865428-B21: HPE 800W Flex Slot Universal Hot Plug Low Halogen Power Supply Kit

Also listed as: 865428-001, 866727-001, 865427-001, DPS-800AB-36 A · made by Delta Electronics

A specialized 800-watt hot-pluggable power supply module engineered for high-voltage AC (200V-277V) and high-voltage DC (380VDC) datacenter facilities in the HPE Flexible Slot form factor. Utilizing a proprietary Saf-D-Grid power connector instead of standard IEC C13 cords, it delivers up to 94% efficiency for specialized enterprise and telecom infrastructure. On the used market, ensure the proprietary Saf-D-Grid jumper cable is included and inspect card-edge connector fingers for wear.

Specifications

About the 865428-B21

865428-B21 is HPE's 800W Flex Slot Universal Hot Plug Low Halogen Power Supply Kit. Rated for up to 94 percent electrical conversion efficiency, it is engineered specifically for specialized high-voltage enterprise datacenters operating on 277V AC commercial lighting/power grids or 380V DC high-voltage direct current (HVDC) power distribution architectures. By eliminating intermediate transformer steps between facility power and the server rack, it minimizes total energy loss while providing hot-plug N+1 redundancy in the standardized Flex Slot footprint.

Compatibility

This power supply is compatible with Flexible Slot bays across ProLiant Gen9, Gen10, and Gen10 Plus servers including the DL360, DL380, DL385, DL560, and ML350 series. IMPORTANT: This supply uses a specialized Saf-D-Grid physical receptacle; it CANNOT be connected using standard IEC C13 or C19 power cords. Installation requires an HPE Saf-D-Grid to Saf-D-Grid jumper cable (SKU J6X00A) connected to a compatible high-voltage PDU. It must be paired with another identical 800W Universal supply in redundant configurations. The option SKU is 865428-B21, with spare number 866727-001.

How to identify a genuine unit

A genuine 865428-B21 module is easily recognized by its unique rear Saf-D-Grid keyed connector rather than the standard three-prong C14 receptacle. The HPE label displays part number 865428-B21, spare number 866727-001, and input ratings stating 200V-277VAC and 380VDC support. In iLO under Power Management, the module authenticates with official HPE firmware, reporting high-voltage input telemetry and operational metrics.

Buying used

When evaluating second-hand 800W Universal supplies, always verify whether the vendor includes the mandatory Saf-D-Grid jumper cable, as acquiring this specialized cable separately is costly and time-consuming. Confirm that your facility specifically provides 277VAC or 380VDC PDU circuits, as this power supply will not function on standard 110V or 208V outlets. Inspect the rear connector prongs and card-edge contacts for physical alignment and freedom from oxidation.

Reference prices (last 12 months, updated 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 Gen10
• HPE ProLiant DL380 Gen10 Plus
• HPE ProLiant DL360 Gen10
• HPE ProLiant DL360 Gen10 Plus
• HPE ProLiant DL385 Gen10 Plus v2
• HPE ProLiant DL560 Gen10
• HPE ProLiant DL580 Gen10
• HPE ProLiant ML350 Gen10

FAQ

Sources

• HPE Flexible Slot Power Supplies QuickSpecs, checked 2026-10-27