiency:<\/strong> certified according to the <strong data-start=\"5382\" data-end=\"5400\">80 PLUS Bronze<\/strong> program<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5410\" data-end=\"5503\">The specification also includes <strong data-start=\"5442\" data-end=\"5465\">inrush current data<\/strong>, which may be relevant when planning:<\/p>\n<ul data-start=\"5505\" data-end=\"5590\">\n<li data-section-id=\"cpv0ur\" data-start=\"5505\" data-end=\"5531\">\n<p data-start=\"5507\" data-end=\"5531\">circuit breaker sizing<\/p>\n<\/li>\n<li data-section-id=\"b9jfn0\" data-start=\"5532\" data-end=\"5561\">\n<p data-start=\"5534\" data-end=\"5561\">staged start-up sequences<\/p>\n<\/li>\n<li data-section-id=\"iu6cx7\" data-start=\"5562\" data-end=\"5590\">\n<p data-start=\"5564\" data-end=\"5590\">multi-PSU rack deployments<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5592\" data-end=\"5740\">In systems with several power supplies connected to a shared PDU, <strong data-start=\"5658\" data-end=\"5682\">PS_ON# control logic<\/strong> can help stagger start-up and reduce peak inrush current.<\/p>\n<h2 data-section-id=\"78l4gv\" data-start=\"5747\" data-end=\"5789\">Environmental and Reliability Parameters<\/h2>\n<p data-start=\"5791\" data-end=\"5875\">The datasheet lists operating conditions typically relevant to industrial equipment.<\/p>\n<p data-start=\"5877\" data-end=\"5894\">Examples include:<\/p>\n<ul data-start=\"5896\" data-end=\"6038\">\n<li data-section-id=\"xo63l9\" data-start=\"5896\" data-end=\"5940\">\n<p data-start=\"5898\" data-end=\"5940\"><strong data-start=\"5898\" data-end=\"5924\">Operating temperature:<\/strong> 0 \u00b0C to 50 \u00b0C<\/p>\n<\/li>\n<li data-section-id=\"1runkfp\" data-start=\"5941\" data-end=\"5998\">\n<p data-start=\"5943\" data-end=\"5998\"><strong data-start=\"5943\" data-end=\"5956\">Humidity:<\/strong> high relative humidity (non-condensing)<\/p>\n<\/li>\n<li data-section-id=\"1ai2xm8\" data-start=\"5999\" data-end=\"6038\">\n<p data-start=\"6001\" data-end=\"6038\"><strong data-start=\"6001\" data-end=\"6022\">Maximum altitude:<\/strong> up to 5,000 m<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6040\" data-end=\"6137\">The specification also lists an <strong data-start=\"6072\" data-end=\"6136\">MTBF of 100,000 hours at 25 \u00b0C under maximum load conditions<\/strong>.<\/p>\n<p data-start=\"6139\" data-end=\"6331\">Manufacturing documentation indicates that units undergo <strong data-start=\"6196\" data-end=\"6252\">high-voltage (Hi-pot) testing and burn-in procedures<\/strong>, which may be relevant for internal quality documentation or audit narratives.<\/p>\n<h2 data-section-id=\"1b1h2ua\" data-start=\"6338\" data-end=\"6368\">Compliance and Documentation<\/h2>\n<p data-start=\"6370\" data-end=\"6514\">For projects involving regulated markets or customer certification processes, documentation availability can be an important procurement factor.