HP 460W High Efficiency Hot-Plug AC Power Supply (503296-B21)

The HP 460W High Efficiency Hot-Plug AC Power Supply is a purpose-built, enterprise-grade power solution designed for HP ProLiant rack and tower servers. Sold under HP part numbers 503296-B21, 499250-001, 511777-001, and 536404-001, this unit is the industry standard replacement PSU for data centers and IT environments requiring maximum uptime, operational efficiency, and seamless scalability.

Unlike consumer power supplies, the HP Common Slot (CS) design allows for hot-swap, tool-less installation — meaning you can replace or add a power supply while the server remains fully operational, eliminating scheduled downtime and protecting critical workloads.

Key Features & Benefits

• 80 PLUS Gold Certified – 90%+ efficiency at typical loads, reducing electricity costs and heat output
• Hot-Plug / Hot-Swap Ready – Replace without powering down the server; zero-downtime maintenance
• 460W Output Power – Right-sized for 1U and 2U ProLiant servers running dual-processor configurations
• Universal AC Input – Accepts 100V to 240V AC at 50/60 Hz, making it globally compatible
• Common Slot Form Factor – Shares physical and electrical interface with HP’s full CS PSU lineup
• HP Power Discovery Services Compatible – Supports intelligent power management via blue-plug connector
• Tool-Less Installation – Slides directly into the Common Slot backplane with a single-hand latch release
• Redundant Power Support – Pair two units for N+1 redundancy in critical server configurations
• Quiet Operation – Integrated variable-speed fan adjusts based on thermal load

Genuine HP/HPE Quality – Manufactured to HP specifications for full iLO compatibility and warranty compliance

The HP 503296-B21 (also known as spare part 511777-001 or 536404-001) is a 460-watt, hot-pluggable AC power supply for HP ProLiant enterprise servers. Certified 80 PLUS Gold, it operates on universal 100V–240V AC input at 50/60 Hz and delivers 12V DC output at 90%+ efficiency. The common slot design enables tool-less, zero-downtime hot-swap replacement. It supports N+1 power redundancy and is compatible with HP ProLiant G6, G7, Gen8, and Gen9 server generations including DL360, DL380, DL385, DL320, ML350, and ML370 series.

Technical Specifications

Compatible HP ProLiant Server Models

This power supply is tested and verified compatible with the following HP ProLiant servers:

• DL360 G6, G7 / DL360e Gen8, DL360p Gen8
• DL380 G6, G7 / DL380e Gen8, DL380p Gen8
• DL370 G6 / DL385 G6, G7
• DL320 G6 / DL180 G6 / DL2x170h G6
• ML350 G6, G7 / ML370 G6
• DL385 G5p, G6, G7
• BL460c G6, G7 (with appropriate bay kit)

Use the HP Power Advisor tool at hp.com/go/hppoweradvisor to confirm power requirements for your specific configuration.

Why Choose the HP 460W Common Slot Gold PSU?

Data center operators and server administrators choose the HP 503296-B21 for several key reasons: First, the Common Slot architecture means a single power supply model can serve across a wide range of ProLiant platforms — reducing spare-parts inventory costs. Second, the 80 PLUS Gold efficiency rating directly lowers PUE (Power Usage Effectiveness) in the data center, cutting operational costs by up to 60W per server compared to standard-efficiency units. Third, the hot-plug design supports ITIL-compliant maintenance windows without server reboots.

For organizations running VMware ESXi, Microsoft Hyper-V, or any hypervisor-based workloads, uninterrupted power is non-negotiable. The HP 460W hot-plug PSU delivers exactly that — with the reliability backed by HP’s enterprise engineering standards.

Installation Guide (Hot-Plug Procedure)

1. Verify the server has a second occupied PSU slot or existing power supply before removal
2. Grasp the PSU handle firmly and press the release lever to disengage the latch
3. Slide the old PSU straight out of the Common Slot backplane
4. Align the new HP 460W PSU with the slot guides and slide in firmly until you hear/feel the latch click
5. Confirm the PSU LED indicator turns solid green (amber = fault, flashing = initializing)
6. Verify in iLO / HP Systems Insight Manager that the new PSU is recognized and operational