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Rectangular silver server power supply unit with handle and ventilation grille

HP

HP 399542-B21 700W redundant server power supply

SKU CH-JKRH-6C79M MPN 399542-B21

700W redundant hot-plug power supply for ProLiant DL360 G5 servers with 100-240V input

  • Max wattage700 W
  • Power supply redundancyRedundant
  • Supply voltage100–240 V
  • Product typeConsumer Electronics
  • Key featuresCompatibility: HP ProLiant DL360 G5 HP ProLiant DL360 G5 Bas
  • Redundant design keeps the server running if one unit fails
  • 700 W output powers demanding ProLiant DL360 G5 workloads
  • Hot-plug capability allows replacement without shutting down the system
  • Active power-factor correction improves electrical efficiency across the input range
  • Wide 100-240 V input supports global deployment without voltage switches

Redundant 700W Server Supply

The HP 399542-B21 is a hot-plug redundant power module rated at 700W. It fits ProLiant DL360 G5 servers across Base, Entry and Performance configurations. IT teams use it to add fault-tolerant power to 1U rack systems without shutting down the host.

Thermals Noise and Power Draw

The unit accepts 100 to 240 V input and includes active power factor correction. Redundant operation shares load between modules, reducing per-unit stress and fan speed during typical workloads. Hot-swap capability allows replacement while the server remains online.

Upgrade Context

This supply replaces a failed or missing module in a DL360 G5 chassis to restore N+1 redundancy. The jump is worth it when uptime requirements exceed single-supply risk tolerance. It does not serve platforms outside the listed G5 family.

How it compares

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

Price $99.99
Cheaper than about 69% of the 3,798 comparable items (median $131.99).
Max wattage 700 W
Typical for this category: the median of 235 items is 668 W.

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Specifications

Product
Brand nameHP
Model name399542-B21
Product typeConsumer Electronics
Power
Max wattage700 W
Power supply redundancyRedundant
Supply voltage100–240 V
Size & build
Shipping weight2.04 kg
Package size495 × 203 × 203 mm

Questions about this item

How do I install the HP 399542-B21 700W redundant power supply into a ProLiant DL360 G5 and what step is often missed?

Slide the unit into the hot-plug bay until the latch clicks, then verify the amber LED turns green; the step often missed is confirming both modules show green before closing the chassis.

What maintenance or replacement will the HP 399542-B21 700W redundant power supply need later?

The internal fan is the only moving part; expect to replace the module when bearing noise appears or the status LED stays amber after reseating.

What limit appears first on the HP 399542-B21 700W redundant power supply under sustained load?

The 700W maximum output is the hard ceiling; once total draw reaches that level the supply will throttle or shut down to protect the server.

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