Description

The Dell D240EM‑00 is a genuine internal power supply unit (PSU) made for select Dell OptiPlex desktop computers. It delivers up to 240 W of power, and is designed to fit directly into compatible Dell small form factor (SFF) or mini tower chassis without modification. This PSU provides stable and efficient power to essential components like the motherboard and CPU, making it suitable for everyday computing tasks in business or office environments.

Key Specifications

Power & Output

• Maximum Output Power: 240 W total capacity

• DC Output Rails:

  • +12VA: ~16.5 A

  • +12VB: ~16 A

  • +12VSB (standby): ~2.5 A

 Input

• AC Input Voltage: 100 – 240 V AC

• Input Frequency: 50 – 60 Hz

 Connectors

• P1: 8‑pin ATX power connector

• P2: 4‑pin auxiliary motherboard power connector

 Physical & Mounting

• Form Factor: Dell proprietary PSU (not standard ATX)

• Typical Dimensions: ~82 mm × 62 mm × 220 mm (may vary slightly by supplier)

• Cooling: Internal fan for active cooling

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Compatibility

This PSU is made for and commonly used in Dell OptiPlex desktops such as:

• OptiPlex 3040

• OptiPlex 3650 / 3656

• OptiPlex 5040

• OptiPlex 7040

• Often compatible with other similar SFF / MT Dell models that require a 240 W PSU with 8‑pin + 4‑pin connectors