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Grey metal rectangular server PSU with dual 40mm fans, sliding main connectors, 200 by 100 by 40 mm

TOPOWER

TOPOWER TOP-300W1U-PFC 300W server power supply

SKU CH-T6KG-TG13R MPN TOP-300W1U-PFC

A 300 W single server power supply with 24-pin and 4/8-pin sliding connectors, dual 40 mm fans and 100–240 V input

  • Max wattage300 W
  • Power supply redundancySingle
  • Main power connector24Pin
  • Output current+3.3 V@22A, +5 V@22A, +12 V@20A, +5SB@3A
  • Supply voltage100–240 V
  • Fan configuration2
  • Delivers 300W continuous power for stable server operation
  • Wide 100-240V input suits global rack deployments
  • Thermally controlled 2x40mm fans keep noise low
  • Sliding 20/24-pin and 4/8-pin connectors speed installation
  • Full OVP OCP SCP protection safeguards every output rail

Server Power Supply 300W

The TOPOWER TOP-300W1U-PFC is a single 300W server power supply built for 1U industrial chassis. It accepts 100-240V input and uses forward circuitry with OVP, OCP and SCP protection on all outputs. The unit suits integrators who need a compact, reliable ATX12V/EPS12V source for embedded or rackmount systems.

300W Output and Rail Limits

The +12V rail delivers 20A while the +3.3V and +5V rails each provide 22A, with a combined minor-rail ceiling of 120W. A 3.3V auxiliary line supplies 3A for standby functions. This capacity covers typical single-socket server boards with modest drive counts, but leaves no headroom for high-wattage CPUs or multiple GPU accelerators.

Sliding Main Connectors and Dual Fans

The 20/24-pin and 4/8-pin main connectors use a sliding design that eases installation in tight 1U bays. Two 40mm fans run under thermal control with Silent Control Technology, reducing acoustic output at low load. Builders who need redundant supplies or modular cabling beyond the fixed leads must look elsewhere.

How it compares

Measured against everything we stock in Server & Hot-Plug PSUs, at today’s prices. Recalculated every night.

Price $49.99
Cheaper than about 87% of the 3,798 comparable items (median $131.99).
Max wattage 300 W
Lower than about 80% of the 235 comparable items (median 668 W).

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Specifications

Product
Brand nameTOPOWER
Model nameTOP-300W1U-PFC
Product typeATX12 V / EPS12 V
Power
Max wattage300 W
Power supply redundancySingle
Main power connector24Pin
Output current+3.3 V@22A, +5 V@22A, +12 V@20A, +5SB@3A
Supply voltage100–240 V
Size & build
Product dimensions200 × 100 × 40 mm
Shipping weight1.32 kg
Package size264 × 185 × 79 mm
More details
Fan configuration2

Questions about this item

Will this 300W unit run an older motherboard that still uses a 20-pin main power connector?

Yes, the sliding main connector fits both 20-pin and 24-pin motherboard sockets.

How can I verify the 12V rail is delivering its rated 20A after installation?

Measure the +12V output under load with a multimeter; it should stay within ATX12V / EPS12V tolerance.

Does the box include the 4/8-pin CPU power cable or must I buy it separately?

The 4/8-pin CPU connector is built into the sliding main cable assembly, so no separate cable is required.

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