It’s about thermal margin, EMC predictability, safety documentation, and whether your build passes acceptance without rework.
The TPS-GSH180S Series is designed as a compact, single-output open-frame AC/DC switch-mode power supply that supports
85–264Vac or 120–370Vdc input, offers Active PFC, and provides reinforced electrical isolation up to 4000Vac.
It targets industrial control, automation machinery, and communication equipment where space, efficiency, and compliance are non-negotiable.
Buy / RFQ TPS-GSH180S-24V
|
Choose 24V with baseplate (better heat spreading)
What TPS-GSH180S is (and what “Open Frame / Enclosed” means for your project)
The TPS-GSH180S Series is an open-frame, single-output AC/DC power supply platform built for compact industrial equipment.
“Open frame” means the power stage is exposed (PCB + components), optimized for integration into your device.
In production deployments, “Enclosed” typically refers to your end product enclosure or an added protective cover that provides:
touch-safe access protection, controlled airflow, and a predictable EMC/grounding environment.
If you are building a machine controller, gateway, industrial HMI, or communication box, open-frame designs often win because:
they are compact (about 4 × 2 × 0.7 in class), efficient, and flexible in mounting and thermal coupling.
The tradeoff is that the enclosure is part of the power supply design—your airflow, mounting surface, and grounding choices
define whether you can run at 120W natural convection or safely reach the 180W fan-assisted envelope.
For fastest purchase execution, jump to the voltage you need:
12V,
24V,
24V + baseplate,
36V,
48V.
SKU selector: 12V / 24V / 24V+Baseplate / 36V / 48V
In BoFu stages, buyers want a simple mapping from “system requirement” to “orderable SKU.” The TPS-GSH180S family covers common industrial DC buses.
Choose by downstream load type, cable drop tolerance, and whether your design already has point-of-load conversion.
- 12V — embedded compute, sensors, small actuators, legacy 12V rails:
TPS-GSH180S-12V - 24V — default for industrial control cabinets, PLC islands, I/O, relays:
TPS-GSH180S-24V - 24V with baseplate — when you want better mechanical stability and heat spreading:
TPS-GSH180S-24V (with baseplate) - 36V — industrial comms, specialized loads, certain LED strings:
TPS-GSH180S-36V - 48V — telecom/PoE-related architectures, long cable runs, motor drivers:
TPS-GSH180S-48V
Electrical performance that matters in industrial integration
Wide AC/DC input, PFC, inrush and low-line derating
TPS-GSH180S supports 85–264Vac and 120–370Vdc, which is valuable when your equipment ships globally or runs behind different facility feeds.
It also includes Active PFC and reaches high PF at full load (typical spec shows PF >0.98 at 115Vac and >0.95 at 230Vac).
Engineering note for multi-supply cabinets: inrush current is specified as a cold start peak (typical values: 40A at 120Vac, 75A at 240Vac),
so sequencing or NTC strategy may be relevant at the system level.
The product characteristic curve indicates that at low input voltage, available output power must be derated (e.g., 85Vac ~60%, 115Vac ~83.3%),
while full power is supported across the higher input range.
If your application must operate at low-line continuously, treat “power supply selection” as a system derating exercise, not a catalog lookup.
Output regulation, ripple method, and voltage adjustment ranges
The series provides a single regulated output with:
tight line/load regulation, and an output adjust range that helps compensate for cable drop, diode drops, or minor system tuning.
Example adjust windows include roughly:
11.4–12.8V (12V model), 22.8–27V (24V), 33–39V (36V), and 45.6–54V (48V).
Ripple is typically specified as <60mVp-p for the 12V variant and <100mVp-p for higher voltage variants, and the datasheet documents the measurement setup
(0.1µF ceramic + 47µF electrolytic in parallel at the output, 20MHz bandwidth). Use this method if you compare lab results to datasheet claims—otherwise your scope setup
can overstate ripple and trigger unnecessary redesign cycles.
