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Rectangular silver server power supply unit with rear exhaust grille and power connector

WMtec

WMtec 550W Server Power Supply for Dell R420 320 AC550E-S0

SKU CH-0GNB-HS88W

A 550-watt replacement power supply compatible with Dell R420 and R320 servers using part numbers AC550E-S0, 4XX1H or J6J6M

  • 550 W output keeps Dell PowerEdge R420 running under load
  • Direct replacement for AC550E-S0, 4XX1H and J6J6M part numbers
  • New unit installs without modification in 320 and 420 chassis
  • Server-grade build delivers continuous power for critical workloads

Replacement PSU for Dell R420 and R320

This 550 watt server power supply is built to fit Dell PowerEdge R420 and R320 systems. It matches the AC550E-S0 specification and the 4XX1H and J6J6M part numbers. The unit is new and intended for direct replacement in compatible rack servers.

No bundled accessories or software

The product ships as the power supply module only. No cables, mounting brackets, management software or additional components are included. Buyers who need extra cabling or a redundant pair must source those separately.

How it compares

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

Price $266.99
Pricier than about 81% of the 3,798 comparable items (median $131.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How often does the internal fan in the 550W AC550E-S0 need cleaning or replacement?

The unit uses a standard server-grade fan; inspect it during routine chassis maintenance and replace if bearing noise or reduced airflow appears.

What protection triggers first when the 550W AC550E-S0 runs at full load continuously?

Over-temperature protection will shut the supply down before the 550W output limit is exceeded.

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