<\/p>\n<p data-start=\"6516\" data-end=\"6553\">The product documentation references:<\/p>\n<ul data-start=\"6555\" data-end=\"6712\">\n<li data-section-id=\"d9qjcn\" data-start=\"6555\" data-end=\"6620\">\n<p data-start=\"6557\" data-end=\"6620\"><strong data-start=\"6557\" data-end=\"6618\">CB certification (IEC 62368-1 and IEC 60950-1 frameworks)<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1cvpi6m\" data-start=\"6621\" data-end=\"6645\">\n<p data-start=\"6623\" data-end=\"6645\"><strong data-start=\"6623\" data-end=\"6643\">RoHS declaration<\/strong><\/p>\n<\/li>\n<li data-section-id=\"39acim\" data-start=\"6646\" data-end=\"6678\">\n<p data-start=\"6648\" data-end=\"6678\"><strong data-start=\"6648\" data-end=\"6676\">CE-related documentation<\/strong><\/p>\n<\/li>\n<li data-section-id=\"13kz60r\" data-start=\"6679\" data-end=\"6712\">\n<p data-start=\"6681\" data-end=\"6712\"><strong data-start=\"6681\" data-end=\"6712\">UL documentation references<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6714\" data-end=\"6835\">Mechanical drawings and electrical specifications are also available for integration into project documentation packages.<\/p>\n<h2 data-section-id=\"190v9md\" data-start=\"6842\" data-end=\"6891\">Integration Considerations for System Designers<\/h2>\n<h3 data-section-id=\"1u74ryu\" data-start=\"6893\" data-end=\"6922\">Mechanical Fit and Airflow<\/h3>\n<p data-start=\"6924\" data-end=\"7024\">1U power supplies operate in <strong data-start=\"6953\" data-end=\"6985\">thermally dense environments<\/strong> where airflow management is essential.<\/p>\n<p data-start=\"7026\" data-end=\"7072\">The FSP400-50UCB dimensions are approximately:<\/p>\n<p data-start=\"7074\" data-end=\"7097\"><strong data-start=\"7074\" data-end=\"7097\">190 \u00d7 100 \u00d7 40.5 mm<\/strong><\/p>\n<p data-start=\"7099\" data-end=\"7135\">Integration recommendations include:<\/p>\n<ul data-start=\"7137\" data-end=\"7313\">\n<li data-section-id=\"etn7s\" data-start=\"7137\" data-end=\"7201\">\n<p data-start=\"7139\" data-end=\"7201\">maintain clear airflow paths around intake and exhaust areas<\/p>\n<\/li>\n<li data-section-id=\"1gz2r0s\" data-start=\"7202\" data-end=\"7255\">\n<p data-start=\"7204\" data-end=\"7255\">avoid cable bundles blocking ventilation openings<\/p>\n<\/li>\n<li data-section-id=\"1hqy0k1\" data-start=\"7256\" data-end=\"7313\">\n<p data-start=\"7258\" data-end=\"7313\">verify internal chassis temperatures under maximum load<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7315\" data-end=\"7407\">The design uses <strong data-start=\"7331\" data-end=\"7355\">fan-assisted cooling<\/strong>, typically implemented with a compact internal fan.<\/p>\n<h2><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8538\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/02\/4.1_ATX-PC-Power-Supply_FSP400-50UCB.jpg\" alt=\"Diagram: 1U chassis airflow cross-section with PSU intake and exhaust, showing best practices for cable routing and keeping vents clear\" width=\"1920\" height=\"1067\" \/><\/h2>\n<\/section>\n<section>\n<p><!-- Generated image required (3\/5) --><\/p>\n<h3 data-section-id=\"1q6v58g\" data-start=\"7414\" data-end=\"7447\">Harness and Connector Planning<\/h3>\n<p data-start=\"7449\" data-end=\"7586\">For system integrators and panel builders, connector configuration and harness routing influence serviceability and assembly consistency.