{"id":6410,"date":"2026-01-28T09:30:00","date_gmt":"2026-01-28T08:30:00","guid":{"rendered":"https:\/\/tps-elektronik.com\/?p=6410"},"modified":"2026-01-29T15:43:57","modified_gmt":"2026-01-29T14:43:57","slug":"fsp350-50sac-350w-atx12v-v2-4-power-supply-active-pfc-erp-2013","status":"publish","type":"post","link":"https:\/\/tps-elektronik.com\/en\/fsp350-50sac-350w-atx12v-v2-4-power-supply-active-pfc-erp-2013\/","title":{"rendered":"FSP350-50SAC: 350W ATX12V v2.4 Power Supply with Active PFC and ErP 2013 Alignment"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Key Takeaways<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compact <strong><a href=\"https:\/\/www.shop-tps.com\/shop\/fsp350-50sac-19360#attr=\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">350 W switching power supply<\/a><\/strong> designed for small PCs and industrial systems<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.shop-tps.com\/web\/image\/66931?unique=3d212349f7c08c0f37f721eaf572e58690088ab4\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">ATX12V v2.4<\/a><\/strong> design with <strong>EPS12V v2.92 compatibility<\/strong> for modern platforms<\/li>\n\n\n\n<li><strong>Active PFC<\/strong> and an <strong>82\/85\/82 efficiency design<\/strong> targeting reduced heat and standby losses<\/li>\n\n\n\n<li>Standard ATX rail set (<strong>+3.3 V, +5 V, +12 V, \u221212 V, +5 VSB<\/strong>) with specified ripple and noise limits<\/li>\n\n\n\n<li>Integrated protection functions suitable for <strong>continuous-operation systems<\/strong><\/li>\n\n\n\n<li><strong>80 mm fan cooling<\/strong> and defined operating temperature range for enclosed installations<\/li>\n<\/ul>\n\n\n\n<p>When a system is expected to operate continuously\u2014whether as an industrial controller, network appliance, or compact workstation\u2014the power supply becomes a functional part of overall system reliability. The FSP350-50SAC is designed with this context in mind, focusing on stable outputs, defined protections, and predictable thermal behavior for real-world enclosures.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2025\/12\/1_Product_ATX-PC-Power-Supply_FSP350-50SAC.jpg\" alt=\"FSP350-50SAC power supply product photo showing compact ATX PSU housing with AC inlet, rear power switch, and top fan grille for airflow.\" class=\"wp-image-6415\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Compact 350 W ATX PSU for Space-Constrained Systems<\/h2>\n\n\n\n<p>The FSP350-50SAC is positioned as a compact 350 W ATX power supply for small PCs and industrial systems. It combines a metal enclosure measuring <strong>100 \u00d7 125 \u00d7 63.5 mm<\/strong>, a standard <strong>C14 AC inlet<\/strong>, and an integrated <strong>80 mm cooling fan<\/strong>\u2014a practical configuration for systems with fixed airflow paths and limited internal space.<\/p>\n\n\n\n<p>For regulated environments, the product documentation references common compliance expectations such as <strong>RoHS, CE, UL, WEEE, and UKCA<\/strong>, supporting smoother procurement and system-level qualification workflows.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Electrical Architecture and Efficiency Targets<\/h2>\n\n\n\n<p>According to the published specification, the FSP350-50SAC is an AC-line powered switching power supply featuring:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Active power factor correction (PFC)<\/strong><\/li>\n\n\n\n<li><strong>ATX12V v2.4<\/strong> compliance<\/li>\n\n\n\n<li><strong>EPS12V v2.92 compatibility<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The internal architecture derives the <strong>+5 V and +3.3 V rails from the +12 V rail using DC-DC conversion<\/strong>, a common approach in modern PSU designs to support tighter voltage regulation under dynamic load conditions.<\/p>\n\n\n\n<p>Efficiency performance is documented using an <strong>82\/85\/82 design target<\/strong> across light, typical, and full load conditions. Standby behavior aligns with <strong>ErP-era requirements<\/strong>, which is relevant for systems that spend extended periods in low-load or standby states.<\/p>\n\n\n\n<p>On the input side, the PSU supports a wide AC input range and maintains a high power factor at full load\u2014an important consideration in installations where line loading and harmonics must be managed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Output Rails and Signal Quality<\/h2>\n\n\n\n<p>The power supply provides a standard ATX rail configuration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>+3.3 V<\/li>\n\n\n\n<li>+5 V<\/li>\n\n\n\n<li>+12 V<\/li>\n\n\n\n<li>\u221212 V<\/li>\n\n\n\n<li>+5 VSB<\/li>\n<\/ul>\n\n\n\n<p>This rail set supports typical PC and embedded system loads, including logic circuitry, storage devices, cooling fans, peripherals, and standby-powered functions. Combined load limits are defined in the specification, including shared budgets for the +3.3 V and +5 V rails and a high-current capability on the +12 V rail.<\/p>\n\n\n\n<p>For signal integrity, the PSU specifies ripple and noise limits measured at the load-side connector using the defined test configuration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>50 mV p-p<\/strong> on +3.3 V, +5 V, and +5 VSB<\/li>\n\n\n\n<li><strong>120 mV p-p<\/strong> on +12 V and \u221212 V<\/li>\n<\/ul>\n\n\n\n<p>These limits are relevant for systems using high-speed storage, communication modules, or sensitive I\/O interfaces.