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Supermicro PWS-302-1S 1U 300W server power supply

Supermicro

Supermicro PWS-302-1S 300W server power supply

SKU CH-SZSB-J4NFT MPN PWS-302-1S

A 300 W server power supply delivering +12 V at 22 A, +5 V and +3.3 V at 12 A each, and +5 VSB at 2 A

  • Max wattage300 W
  • Output current+12 V@22A, +5 V@12A, +3.3 V@12A, +5VSB@2A
  • Delivers 300 W for 1U server builds
  • +12 V rail supplies 22 A for CPU and GPU loads
  • +5 V and +3.3 V rails each provide 12 A for peripheral power
  • +5 VSB rail offers 2 A for standby management functions
  • Brand-new unit from Supermicro ready for immediate deployment

300 W 1U server power supply

The Supermicro PWS-302-1S is a 300 W AC-DC unit built for 1U rackmount chassis. It delivers +12 V at 22 A, +5 V at 12 A, +3.3 V at 12 A and +5 VSB at 2 A. The form factor suits compact servers or workstations that require redundant or hot-swap power modules.

Replaces lower-capacity 1U modules

When an existing 1U supply cannot sustain peak loads on the +12 V rail, this 300 W model adds headroom for additional drives or expansion cards. The jump is worth it if the current unit trips under combined rail demand or if the chassis documentation specifies a 300 W minimum.

Direct slide-in replacement

Installation follows the standard 1U hot-swap tray: remove the blank or failed module, insert this unit until the latch engages, and secure the thumbscrew. Common issues include mismatched backplane connectors on non-Supermicro chassis and forgetting to verify that the system power budget matches the 300 W rating.

How it compares

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

Price $88.99
Cheaper than about 74% 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 nameSuperMicro
Model namePWS-302-1S
Power
Max wattage300 W
Output current+12 V@22A, +5 V@12A, +3.3 V@12A, +5VSB@2A
Size & build
Shipping weight1.66 kg
Package size387 × 184 × 140 mm

Questions about this item

What form factor does the 300W unit use so I can check it fits my 1U server chassis?

The PWS-302-1S is a 1U server power supply designed to slide into a standard 1U redundant or single PSU bay.

How do I install the supply and which step do people often miss?

Slide the unit into the chassis until the latch clicks, then secure the retention screw; the step often missed is tightening that screw, which keeps the AC inlet seated.

When will the internal fan need attention or replacement?

The fan is rated for continuous server duty; plan to inspect it during routine chassis cleaning and replace it if bearing noise appears.

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