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Rectangular silver server power module with black handle and ventilation grille

HP

HP 500W Flex Slot Platinum Power Supply Kit 720478-B21

SKU CH-2QM6-SWF51

500 W hot-pluggable server power supply with 94 % efficiency and 25 % smaller form factor

  • Max wattage500 W
  • Power efficiency94
  • Supply voltage100–240 V
  • Product typePower Module
  • Key featuresHot Pluggable
  • Up to 94 % efficiency cuts data-centre power waste
  • 500 W maximum output meets ProLiant DL300 Gen9 demands
  • Hot-pluggable design enables tool-less replacement during operation
  • Flex Slot form factor is 25 % smaller than prior units
  • 80 Plus Platinum certification validates high-efficiency performance

500 W Platinum Hot-Plug Power Module

This HP Flex Slot power supply delivers up to 500 W of output with 94 percent efficiency at 80 Plus Platinum level. It is designed for data-centre servers that require redundant, hot-swappable power in a compact form factor.

ProLiant DL300 Gen9 compatibility and slot space

The unit fits the Flex Slot bay used across the ProLiant DL300 Gen9 family and is 25 percent smaller than the previous generation, freeing space for additional server options. Verify that your chassis accepts Flex Slot modules and that the total load stays within the 500 W rating.

Efficiency, noise and thermal behaviour

At 94 percent efficiency the module wastes less power as heat, helping to lower overall rack temperatures. Hot-plug capability allows replacement without shutting down the server, reducing service interruption while maintaining stable power delivery.

How it compares

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

Price $15.99
Cheaper than about 97% of the 3,798 comparable items (median $131.99).
Max wattage 500 W
Lower than about 60% of the 235 comparable items (median 668 W).

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Specifications

Product
Brand nameHP
Product typePower Module
Power
Max wattage500 W
Power efficiency94
Supply voltage100–240 V

Questions about this item

Does the kit include the power cable or must it be purchased separately?

The kit is a hot-pluggable 500 W Flex Slot power module; the AC power cable is not included and must be sourced to match your local 100-240 V supply.

Which part numbers correspond to this 500 W Platinum unit versus the higher-wattage options?

This unit carries retail part 720478-B21 and option parts 723594-001, 754377-001 and 723595-101; the 1400 W Platinum Plus supply uses a different option number.

What does the 94 % efficiency rating deliver in a ProLiant DL300 Gen9 server?

At 94 % typical efficiency the 500 W module draws less AC power for the same DC load, cutting waste heat and lowering operating cost in the supported DL300 Gen9 family.

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