[ POWER CONVERSION // IDENTIFIED MODEL ]
HPE 500 W Flex Slot Platinum PSU (720478-B21)
HPE 500 W Flex Slot Platinum hot-plug power supply option 720478-B21. This entry covers the specific model or bounded historical system assembly identified here; suffixes and supplier revisions are not presumed equivalent.
HIGH-VOLTAGE SAFETY: Disconnect mains before external inspection. Never open a PSU. Internal capacitors can retain dangerous charge after disconnection. Do not probe or repair its interior; use qualified service or replace it.
Model-specific ratings & fit
| Manufacturer identity | HPE 500 W Flex Slot Platinum hot-plug power supply option 720478-B21 |
|---|---|
| Form factor / generation | Flex Slot server PSU, 500 W Platinum |
| AC input | 100–240 V AC, 50/60 Hz; output and current by input line/platform qualification. |
| DC output | 500 W output class; nominal +12 V main bus and standby rail per specific HPE model data sheet; use exact label for current table. |
| Dimensions / mounting | HPE Flex Slot hot-plug sled, qualified host chassis required. |
| Connectors | IEC inlet and HPE Flex Slot blind-mate connector; not an ATX PSU. |
| Revision distinctions | 720478-B21 is 500 W Platinum Flex Slot option, distinct from HPE 800/1600 W modules and other common-slot generations. |
Compatibility & safe handling
- Verify full model, suffix, region and revision using the actual unit nameplate and matching manufacturer manual. Wattage and plug shape alone do not establish compatibility.
- Check AC input range, rail and combined output limits, derating, signaling/pinout, cooling direction, mounting and system qualification before installation.
- PSU modular-side cables are model-specific. Never reuse an unapproved lead; a matching plug can carry a different pinout.
- Server hot-plug is permitted only in qualified host configurations and under the host’s documented redundancy/live-service procedure.
- Never open or internally probe the supply. Retire damaged, wet, burnt, corroded, modified or unidentified units.
Revision & archival notes
720478-B21 is 500 W Platinum Flex Slot option, distinct from HPE 800/1600 W modules and other common-slot generations.
Preserve option number, spare number and platform QuickSpecs; verify redundancy/slot support and installation procedure.
Photograph the full nameplate, model/FRU, supplier, revision/date code, line selector, cable ends, mounting orientation and source-document issue. Keep observed label data separate from test results.
Manufacturer or primary references
- HPE 500 W Flex Slot Platinum PSU (720478-B21) — manufacturer/product or primary technical referenceHPE 500 W Flex Slot Platinum hot-plug power supply option 720478-B21. Check the exact revision, region and system support information. Original page is gone; this is the Internet Archive’s copy.
- Intel ATX / ATX12V Power Supply Design GuideReference for desktop ATX context only. Proprietary historical and hot-swap server outputs are not made interchangeable by ATX standards.
The specific PSU nameplate and corresponding model/service documentation remain controlling.