<\/p>\n<p data-start=\"7588\" data-end=\"7621\">For procurement reviews, confirm:<\/p>\n<ul data-start=\"7623\" data-end=\"7772\">\n<li data-section-id=\"pu8y9p\" data-start=\"7623\" data-end=\"7675\">\n<p data-start=\"7625\" data-end=\"7675\">required <strong data-start=\"7634\" data-end=\"7673\">connector types and harness lengths<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1k87ph7\" data-start=\"7676\" data-end=\"7726\">\n<p data-start=\"7678\" data-end=\"7726\">whether the <strong data-start=\"7690\" data-end=\"7712\">optional \u20135 V rail<\/strong> is required<\/p>\n<\/li>\n<li data-section-id=\"1wf0t3a\" data-start=\"7727\" data-end=\"7772\">\n<p data-start=\"7729\" data-end=\"7772\">labeling requirements for field maintenance<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7774\" data-end=\"7926\">Including the <strong data-start=\"7788\" data-end=\"7820\">manufacturer drawing package<\/strong> in production documentation helps ensure consistent cable routing and strain relief during manufacturing.<\/p>\n<h2 data-section-id=\"1loeb2f\" data-start=\"7933\" data-end=\"7984\">Controlled Start-Up: PS_ON#, 5VSB and Power-Good<\/h2>\n<p data-start=\"7986\" data-end=\"8055\">Industrial platforms often rely on <strong data-start=\"8021\" data-end=\"8054\">controlled start-up sequences<\/strong>.<\/p>\n<p data-start=\"8057\" data-end=\"8085\">The specification describes:<\/p>\n<ul data-start=\"8087\" data-end=\"8193\">\n<li data-section-id=\"12z622r\" data-start=\"8087\" data-end=\"8138\">\n<p data-start=\"8089\" data-end=\"8138\"><strong data-start=\"8089\" data-end=\"8107\">PS_ON# control<\/strong> (active-low, TTL compatible)<\/p>\n<\/li>\n<li data-section-id=\"lobh4l\" data-start=\"8139\" data-end=\"8193\">\n<p data-start=\"8141\" data-end=\"8193\"><strong data-start=\"8141\" data-end=\"8193\">+5 VSB availability whenever AC input is present<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"8195\" data-end=\"8322\">This allows system designers to implement <strong data-start=\"8237\" data-end=\"8260\">soft start-up logic<\/strong> using supervisory controllers or embedded management systems.<\/p>\n<p data-start=\"8324\" data-end=\"8341\">Typical sequence:<\/p>\n<ol data-start=\"8343\" data-end=\"8464\">\n<li data-section-id=\"9y4jb\" data-start=\"8343\" data-end=\"8367\">\n<p data-start=\"8346\" data-end=\"8367\">standby rail active<\/p>\n<\/li>\n<li data-section-id=\"evqnba\" data-start=\"8368\" data-end=\"8424\">\n<p data-start=\"8371\" data-end=\"8424\">environmental checks performed by system controller<\/p>\n<\/li>\n<li data-section-id=\"zkch01\" data-start=\"8425\" data-end=\"8464\">\n<p data-start=\"8428\" data-end=\"8464\">PS_ON# asserted to enable main rails<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"8466\" data-end=\"8469\" \/>\n<h2 data-section-id=\"1nmjlqn\" data-start=\"8471\" data-end=\"8506\">EMI and Grounding Considerations<\/h2>\n<p data-start=\"8508\" data-end=\"8607\">Achieving low noise at system level depends on both the power supply and the overall system design.<\/p>\n<p data-start=\"8609\" data-end=\"8633\">Design review checklist:<\/p>\n<ul data-start=\"8635\" data-end=\"8850\">\n<li data-section-id=\"u036tq\" data-start=\"8635\" data-end=\"8689\">\n<p data-start=\"8637\" data-end=\"8689\">avoid ground loops through chassis mounting points<\/p>\n<\/li>\n<li data-section-id=\"sob0f8\" data-start=\"8690\" data-end=\"8723\">\n<p data-start=\"8692\" data-end=\"8723\">keep high-current loops short<\/p>\n<\/li>\n<li data-section-id=\"1skrgbs\" data-start=\"8724\" data-end=\"8792\">\n<p data-start=\"8726\" data-end=\"8792\">route power harnesses carefully around sensitive analog sections<\/p>\n<\/li>\n<li data-section-id=\"1ujeozw\" data-start=\"8793\" data-end=\"8850\">\n<p data-start=\"8795\" data-end=\"8850\">validate emissions in the final enclosure configuration<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"8852\" data-end=\"8855\" \/>\n<h1 