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Compact rectangular server PSU, platinum label, hot-plug handle

HPE

HPE 800W Flex Slot Platinum Plus Hot Plug Power Supply P38995-B21

SKU CH-C7TH-D0KTC

Redundant 800 W server power supply with 94 % efficiency, hot-plug Flex Slot design and 100-240 V input

  • Max wattage800 W
  • Power supply redundancyRedundant
  • Supply voltage100–240 V
  • Product typeRedundant Power Supply
  • Up to 94 % efficiency with 80 Plus Platinum certification
  • 25 % smaller form factor frees space for extra server options
  • Hot-plug design enables tool-less replacement without downtime
  • Redundant 800 W output supports ProLiant DL300 Gen9 family
  • Universal 100–240 V input works worldwide

Server Redundant Power Supply

The HPE 800W Flex Slot Platinum Plus unit delivers 800W of redundant power for Proliant DL300 Gen9 servers. Its 94% efficiency rating reduces data-centre power waste while the hot-plug design allows tool-less replacement during operation.

Compatibility Check

Verify the server chassis accepts Flex Slot form-factor supplies and that the 100-240 V input range matches local mains voltage. Confirm the existing power configuration supports redundant operation before ordering.

Build Integration

The 25% smaller Flex Slot footprint frees internal space for additional server options and simplifies spares strategy across the supported server family. Hot-plug capability enables maintenance without system downtime.

How it compares

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

Price $35.99
Cheaper than about 91% of the 3,798 comparable items (median $131.99).
Max wattage 800 W
Higher than about 70% of the 235 comparable items (median 668 W).

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Specifications

Product
Brand nameHPE
Product line80 Plus
Part numberP38995-B21
Product typeRedundant Power Supply
Power
Max wattage800 W
Power supply redundancyRedundant
Supply voltage100–240 V

Questions about this item

What comes in the box with the P38995-B21 power supply, and are cables or a rack kit included?

The unit ships as the hot-plug power supply module itself. Power cords and any required mounting hardware are ordered separately to match the target rack or PDU.

How do I decide between the 800 W Platinum Plus Flex Slot unit and other Flex Slot wattages?

Choose the 800 W model when the server configuration demands up to 800 W of redundant power with 94 % efficiency; lower-wattage Flex Slot units exist for lighter loads.

What does the 800 W rating mean once the supply is installed in a server?

It delivers up to 800 W of output power at 94 % efficiency across a 100 – 240 V input range, in a form factor 25 % smaller than earlier supplies, with tool-less hot-plug replacement.

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