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Rectangular metal power supply unit with ventilation grille and power socket

DELL

DELL N275P-00 275W power supply

SKU CH-EB84-793DH MPN N275P-00

Replacement 275 W unit for Dell Optiplex 740, 745, 755, GX520, GX620 and Dimension 5100c, 5150c small-form-factor systems

  • Powers Dell OptiPlex SFF desktops with 275W output
  • Replaces multiple Dell part numbers including N275P-01 and H275P-00
  • Fits OptiPlex 740, 745, 755, GX520 and GX620 models
  • Compatible with Dimension 5100c, 5150c and XPS 200, 210 systems
  • New unit backed by 90-day warranty

Dell 275W replacement PSU

This Dell N275P-00 power supply delivers 275W for compatible Optiplex and Dimension systems. It matches the original part for small form factor chassis such as the Optiplex 740, 745, 755, GX520 and GX620. The unit also fits Dimension 5100c, 5150c and XPS 200, 210 models. It is supplied new with a 90 day warranty.

Steady 275W output under load

The supply is rated for continuous 275W operation rather than a short burst peak. It maintains stable rails during typical office workloads and integrated graphics use. The design targets the thermal envelope of the listed SFF cases. Sustained loads near the maximum rating should be paired with adequate case airflow.

Verify chassis and connector fit

Confirm your system appears in the supported model list before ordering. Check that the physical dimensions and mounting holes match the original unit in your chassis. Ensure the main power and any peripheral connectors correspond to your motherboard layout. This PSU is not suitable for standard ATX towers or proprietary servers outside the listed range.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $28.99
Cheaper than about 95% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Model nameN275P-00

Questions about this item

How much power does the 275 W unit draw continuously when the OptiPlex runs all day?

The supply is rated for 275 W output; actual draw depends on the system load inside the OptiPlex 740, 745, 755, GX520, GX620, 5100c, 5150c, 9200c, XPS 200 or 210 SFF.

Which Dell chassis and motherboard connectors must already be present for this N275P-00 to fit?

It replaces Dell part numbers MH300, RW739, YK840, KH620, YD358, R8038, N8368, XM554, K8964, YD080, TD570, N8373, FR619, PW124, RM117, WU142 and fits the proprietary OptiPlex SFF mounting bracket.

Will the supply work with the original Pentium 4 or Core 2 Duo processors kept in a GX520 or 745?

Yes, the 275 W unit was shipped with those OptiPlex and Dimension models and supports the factory-installed CPUs and expansion cards.

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