255W SFF Power Supply for Dell OptiPlex 3020 7020 9020 T1700 SFF, Replacement for AC255ES-01 L255ES-00 L255ES-01 F255ES-00 D255AS-00 H255ES-00 H255ES-01

Aomoproing 255W Small Form Factor (SFF) power supply is a precision-built replacement for Dell OptiPlex 3020, 7020, 9020, and Precision T1700 SFF workstations. It fully replaces all OEM models: AC255ES-01, L255ES-00, L255ES-01, F255ES-00, D255AS-00, H255ES-00, H255ES-01, matching exact dimensions (72mm x 62mm x 239mm), connector layout, and electrical specs for true plug-and-play compatibility.

Featuring Dell's proprietary 8-pin main motherboard (P1) + 4-pin CPU (P2) power connectors, this PSU ensures a secure, factory-perfect fit with no modifications required. It delivers a stable 255W output with strong dual +12V rails (14A/13A) to reliably power all SFF componentsincluding CPUs, SSDs/HDDs, and low-profile graphics cardsunder continuous business workloads.

Designed for enterprise reliability, the unit supports universal 100-240V AC input (4.6A, 50/60Hz) and active power factor correction (PFC), delivering high efficiency and stable voltage across fluctuating power grids. Built-in Over-Voltage (OVP), Over-Current (OCP), Short-Circuit (SCP), and Over-Temperature (OTP) protection circuits safeguard your motherboard, drives, and peripherals from electrical damage.

Every unit undergoes rigorous electrical testing, load testing, and compatibility verification before shipment to guarantee consistent performance, perfect fit, and long-term durability. Ideal for system repair, maintenance, and upgrades in office, business, and industrial environments, this power supply ensures uninterrupted operation for your Dell SFF systems.