Dell 255W Small Form Factor Power Supply Unit (H1FWX)

Power up your Dell OptiPlex Small Form Factor desktop with this 255W power supply unit. It's built for office environments, IT departments, and repair technicians who need a reliable replacement PSU for Dell OptiPlex 3010, 7010, 9010, 390, 790, and 990 SFF systems.

Key specifications

• Power output: 255 W
• Form factor: Small Form Factor (SFF)
• Input voltage: 100-240 V AC
• Input frequency: 50/60 Hz
• Main power connector: 1x 8-pin ATX
• CPU power connector: 1x 4-pin ATX
• SATA power connectors: 1
• Efficiency rating: 80 PLUS Bronze
• Cooling: Active (internal fan)
• Protection features: OVP, OPP, SCP
• +12V rail output: 17 A
• +5V rail output: 15 A
• +3.3V rail output: 15 A
• +5V standby rail output: 2 A
• Power Factor Correction (PFC): Active PFC

Why choose it

This PSU delivers stable, efficient power for your SFF Dell desktop. With 80 PLUS Bronze efficiency and active PFC, it reduces energy waste and keeps your system cool. The built-in fan ensures quiet, reliable operation, while over-voltage, over-power, and short-circuit protection safeguard your components.

Ideal use cases

• Replacing a failed or aging power supply in Dell OptiPlex SFF desktops
• IT asset refurbishment and system upgrades
• Maintaining a fleet of office computers with a standardized spare part

Good to know

Dell part number H1FWX, interchangeable with RV1C6, 3MV8H, 2TXYM, 7769N. OEM model numbers: D255ES-00, AC255ES-00, L255ES-00.