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

Supersuperuncle

Supersuperuncle 550W server power supply for DELL R420 R320

SKU CH-75P4-8ZBDM

A 550W server power supply compatible with DELL R420 and R320 systems

  • Compatible with Dell PowerEdge R420 and R320 servers
  • Delivers 550W output for stable server operation
  • New condition ensures reliable performance from first use
  • Replaces AC550E-S0 4XX1H J6J6M part numbers directly

Compatible Dell R420 R320 550W Server Power Supply

This 550 watt power supply is built for Dell PowerEdge R420 and R320 servers. It matches the AC550E-S0 specification and fits the 4XX1H and J6J6M part numbers. The unit delivers cold-plug power for these specific rack systems.

Suits administrators replacing a failed unit

This supply is not for builders needing hot-swap redundancy or a different form factor. It will not serve systems outside the named Dell models or workloads demanding a higher output than 550 watts.

How it compares

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

Price $127.99
Typical for this category: the median of 3,798 items is $131.99.

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Specifications

No published specifications for this item yet.

Questions about this item

Will the internal fan need replacement on the 550W unit?

The fan is a serviceable part; under normal server duty it typically runs for years before bearing wear requires a swap.

What limits sustained output on the 550W supply first?

Thermal protection engages before the 550W rating is exceeded, so continuous load is capped by cooling capacity rather than electrical headroom.

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