data-section-id=\"dngjzg\" data-start=\"8857\" data-end=\"8894\">RFQ Checklist for Procurement Teams<\/h1>\n<p data-start=\"8896\" data-end=\"8960\">To simplify quoting and sourcing, RFQs should typically include:<\/p>\n<ul data-start=\"8962\" data-end=\"9271\">\n<li data-section-id=\"1objqun\" data-start=\"8962\" data-end=\"9012\">\n<p data-start=\"8964\" data-end=\"9012\">required <strong data-start=\"8973\" data-end=\"9010\">quantity and production ramp plan<\/strong><\/p>\n<\/li>\n<li data-section-id=\"sdr0dk\" data-start=\"9013\" data-end=\"9064\">\n<p data-start=\"9015\" data-end=\"9064\">target <strong data-start=\"9022\" data-end=\"9062\">region or certification requirements<\/strong><\/p>\n<\/li>\n<li data-section-id=\"bkafy\" data-start=\"9065\" data-end=\"9109\">\n<p data-start=\"9067\" data-end=\"9109\"><strong data-start=\"9067\" data-end=\"9107\">connector and harness specifications<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1d2b5zw\" data-start=\"9110\" data-end=\"9166\">\n<p data-start=\"9112\" data-end=\"9166\">expected <strong data-start=\"9121\" data-end=\"9137\">load profile<\/strong> (e.g., peak +12 V current)<\/p>\n<\/li>\n<li data-section-id=\"1wup2t4\" data-start=\"9167\" data-end=\"9232\">\n<p data-start=\"9169\" data-end=\"9232\">environmental conditions such as <strong data-start=\"9202\" data-end=\"9230\">temperature and altitude<\/strong><\/p>\n<\/li>\n<li data-section-id=\"15baog3\" data-start=\"9233\" data-end=\"9271\">\n<p data-start=\"9235\" data-end=\"9271\">requested <strong data-start=\"9245\" data-end=\"9271\">documentation packages<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"9273\" data-end=\"9367\">Providing these parameters helps suppliers prepare accurate quotations and documentation sets.<\/p>\n<\/section>\n<section>\n<p><!-- Generated image required (4\/5) --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8542\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/02\/5.1_ATX-PC-Power-Supply_FSP400-50UCB.jpg\" alt=\"Infographic: RFQ checklist for FSP400-50UCB including quantity, region, compliance docs, harness requirements, load profile, environment\" width=\"1920\" height=\"1121\" \/><\/p>\n<\/section>\n<section>\n<h2>Typical Application Scenarios<\/h2>\n<p data-start=\"9407\" data-end=\"9465\">The FSP400-50UCB may be suitable for systems that require:<\/p>\n<h3 data-section-id=\"fzplh9\" data-start=\"9467\" data-end=\"9496\">Industrial PC Controllers<\/h3>\n<p data-start=\"9497\" data-end=\"9624\">IPC platforms combining motherboard, I\/O cards and communication interfaces often require stable multi-rail power distribution.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-8546\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2026\/02\/6.1_ATX-PC-Power-Supply_FSP400-50UCB.jpg\" alt=\"Realistic scene: industrial IPC controller in a factory cabinet connected to sensors and network equipment, powered by a 1U PSU in a rack shelf\" width=\"1920\" height=\"1153\" \/><\/p>\n<p><!-- Generated image required (5\/5) --><\/p>\n<h3 data-section-id=\"1jzvmzt\" data-start=\"9626\" data-end=\"9650\">Compact Workstations<\/h3>\n<p data-start=\"9651\" data-end=\"9767\">Engineering workstations and embedded computing systems may require reliable +12 V supply and standby functionality.