Protection suite: UVP / OCP hiccup / OVP / OTP
Industrial uptime depends on predictable fault behavior. TPS-GSH180S implements a robust protection suite including:
input undervoltage protection, short-circuit protection, overcurrent, overvoltage,
and overtemperature. Overcurrent and short-circuit behavior typically uses hiccup mode with automatic recovery.
Overvoltage protection shuts off the output and restarts to recover after reset conditions are met.
Thermal strategy: 120W natural convection vs 180W fan-assisted (10CFM) + derating
TPS-GSH180S is specified for two practical operating envelopes:
natural convection (typical 120W class) and fan-assisted cooling (up to 180W with ~10CFM airflow).
The most common integration mistake is assuming you can run 180W without designing airflow, ducting, or a defined exhaust path.
In open-frame builds, “ambient temperature” is often higher than your enclosure spec, because hotspots form around the PSU and nearby heat sources.
The temperature-load derating curve highlights the difference between natural convection and fan cooling:
at moderate ambient (e.g., around 45°C), fan cooling can sustain full load while natural convection requires significant derating.
Use this as a design review anchor: if your enclosure or cabinet can exceed 40°C internal air temperature, either derate power,
add airflow, or use the baseplate to spread heat into a conductive surface.
Practical design tips that improve project success rates:
- Define airflow: don’t rely on “leaks” — specify intake and exhaust paths.
- Keep clearance: avoid cable bundles blocking airflow above inductors and switching devices.
- Use baseplate when needed: the baseplate variant improves mechanical rigidity and heat dissipation.
- Validate at low-line: low input voltage reduces available power, increasing thermal stress per watt delivered.
If thermal margin is tight: choose 24V with baseplate
Need 48V bus? Order / RFQ TPS-GSH180S-48V
Mechanical integration: footprint, connectors, baseplate, LED/ADJ, mounting
Mechanical predictability is what turns a prototype into a production build. TPS-GSH180S is compact at about
101.6 × 50.8 × 17.8 mm (standard), and the aluminum plate option increases height to about
20.3 mm. This is a strong fit for “thin” enclosures, 1U adjacent modules, and smart devices where vertical clearance is limited.
The mechanical drawing documents:
a defined fan location (40×40×15mm class) for airflow-assisted operation,
a visible LED indicator point for service, and an ADJ point for output voltage trimming.
For production, treat output adjustment as a controlled process: setpoint, tolerance window, and a test record (especially for customers with audit requirements).
Connector mapping matters for harness repeatability. The drawing provides a typical pin position reference:
AC(N)/DC-, AC(L)/DC+ at the input connector, and +Vo/-Vo pins at the output connector.
For panel builders, this is where most assembly errors happen—build a keyed harness plan and a visual work instruction.
Mounting guidance (screw spec, recommended length, torque) is included in the mechanical page.
If your enclosure surface is uneven or heat conduction is poor, the drawing notes that thermal pads can be added to improve temperature rise performance.
Compliance & EMC: IEC 62368-1, CISPR 32 / EN 55032 Class B, surge immunity
If your customer is in automation, comms, medical-adjacent instruments, or OEM equipment sales, you will be asked for a compliance story.
The TPS-GSH180S datasheet references safety compliance aligned with IEC 62368 and EMC behavior aligned with
CISPR 32 / EN 55032 Class B, plus immunity test references in the IEC/EN 61000-4 family.
At system level, success still depends on your enclosure, cable layout, and grounding—so treat PSU compliance as “necessary but not sufficient.”
- Safety: IEC 62368-1 is a hazard-based safety standard used broadly in ICT/AV and related equipment classes.
- Emissions: CISPR 32 / EN 55032 Class B is relevant where residential-like emission limits apply (common for many commercial deployments).
- Immunity: IEC/EN 61000-4 test references help shape ESD/EFT/surge expectations and test planning.