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Protection Functions<\/h2>\n\n\n\n<p>To support stable operation in industrial and commercial systems, the FSP350-50SAC includes the following protection mechanisms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Over-voltage protection (OVP)<\/li>\n\n\n\n<li>Over-current protection (OCP)<\/li>\n\n\n\n<li>Short-circuit protection (SCP)<\/li>\n\n\n\n<li>Over-power protection (OPP)<\/li>\n<\/ul>\n\n\n\n<p>Short-circuit events are specified to trigger a latch-off shutdown, while over-power conditions initiate shutdown when output exceeds the defined operating window. These functions are intended to help limit the impact of wiring faults or abnormal load conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Thermal Management and Environmental Conditions<\/h2>\n\n\n\n<p>Thermal management is handled by an integrated <strong>80 mm fan<\/strong>, powered from the internal 12 V rail. Acoustic behavior is specified under defined load conditions.<\/p>\n\n\n\n<p>The documented environmental limits include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Operating temperature:<\/strong> +0 \u00b0C to +40 \u00b0C<\/li>\n\n\n\n<li><strong>Storage temperature:<\/strong> \u221220 \u00b0C to +70 \u00b0C<\/li>\n<\/ul>\n\n\n\n<p>These ranges are typically suitable for industrial PCs, control cabinets, and edge systems installed in ventilated enclosures.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Reliability and Timing Characteristics<\/h2>\n\n\n\n<p>For long-term planning, the specification references a <strong>mean time between failures (MTBF) exceeding 100,000 hours<\/strong>, calculated using the <strong>MIL-HDBK-217<\/strong> methodology at full load and 25 \u00b0C ambient temperature. This positions the unit for applications where continuous operation is expected.<\/p>\n\n\n\n<p>System-level timing behavior is also defined, including <strong>Power Good signal timing<\/strong> and <strong>hold-up time<\/strong>, supporting predictable system startup and tolerance to brief input interruptions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"724\" src=\"https:\/\/tps-elektronik.com\/wp-content\/uploads\/2025\/12\/2_Product_ATX-PC-Power-Supply_FSP350-50SAC.jpg\" alt=\"FSP350-50SAC mechanical drawing and cable assembly diagram showing dimensions, airflow direction, connector pinout, and harness layouts for integration.\" class=\"wp-image-6418\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Typical Application Areas<\/h2>\n\n\n\n<p>The FSP350-50SAC is commonly considered for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compact industrial PCs and embedded controllers<\/li>\n\n\n\n<li>Small workstations and edge compute systems with limited airflow<\/li>\n\n\n\n<li>Network appliances and always-on equipment requiring controlled standby behavior<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Integration and Sourcing Support<\/h2>\n\n\n\n<p>For projects involving industrial PC builds or regulated deployments, <strong><a href=\"https:\/\/tps-elektronik.com\/en\/contact\/\" type=\"page\" id=\"1154\">TPS Elektronik<\/a><\/strong> can support product selection, documentation review, and sourcing of the FSP350-50SAC. Additional guidance on harnessing, airflow planning, and protection behavior during system validation can also be provided.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<p><strong>Is the FSP350-50SAC compatible with standard ATX and EPS motherboards?<\/strong><br>Yes. It is specified as an ATX12V v2.4 power supply with EPS12V v2.92 compatibility, making it suitable for many PC and industrial PC platforms.<\/p>\n\n\n\n<p><strong>What does active PFC mean in this context?<\/strong><br>Active PFC improves power factor and reduces input current distortion, supporting cleaner interaction with the AC supply, especially in always-on or multi-system installations.<\/p>\n\n\n\n<p><strong>What efficiency level is specified?<\/strong><br>The PSU follows an 82\/85\/82 efficiency design target across light, typical, and full load conditions.<\/p>\n\n\n\n<p><strong>Is it suitable for low standby power applications?<\/strong><br>It is positioned as an <strong>ErP 2013\u2013aligned power supply<\/strong>, which is relevant for systems operating in standby or low-load modes.<\/p>\n\n\n\n<p><strong>Which output rails are available?<\/strong><br>The unit provides +3.3 V, +5 V, +12 V, \u221212 V, and +5 VSB rails in a standard ATX configuration.<\/p>\n\n\n\n<p><strong>What protection features are included?<\/strong><br>OVP, OCP, SCP, and OPP are implemented to help manage fault and overload scenarios.<\/p>\n\n\n\n<p><strong>How is cooling handled?<\/strong><br>Cooling is provided by an integrated 80 mm fan, designed for use in compact enclosures with defined airflow paths.<\/p>\n\n\n\n<p><strong>Is it appropriate for 24\/7 operation?<\/strong><br>Based on the specified MTBF and operating limits, it is positioned for systems intended to run continuously under defined conditions.<\/p>\n\n\n<style id=\"wpforms-css-vars-4659-block-293bf8e1-7b9b-4ef4-b991-bab34335934a\">\n\t\t\t\t#wpforms-4659.wpforms-block-293bf8e1-7b9b-4ef4-b991-bab34335934a {\n\t\t\t\t--wpforms-field-size-input-height: 43px;\n--wpforms-field-size-input-spacing: 15px;\n--wpforms-field-size-font-size: 16px;\n--wpforms-field-size-line-height: 19px;\n--wpforms-field-size-padding-h: 14px;\n--wpforms-field-size-checkbox-size: 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operation.<\/p>\n","protected":false},"author":6,"featured_media":6412,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[53],"tags":[],"class_list":["post-6410","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 v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>FSP350-50SAC 350W ATX Power Supply for Industrial and Embedded PCs<\/title>\n<meta name=\"description\" content=\"Technical overview of the FSP350-50SAC 350W ATX12V power supply with active PFC, ErP-aligned standby behavior, defined protections, and compact design for industrial and embedded systems.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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