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Technical Data Sheet
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761874-B21 ✓ Verified by PartsTable
HPE · RAID CONTROLLER
WHAT YOU NEED TO KNOW
Naming: -i=Internal | -e=External | -a=Type-a modular | -c=Mezzanine SR=SmartRAID (cache) | E=Entry (no cache, HBA-like)
Smart Storage Battery SOLD SEPARATELY — no battery = no write-back cache
PRODUCT OVERVIEW

The HP 761874-B21 HPE Smart Array P840/4GB with battery Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 726897-B21,761874-B21,761880-001 is a HPE cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-641-3870, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
761874-B21
NSN: 5998-01-641-3870
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
Part Number761874-B21
ManufacturerHPE
Capacity4GB
NSN5998-01-641-3870
COMPONENT DIAGRAM
RAID ASIC CACHE FBWC SAS 0 SAS 1 SAS 2 SAS 3 BATT EXT 0 EXT 1 PCIe x8 ~187 mm STORAGE CONTROLLER | RAID 0,1,5,6,10 | PCIe SAS/SATA | FBWC cache | Battery backup connector | TITLE RAID CTRL PN 761874-B21 MFR HPE HP 761874-B21 HPE Smart Array P840/4GB w
KEY FEATURES
•
4GB Capacity
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 (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYSTORAGE CONTROLLER (RAID)
END ITEM IDENTIFICATIONTOWER SERVER
PART NAME ASSIGNED BY CONTROLLING AGENCYSTORAGE CONTROLLER (RAID)
END ITEM IDENTIFICATIONTOWER SERVER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
761874-B21Interchangeable
HP 761874-B21 HPE Smart Array P840/4GB with battery Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 726897-B21,761874-B21,761880-001
interchangeable
761880-001Interchangeable
HP Smart Array P840 12Gbps PCIE 2P SCSI RAID Controller Card
interchangeable
726897-B21Compatible
HP Smart Array P840/4Gb FBWC 12G 2-Port Int PCI-E 3.0x8 SAS Controller
compatible
784486-001Compatible
HP Smart Array P840/4Gb FBWC 12G 2-Port Int PCI-E 3.0x8 SAS Controller
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
726897-B21SUBSTITUTE
HP Smart Array P840/4Gb FBWC 12G 2-Port Int PCI-E 3.0x8 SAS Controller FIO
HPE
761880-001SUBSTITUTE
HP Smart Array P840/4Gb FBWC 12G 2-Port Int PCI-E 3.0x8 SAS Controller FIO
HPE
784486-001SUBSTITUTE
HP Smart Array P840/4Gb FBWC 12G 2-Port Int PCI-E 3.0x8 SAS Controller FIO
HPE
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FREQUENTLY ASKED QUESTIONS
What is 761874-B21?
761874-B21 is a HP 761874-B21 HPE Smart Array P840/4GB with battery Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: 726897-B21,761874-B21,761880-001 manufactured by HPE.
What parts can replace 761874-B21?
There are 4 known substitutes for 761874-B21: 761874-B21, 761880-001, 726897-B21 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 761874-B21?
761874-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-641-3870. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026