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Rectangular silver metal power supply unit with rear fan grille and multiple cable connectors

DELL

DELL 240W Proprietary Power Supply 0706M 2P1RD W72XN 4GTN5 H62JR H240AM-02 D240A007L AC240NM-00 AC240EM-00

SKU CH-N311-2E3KP

Proprietary 240 W power supply with 12 V 8-pin and 4 V 4-pin connectors for OptiPlex 3040, 5040, 7040, Inspiron 3650, 3656 and Precision 3420

  • TypeProprietary Power Supply
  • 240 watt output powers compatible Dell desktops
  • 12V 8-pin and 4V 4-pin connectors fit listed models
  • Proprietary Dell form factor ensures correct fit
  • Replaces nine Dell part numbers including 0706M
  • Compatible with OptiPlex 3040 5040 7040 Inspiron 3650 3656 Precision 3420

Proprietary Dell Power Supply

This proprietary 240W power supply is built for Dell Optiplex 3040, 5040 and 7040 desktops, as well as Inspiron 3650, 3656 and Precision 3420 workstations. It replaces units with part numbers such as 0706M, 2P1RD, W72XN, 4GTN5, H62JR, H240AM-02, D240A007L, AC240NM-00 or AC240EM-00. The unit ships new and is intended for owners who need a direct replacement for a failed or missing original supply.

Thermals, Noise and Power Draw

Rated at 240W, the supply delivers a 12V rail and a 4V rail through an 8-pin and a 4-pin connector respectively. Under typical office workloads the unit runs within its design envelope, drawing only the power the system components require. Fan speed is managed by the host chassis, so acoustic output matches the original Dell thermal profile for these small-form-factor and tower models.

Sustained Load Behaviour

During extended use the supply maintains its rated 240W output without exceeding the thermal limits defined for the compatible Optiplex, Inspiron and Precision platforms. It is not suited for systems that demand higher continuous wattage or additional PCIe power connectors beyond the two provided. Builders planning graphics upgrades or extra drive arrays should verify the platform power budget before relying on this unit.

Highlights

  • 240 watt output powers compatible Dell desktops
  • 12V 8-pin and 4V 4-pin connectors fit listed models
  • Proprietary Dell form factor ensures correct fit
  • Replaces nine Dell part numbers including 0706M
  • Compatible with OptiPlex 3040 5040 7040 Inspiron 3650 3656 Precision 3420

Specifications

BrandDELL
TypeProprietary Power Supply

Questions about this item

How do I connect the 12V 8-pin and 4V 4-pin cables when installing this 240W power supply in a Dell Optiplex 7040?

Align each keyed connector with its socket on the motherboard and press until the latch clicks; the 8-pin and 4-pin plugs are not interchangeable so verify the pin count before forcing either one.

Which components inside this proprietary unit are most likely to need replacement after several years of daily use?

The internal cooling fan and the electrolytic capacitors on the primary side are the parts that typically degrade first under continuous 240W load.

At what point does sustained output trigger the protection circuit on this 240W supply?

The over-current protection engages when the combined rails exceed the rated 240 watts, shutting the unit down until the load is reduced.

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