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782961-B21 — HP 782961-B21 HPE 12W Smart Storage Battery With Plug Connector Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 782961-B21,827350-001,87864

✓ Government record, cited
HPE · BATTERY CAPACITOR
PRODUCT OVERVIEW
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers

782961-B21: HP 782961-B21 HPE 12W Smart Storage Battery With Plug Connector Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 782961-B21,827350-001,878641-001,878642-001.

The HP 782961-B21 is a Battery-Backed Write Cache pack with a 24-inch cable, designed for HPE Smart Array controllers in ProLiant Gen8 and Gen9 servers. It provides backup power to the BBWC module during unexpected power loss, ensuring cached write data is safely committed to flash memory. This is the short-cable variant (24") designed for 1U chassis configurations.

The long-cable variant for 2U+ chassis is 660093-001 (36"). This is a high-volume replacement part in TPM market as ProLiant Gen8 and Gen9 servers remain widely deployed. This part is cataloged in the U.S.

Government catalog under NSN 6140-01-686-0212, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
782961-B21
NSN: 6140-01-686-0212
FSC: 6140 — Batteries, Rechargeable
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
Part Number782961-B21
ManufacturerHPE
NSN6140-01-686-0212
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COMPONENT DIAGRAM
CAP 72V + - CAP 72V BRACKET TO CTRL CABLE: — ~76 mm CACHE BACKUP | Supercapacitor | Cable: — Connects to RAID controller | | Controller: See controller spec SCHEMATIC: + - 2S2P SUPERCAP PACK TITLE CACHE BATT PN 782961-B21 MFR HPE HP 782961-B21 HPE 12W Smart Storage Batt
KEY FEATURES
•
Battery-Backed Write Cache Module
•
24" Cable Length
Compact cable for 1U chassis installations
•
Rechargeable Battery Technology
Provides cache backup power for 48+ hours after power loss
•
Hot-Plug Capable
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESACTION ID 45383321
PART NAME ASSIGNED BY CONTROLLING AGENCYSMART ARRAY CONTROLLER BATTERIES
OTHER ITEMS IN FSC 6140 — Batteries, Rechargeable
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6140-00-000-5725 6140-00-001-1544 6140-00-001-4187 6140-00-001-5391 6140-00-001-5392 6140-00-003-0528 6140-00-003-5310 6140-00-003-7222
SUBSTITUTES & CROSS-REFERENCES 10
881089-210Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
878641-001Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
782963-001CompatiblePARTNER
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
compatible
782963-002CompatiblePARTNER
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
compatible
782963-003CompatiblePARTNER
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
compatible
786762-001CompatiblePARTNER
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
compatible
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedDG Class 9 — LithiumRestricted Air FreightNo demilitarization required
THIS PART SUBSTITUTES FOR 8
878642-001SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
782963-001SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
782963-002SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
782963-003SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
786762-001SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
827350-001SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
871267-001SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
875240-B21SUBSTITUTE
HP Smart Array BBWC Battery Pack 12W with 24in Cable 10-Pin Plug for BL Servers
HPE
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FREQUENTLY ASKED QUESTIONS
What is 782961-B21?
782961-B21 is a HP 782961-B21 HPE 12W Smart Storage Battery With Plug Connector Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 782961-B21,827350-001,878641-001,878642-001 manufactured by HPE.
What parts can replace 782961-B21?
There are 10 known substitutes for 782961-B21: 881089-210, 878641-001, 782963-001 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 782961-B21?
782961-B21 is cataloged in the U.S. Government catalog under NSN 6140-01-686-0212. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.