<\/p>\n<h3 data-section-id=\"1wvgww4\" data-start=\"9769\" data-end=\"9798\">Storage and NAS Platforms<\/h3>\n<p data-start=\"9799\" data-end=\"9928\">Storage appliances typically combine drive arrays and management controllers requiring both main rails and standby functionality.<\/p>\n<h3 data-section-id=\"w7dvo8\" data-start=\"9930\" data-end=\"9972\">Communication and Automation Equipment<\/h3>\n<p data-start=\"9973\" data-end=\"10108\">Equipment deployed in regulated environments may require <strong data-start=\"10030\" data-end=\"10068\">traceable compliance documentation<\/strong> for integration into finished products.<\/p>\n<\/section>\n<section>\n<h1 data-section-id=\"1asiv5u\" data-start=\"10115\" data-end=\"10153\">Alternative TPS Power Supply Options<\/h1>\n<p data-start=\"10155\" data-end=\"10228\">Depending on system requirements, other power supplies may be considered.<\/p>\n<p data-start=\"10230\" data-end=\"10247\">Examples include:<\/p>\n<p data-start=\"10249\" data-end=\"10277\"><strong data-start=\"10249\" data-end=\"10277\">Higher-power IPC systems<\/strong><\/p>\n<ul data-start=\"10278\" data-end=\"10318\">\n<li data-section-id=\"1mb1kew\" data-start=\"10278\" data-end=\"10318\">\n<p data-start=\"10280\" data-end=\"10318\"><a href=\"https:\/\/tps-elektronik.com\/en\/fsp700-80psa-sk-700w-industrial-ipc-power-supply-80-plus-bronze\/\">FSP700-80PSA-SK (700 W industrial PSU)<\/a><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10320\" data-end=\"10347\"><strong data-start=\"10320\" data-end=\"10347\">Lower-power ATX systems<\/strong><\/p>\n<ul data-start=\"10348\" data-end=\"10382\">\n<li data-section-id=\"1l9esm3\" data-start=\"10348\" data-end=\"10367\">\n<p data-start=\"10350\" data-end=\"10367\"><a href=\"https:\/\/tps-elektronik.com\/en\/fsp300-70pfl-sk-300w-atx-industrial-power-supply\/\">FSP300-70PFL-SK<\/a><\/p>\n<\/li>\n<li data-section-id=\"rvbs1u\" data-start=\"10368\" data-end=\"10382\">\n<p data-start=\"10370\" data-end=\"10382\"><a href=\"https:\/\/tps-elektronik.com\/en\/fsp350-50sac-350w-atx12v-v2-4-power-supply-active-pfc-erp-2013\/\">FSP350-50SAC<\/a><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10384\" data-end=\"10401\"><strong data-start=\"10384\" data-end=\"10401\">500 W options<\/strong><\/p>\n<ul data-start=\"10402\" data-end=\"10459\">\n<li data-section-id=\"17spab7\" data-start=\"10402\" data-end=\"10418\">\n<p data-start=\"10404\" data-end=\"10418\"><a href=\"https:\/\/tps-elektronik.com\/en\/fsp500-50aac-500w-atx12v-v1-4-eps12v-v2-92-industrial-pc-power-supply\/\">FSP500-50AAC<\/a><\/p>\n<\/li>\n<li data-section-id=\"1f6gnf4\" data-start=\"10419\" data-end=\"10459\">\n<p data-start=\"10421\" data-end=\"10459\"><a href=\"https:\/\/tps-elektronik.com\/en\/fsp500-50fdb-500w-80-plus-gold-industrial-pc-power-supply-1u-server\/\">FSP500-50FDB (80 PLUS Gold server PSU)<\/a><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10461\" data-end=\"10488\"><strong data-start=\"10461\" data-end=\"10488\">DIN-rail power supplies<\/strong><\/p>\n<ul data-start=\"10489\" data-end=\"10553\">\n<li data-section-id=\"13yt482\" data-start=\"10489\" data-end=\"10509\">\n<p data-start=\"10491\" data-end=\"10509\"><a href=\"https:\/\/tps-elektronik.com\/en\/din-rail-power-supply-tps010-100w-gp-series-compact-switching-power-supply\/\">TPS010 GP Series<\/a><\/p>\n<\/li>\n<li data-section-id=\"1e4w95m\" data-start=\"10510\" data-end=\"10531\">\n<p data-start=\"10512\" data-end=\"10531\"><a href=\"https:\/\/tps-elektronik.com\/en\/din-rail-power-supply-tps030-130w-pro-series-24v-30-130w\/\">TPS030 