Authoritative references (nofollow):
IEC 62368-1,
CISPR 32,
IEC 61000-4-5 (surge).
Where each voltage variant fits (automation, comms, LED, instruments)
12V: embedded rails and legacy 12V loads
Choose 12V when your downstream loads expect 12V directly (embedded compute, sensors, small motion, legacy devices),
or when you have tight point-of-load regulation already in place. If cable runs are long, consider voltage drop and whether a higher bus voltage
(24/48V) would be more robust.
Order / RFQ TPS-GSH180S-12V.
24V: the default industrial control bus
24V remains the most common cabinet bus for industrial automation: PLC I/O, relays, sensors, and control modules.
It also offers better cable-drop resilience than 12V while remaining safe and familiar for field technicians.
Buy / RFQ TPS-GSH180S-24V.
24V with baseplate: when mechanical + thermal stability is a requirement
If your enclosure sees elevated ambient, limited convection, vibration, or repeated thermal cycling, the baseplate option can improve:
heat spreading into a conductive surface, mechanical rigidity, and assembly repeatability.
Select TPS-GSH180S-24V with baseplate.
36V / 48V: comms, long cable runs, specialized loads
Higher DC buses reduce current for a given power level, which can lower I²R losses and improve cable-drop margins.
36V and 48V are common in comms-adjacent architectures and certain LED or driver ecosystems.
36V ·
48V
RFQ checklist (reduce back-and-forth, accelerate approval)
Want a quote you can approve fast? Provide these details in your RFQ so TPS can confirm fit, documentation, and delivery expectations in one pass:
- SKU + output voltage (12V / 24V / 24V+baseplate / 36V / 48V) and quantity ramp (proto → pilot → series).
- Input conditions: lowest AC/DC input expected (especially low-line continuous operation).
- Thermal strategy: natural convection vs fan-assisted; internal enclosure ambient estimate.
- Mechanical constraints: mounting orientation, clearance above PSU, conductive mounting surface availability.
- EMC environment: cable lengths, shielding, enclosure material, any known emissions constraints.
- Documentation needs: safety/EMC references and any customer audit checklist items.
Start RFQ from the TPS-GSH180S-24V product page
Or choose the baseplate variant for higher thermal margin
When to choose DIN-rail or ATX/IPC PSUs instead
TPS-GSH180S is ideal when you integrate inside a device enclosure. But some projects should choose a different form factor:
- DIN-rail cabinet builds (tool-less mounting, cabinet standards, 24V-centric distribution):
consider TPS010 GP Series (10–100W),
TPS030 PRO Series (30–130W),
or TPS100 Peak DR-Plus (power boost). - IPC / PC-like platforms that require ATX rails or standard harnessing:
compare FSP300-70PFL-SK or
FSP700-80PSA-SK. - Need a 1U industrial PSU for rack integration? See
FSP300-50UCB (1U).
FAQ
Is TPS-GSH180S an “enclosed” power supply?
The series is specified as open-frame. In practice, many “Open Frame/Enclosed” projects use open-frame PSUs mounted inside a product enclosure or under a protective cover.
That enclosure becomes part of the safety/EMC/thermal design.
How do I reach 180W output safely?
Treat 180W as a fan-assisted operating envelope. Provide a defined airflow path and verify enclosure internal temperature at worst-case input and load.
If thermal margin is tight, choose the baseplate option to improve heat spreading.
Can I adjust the output voltage?
Yes, the series provides an output adjustment function (e.g., 24V model typically adjusts roughly 22.8–27V).
Use controlled procedures in production to keep output within your system tolerance and documentation needs.
What EMC standards are referenced?
The datasheet references CISPR 32 / EN 55032 Class B and IEC/EN 61000-4 family test references. Final compliance still depends on your enclosure and wiring.
Which SKU is the safest default for industrial control?
Most control cabinets and industrial I/O ecosystems default to 24V. Start with TPS-GSH180S-24V unless your load or architecture requires a different bus voltage.
