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Black rectangular power supply unit with single 80 mm fan and visible cable bundle

TOPOWER

TOPOWER TOP-350PS3 350 W Micro PS3 ATX12V power supply

SKU CH-36WN-RA5SR MPN TOP-350PS3

A 350 W micro ATX12V unit with an 80 mm fan, 20+4 pin main connector, CPU 4+4 pin, one 6+2 pin PCIe, three SATA, three Molex, one 6 pin AUX, over-voltage and overload protection, and 100 mm depth

  • Max wattage350 W
  • Modular cablingNo
  • Fan configuration1 × 80 mm
  • Main power connector20+4 Pin
  • 12V railsSingle
  • PCIe power connectors1 × 6+2 Pin
  • 350 W continuous power for stable system operation
  • 100 mm compact depth fits small-form-factor cases
  • 20+4 pin, 4+4 pin CPU, 6+2 pin PCIe and 6 pin AUX connectors cover modern builds
  • Single +12 V rail simplifies power distribution
  • Over-voltage and overload protection safeguards components

Micro PS3 ATX12V 350 W power supply

The TOPOWER TOP-350PS3 is a compact 350 W unit built to the ATX12V standard for small-form-factor desktops or as a direct replacement in existing systems. It fits Micro PS3 chassis with a 100 mm depth and supplies a single +12 V rail rated for the full output.

Thermals noise and power draw

One 80 mm fan provides airflow through the enclosure while the supply draws 10 A at 115 V or 6 A at 230 V from the mains. Over-voltage and overload protection circuits shut the unit down if output limits are exceeded, keeping temperatures and acoustic levels predictable under normal load.

Bundled connectors and their effect

Fixed cables include a 20+4 pin motherboard connector, a 4+4 pin CPU plug, one 6+2 pin PCIe lead, one 6 pin AUX lead, three SATA power plugs and three Molex plugs. The mix covers a basic motherboard, processor, single graphics card and multiple drives without requiring modular cable management.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $48.99
Cheaper than about 91% of the 10,869 comparable items (median $142.99).
Max wattage 350 W
Lower than about 90% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameTOPOWER
Product linePS3
Model nameTOP-350PS3
Part numberTOP-350PS3
Product colorBlack
Product typeATX 12 V
Performance
Frequency50/60 Hz
Ports & slots
PCIe power connectors1 × 6+2 Pin
SATA power connectors3
Output type350 W
Connection types1 × 24 pin (20+4) ATX
12V power connector1 × 4+4 Pin ATX/EPS 12 V
Floppy connector1
Peripheral connector3
Power
Max wattage350 W
Modular cablingNo
Main power connector20+4 Pin
12V railsSingle
Overvoltage protectionYes
Overload protectionYes
Supply voltage115 / 230 V
AC input frequency50/60 Hz
Rated input current10A @ 115 V, 6A @ 230 V
Rated power350 W
+3.3V max. current12A
+5V max. current14A
+12V1 max. current18A
-12V max. current0.3A
+5VSB max. current2A
Size & build
Size or dimensions5.9 in(W)x3.94 in(L)x3.35 in(H)
Product weight3 lb (1.36 kg)
Rear fans size80 mm
Product dimensions5.9 in(W)x3.94 in(L)x3.35 in(H)
Compatibility
PSU length limit100 mm
In the box
Fans total quantity1
More details
Fan configuration1 × 80 mm
Over load protectionYes
Short circuit protectionYes

Questions about this item

How do I install the 100 mm micro ATX12V unit and which step is most often missed?

Mount the 100 mm deep chassis with four screws, connect the 20+4 pin motherboard plug and the 4+4 pin CPU plug, then switch the 115 / 230 V selector to match your mains before powering on.

What maintenance or replacement will the 80 mm fan need later?

The single 80 mm fan should be cleaned of dust every few months; if bearing noise appears, replace the entire unit because the supply is non-modular and the fan is not user-serviceable.

Which limit appears first during sustained 350 W load?

The single +12 V rail and 80 mm fan cooling capacity will hit thermal or current limits before the 350 W rating is sustained continuously.

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