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Rectangular silver server power supply unit with rear fan grille and 24-pin connector

Supermicro

Supermicro PWS-406P-1R 400W server power supply

SKU CH-GDRP-MF4Y4 MPN PWS-406P-1R

Delivers 400W via a 24-pin connector with 12V at 33A and 80 Plus PFC in a compact redundant form factor

  • Maximum Power400W
  • Main Connector24Pin
  • Output Current+12V@33A, 5V Standby@3A
  • FeaturesPFC: Yes 80 Plus
  • Dimensions8.66" x 1.97" x 1.57"
  • Delivers 400W for stable server operation
  • 24-pin main connector fits standard server boards
  • Active PFC improves power efficiency and quality
  • 80 Plus certification confirms high energy efficiency
  • Compact 8.66 x 1.97 x 1.57 inch form factor

400W redundant server supply

The Supermicro PWS-406P-1R is a 400W hot-swap power module built for 1U and 2U rackmount servers. It delivers +12V at 33A plus a 5V standby rail at 3A through a single 24-pin main connector. The unit carries 80 Plus certification and active PFC for efficient AC-to-DC conversion in always-on environments.

Redundant form factor and cabling

At 8.66" x 1.97" x 1.57" the supply slides into a standard redundant bay and locks with a thumbscrew, letting technicians swap units without tools or downtime. The 24-pin output mates directly to compatible Supermicro backplanes, so no adapter cables are required. Active PFC and 80 Plus rating reduce waste heat, easing cooling load in dense racks.

Replaces failed or capacity-constrained modules

This unit restores full redundancy when an identical module fails or when a lower-wattage supply can no longer support added drives or CPU upgrades. The jump is worth it when the chassis already accepts the PWS-406P-1R form factor and the 400W ceiling matches the new load calculation. Servers needing higher output or a different connector layout cannot use this module.

Points forts

  • Delivers 400W for stable server operation
  • 24-pin main connector fits standard server boards
  • Active PFC improves power efficiency and quality
  • 80 Plus certification confirms high energy efficiency
  • Compact 8.66 x 1.97 x 1.57 inch form factor

Caractéristiques

BrandSuperMicro
ModelPWS-406P-1R
Maximum Power400W
Main Connector24Pin
Output Current+12V@33A, 5V Standby@3A
FeaturesPFC: Yes
80 Plus
Dimensions8.66" x 1.97" x 1.57"
Poids d’expédition1.47 kg
Dimensions du colis381 × 184 × 140 mm

Questions sur cet article

What does the 24-pin main connector limit in practice?

The 24-pin main connector delivers up to 400W total, with the +12V rail capped at 33A and 5V standby at 3A.

Will the 8.66" x 1.97" x 1.57" module fit my 1U chassis?

At 1.57" tall and 1.97" wide it matches the standard 1U redundant form factor; verify your chassis accepts this exact length.

How is the unit installed and what step is often missed?

Slide the module into the bay until the latch clicks, then secure the retention screw; skipping the screw leaves the unit loose under vibration.

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