PWS-1K31D-1R Supermicro Active 1300W 1U Server PSU

High-Density 1U Redundant DC Hot-Swap Power Supply Module with the PWS-1K31D-1R

The PWS-1K31D-1R is a 1U hot-swap server power supply module engineered for Supermicro redundant power subsystems in carrier-grade DC facilities. Designed around a -48V nominal DC bus, the PWS-1K31D-1R operates across a -44V to -65V input range to tolerate real-world plant variation while maintaining stable DC rails for modern server CPU, memory, and PCIe fabrics.

With 1300W capacity and up to 92% peak efficiency, the PWS-1K31D-1R targets high-density racks where thermal headroom and power conversion losses directly impact cluster scalability. PMBus 1.2 enables platform-level power telemetry and policy control to align power budgets with workload phases, while fixed cabling simplifies known-good integration in validated chassis. Protection mechanisms including OVP, OCP, and SCP are implemented to isolate faults and reduce the blast radius during transient events, supporting predictable operation for storage backplanes, accelerator nodes, and expansion-heavy PCIe configurations.

Why Choose the PWS-1K31D-1R?

The PWS-1K31D-1R provides an architecturally clean path to N+1 redundancy in 1U footprints, minimizing downtime exposure without sacrificing power density. For DC-powered data halls, the PWS-1K31D-1R supports consistent deployment patterns across rows, enabling repeatable maintenance workflows via hot-swap serviceability and PMBus-assisted monitoring for proactive replacement planning.

Supermicro designs power modules with an enterprise reliability focus, emphasizing validated subsystem interoperability, protection-first electrical design, and alignment with modern data centre operational standards. The PWS-1K31D-1R integrates into Supermicro’s redundant power ecosystems to support uniform lifecycle management and stable fleet behavior under load.

Key Applications:

• Telecom and carrier-grade -48V DC server rooms
• High-availability 1U compute clusters
• Edge data centres with DC plant power
• Redundant PSU replacements and spares management

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your deployment plan for the PWS-1K31D-1R, enabling accurate budgeting for redundant spares and rollouts. Extended warranty options up to 6 years add additional security for long-lived DC infrastructure investments.