720479-B21: HPE 800W Flex Slot Platinum Hot Plug Power Supply
Also listed as: 754378-001, 866730-001, 723595-101, DPS-800AB-13 A · made by Delta
The HPE 720479-B21 is an 800W Flex Slot Platinum hot-plug power supply engineered for compute-heavy and storage-dense HPE ProLiant Gen9 servers. Delivering 80 PLUS Platinum efficiency up to 94%, it provides ample headroom for dual high-wattage Xeon processors, multiple PCIe accelerator cards, and full drive cage complements.
Specifications
| Part number | 720479-B21 |
|---|---|
| Brand | HPE |
| Made by | Delta |
| Type | Power supplies |
| Other numbers | 754378-001, 866730-001, 723595-101, DPS-800AB-13 A |
| Status | end of sale |
| Wattage | 800 |
| Efficiency | 80 PLUS Platinum (up to 94% efficiency) |
| Form factor | HPE Flexible Slot (Flex Slot) |
| Input voltage | 100V - 240V AC |
| Hot pluggable | Yes |
| Redundancy | 1+1 redundant support |
About the 720479-B21
720479-B21 is the HPE 800W Flex Slot Platinum hot-plug power supply unit for ProLiant Gen9 servers. Offering high power density and 80 PLUS Platinum electrical efficiency up to 94%, it allows high-spec multi-processor servers with expanding PCIe and drive footprints to operate with full 1+1 redundant power protection.
Compatibility
Compatible with all HPE ProLiant Gen9 servers supporting Flex Slot power supplies, including DL380 Gen9, DL360 Gen9, DL560 Gen9, ML350 Gen9, Apollo 4200 Gen9, and SimpliVity 380 Gen9. Also fully compatible with select Gen10 server configurations requiring 800W power supplies.
How to identify a genuine unit
Silver sheet metal enclosure with a black molded extraction handle, blue release latch, and standard C14 receptacle. Product label displays option part number 720479-B21, spare part number 754378-001 or 866730-001, and assembly part number 723595-101.
Buying used
Inspect the gold card-edge power contacts for physical gouging, pitting, or carbon buildup. Check that the extraction lever and retention latch operate smoothly. Confirm in iLO 4 that power telemetry, temperature sensors, and redundancy states report healthy values.
Reference prices (last 12 months, updated 2026-10-27)
Used: USD 28 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| ebay.com | used | USD 28 | Tested working HPE 800W Platinum Flex Slot PSU | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
- HPE ProLiant DL380 Gen9
- HPE ProLiant DL360 Gen9
- HPE ProLiant DL560 Gen9
- HPE ProLiant ML350 Gen9
- HPE Apollo 4200 Gen9
- HPE SimpliVity 380 Gen9
Check compatibility with HPE
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that HPE has tested with the HPE 720479-B21.
- Compatibility HPE SPOCK (storage, SAN and host compatibility)
- Part lookup HPE PartSurfer (spare and option part numbers)
- Support HPE Support Center
Equivalent part numbers
- Dell D250E-S0 Dell 750W EPP Hot Plug Power Supply
FAQ
Is 720479-B21 sufficient for dual 145W Xeon processors and 24 drives?
Yes, dual 800W PSUs in 1+1 redundant mode easily power fully configured DL380 Gen9 servers with high-TDP CPUs and 24 SFF SAS drives.
What power cord is used with the 800W Flex Slot PSU?
The module features a standard IEC 60320 C14 inlet socket compatible with standard C13 to C14 PDU jumper cords or country-specific wall cords.
Buying or selling 720479-B21?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- HPE ProLiant DL380 Gen9 Server QuickSpecs - Core Options, checked 2026-10-27