PRO Series<\/a><\/p>\n<\/li>\n<li data-section-id=\"zudu4w\" data-start=\"10532\" data-end=\"10553\">\n<p data-start=\"10534\" data-end=\"10553\"><a href=\"https:\/\/tps-elektronik.com\/en\/tps100-320w-peak-dr-plus-din-rail-power-supply-170-power-boost\/\">TPS100 Peak DR-Plus<\/a><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10555\" data-end=\"10589\"><strong data-start=\"10555\" data-end=\"10589\">Ultra-compact Flex ATX systems<\/strong><\/p>\n<ul data-start=\"10590\" data-end=\"10606\">\n<li data-section-id=\"10u0su5\" data-start=\"10590\" data-end=\"10606\">\n<p data-start=\"10592\" data-end=\"10606\"><a href=\"https:\/\/tps-elektronik.com\/en\/fsp220-50fgbbi-220w-flex-atx-industrial-pc-power-supply\/\">FSP220-50FGBBI<\/a><\/p>\n<\/li>\n<\/ul>\n<\/section>\n<section>\n<h2 id=\"faq\">FAQ<\/h2>\n<h3 data-section-id=\"1eby8s1\" data-start=\"10620\" data-end=\"10669\">Is the FSP400-50UCB suitable for IPC systems?<\/h3>\n<p data-start=\"10670\" data-end=\"10870\">The model is positioned for IPC controllers, workstations, communication equipment, and storage systems. System designers should confirm cross-load and thermal conditions during system validation.<\/p>\n<h3 data-section-id=\"1uu6iaz\" data-start=\"10872\" data-end=\"10910\">What does 80 PLUS Bronze indicate?<\/h3>\n<p data-start=\"10911\" data-end=\"11091\">80 PLUS is a power supply efficiency certification program with defined efficiency thresholds at several load levels. Bronze represents one efficiency tier within this program.<\/p>\n<h3 data-section-id=\"j0wssm\" data-start=\"11093\" data-end=\"11140\">Does the PSU support remote on\/off control?<\/h3>\n<p data-start=\"11141\" data-end=\"11284\">Yes. The specification describes PS_ON# logic and standby rail behaviour, allowing controlled start-up through external system controllers.<\/p>\n<h3 data-section-id=\"1rofrav\" data-start=\"11286\" data-end=\"11325\">Are compliance documents available?<\/h3>\n<p data-start=\"11326\" data-end=\"11465\">Product documentation typically includes datasheets, mechanical drawings, and compliance declarations accessible from the product page.<\/p>\n<h3 data-section-id=\"y3lief\" data-start=\"11467\" data-end=\"11522\">How can system-level ripple and noise be minimized?<\/h3>\n<p data-start=\"11523\" data-end=\"11696\">System designers should apply good grounding practices, short high-current loops, proper airflow management, and validation testing in the final enclosure configuration.<\/p>\n<\/section>\n<\/article>\n\n<style id=\"wpforms-css-vars-4659-block-11af61b1-e128-4851-80bb-974eade097b6\">\n\t\t\t\t#wpforms-4659.wpforms-block-11af61b1-e128-4851-80bb-974eade097b6 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automation systems. This guide explains its electrical characteristics, integration considerations, and typical application scenarios.<\/p>\n","protected":false},"author":6,"featured_media":8562,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[53],"tags":[],"class_list":["post-8522","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-production"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>FSP400-50UCB 400W 1U Industrial Power Supply \u2013 Key Specs and Integration Guide<\/title>\n<meta name=\"description\" content=\"Technical overview of the FSP400-50UCB 400W 1U industrial ATX power supply. 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