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Rectangular silver metal PSU with fan grille and cable bundle

DELL

DELL KH620 275 W ATX 12V power supply

SKU CH-NFAZ-KJJ9Y

Delivers 275 W ATX 12V power to compatible Dell OptiPlex and Dimension desktops with single 12 V rail

  • TypeATX 12V
  • Maximum Power275 W
  • +12V Rails1
  • Input Voltage110 V AC 220 V AC
  • 275 W maximum output powers compatible Dell desktops
  • Single +12 V rail delivers 17 A for stable CPU supply
  • Dual-range 110 V AC to 220 V AC input suits global mains
  • ATX12V form factor fits Optiplex 740 745 755 SFF chassis
  • Output rails include 3.3 V 5 A 5 V 18 A and -12 V 500 mA

Dell KH620 275 W ATX 12V power supply

This Dell KH620 is a 275 W ATX 12V internal power supply designed as a direct replacement for specific Dell desktop PCs. It delivers 12 V at 17 A and 5 V at 18 A through a single +12 V rail. The unit accepts 110 V AC or 220 V AC input.

Who this suits and who should look elsewhere

It suits owners of a Dell OptiPlex 740, 745, 755, GX520, GX620, Dimension 9200C or XPS 210 needing an exact 275 W replacement. Builders requiring higher wattage, multiple +12 V rails, or a standard ATX form factor for a non-Dell chassis should look elsewhere.

The deciding specification: proprietary Dell form

The physical dimensions are 8.3 in by 3.3 in by 2.5 in with a weight of approximately 3 lb. This proprietary Dell form factor fits only the listed OptiPlex, Dimension and XPS models. Verify your chassis matches this exact size before ordering.

Pontos fortes

  • 275 W maximum output powers compatible Dell desktops
  • Single +12 V rail delivers 17 A for stable CPU supply
  • Dual-range 110 V AC to 220 V AC input suits global mains
  • ATX12V form factor fits Optiplex 740 745 755 SFF chassis
  • Output rails include 3.3 V 5 A 5 V 18 A and -12 V 500 mA

Especificações

BrandDELL
TypeATX 12V
Maximum Power275 W
+12V Rails1
Input Voltage110 V AC 220 V AC

Perguntas sobre este artigo

Will the 8.3" × 3.3" × 2.5" internal form factor fit my OptiPlex 755 SFF chassis?

The supply is built to the Dell SFF layout used in the OptiPlex 740, 745 and 755, so the mounting holes and rear bracket line up with those cases.

Which cables must be connected during installation, and which one do builders often forget?

Attach the 24-pin ATX12V main connector and the 4-pin CPU power lead; the 4-pin CPU plug is the one most frequently left loose.

The single +12 V rail is rated at 17 A — when should I plan to replace the unit?

Expect to swap the PSU if the system becomes unstable under load, the fan grows noisy, or after roughly five years of daily use.

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