PWS-281-1H Supermicro Active 520W 1U Server PSU

High-Availability 1U AC ATX Power Supply Module for Supermicro Platforms with the PWS-281-1H

The PWS-281-1H is a 1U AC ATX PSU module engineered for Supermicro server chassis that require predictable power delivery and standardized harnessing in light-to-mid density compute nodes. Designed for 100–240V input operation with active PFC and active cooling, the PWS-281-1H supports global deployment profiles while maintaining stable rails for CPU, memory, and peripheral loads typical of compact 1U systems.

From an integration perspective, the PWS-281-1H provides ATX-aligned connectivity to simplify serviceability and inventory control across compatible Supermicro 1U platforms. The 24-pin ATX and 4-pin ATX12V connectors address core system power, while the 8-pin PCIe lead supports add-in requirements where present; legacy Molex and floppy connectors maintain support for auxiliary devices in mixed-generation estates. Built-in protection features including OVP, OCP, and SCP help isolate downstream components from fault conditions, reducing the risk of cascading outages during PSU events. Note that sources may reference differing wattage values; validate the rated output for the target chassis and load plan before deployment.

Why Choose the PWS-281-1H?

The PWS-281-1H is selected when operational continuity depends on fast, repeatable 1U PSU swaps and consistent ATX power topology across a fleet. It optimizes density-to-serviceability by enabling rapid depot replacement cycles, supports scalable rollouts through standardized cabling, and helps sustain enterprise reliability through defined electrical protections and controlled airflow within 1U thermal constraints.

Supermicro designs power modules with a platform-centric engineering approach focused on data centre compatibility, predictable integration into validated chassis, and maintainable field replacement workflows aligned with modern rack service standards.

Key Applications:

• Spare and replacement PSU inventory for Supermicro 1U servers
• Light-to-mid density 1U compute nodes
• Service depot standardization for rapid PSU exchange
• Mixed-generation peripheral support in compact systems

At Happyware - Server Hardware you benefit from non-binding offers tailored to your Supermicro bill of materials for the PWS-281-1H and the option to extend the warranty up to 6 years to protect long-life data centre deployments.