Replace Power 420 W ATX power supply reduced depth for HP A342n A345c A345w A347x A350y A362n A365c A367c

Reduced-depth ATX replacement for HP desktops

This 420 W ATX power supply is built with a shorter chassis to fit HP A342n, A345c, A345w, A347x, A350y, A362n, A365c and A367c systems. It delivers a combined 280 W across the +5 V, +12 V1, +12 V2, +3.3 V, -12 V and +5 V standby rails. The unit ships new in a grey enclosure and includes an 80 mm fan for cooling. It is not suited for builds that require a full-depth ATX form factor or higher continuous power output.

Check connector count and chassis clearance

Verify that your motherboard uses a 20+4 pin main connector and a 4-pin CPU power plug before ordering. The harness provides three SATA 15-pin leads, two Molex 4-pin leads and one floppy 4-pin lead; ensure this matches your drive complement. Confirm the reduced depth of 5.86 inches clears internal cables and drive cages in the target case. The supply operates on 110/220 V input at 47 to 63 Hz, so check local mains compatibility.

Thermals, noise and power draw

An 80 mm fan handles airflow while the unit supplies up to 420 W peak and 280 W continuous load. Low ripple and noise figures are specified by the manufacturer, and the supply meets ROHS and CE requirements. Hold-up time is rated at 17 ms minimum at nominal input, with a rise time under 70 ms. In typical desktop use the fan runs at a steady speed to maintain stable temperatures without aggressive ramping.