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405836-001 ✓ Verified by PartsTable
HP · CONTROLLER · RAID_CACHE
WHAT YOU NEED TO KNOW
RAID cache modules — check if the battery is included and verify cache size. Ship unlocked and with test reports. Firmware must match the server. Key checks: Ship with test reports. Ship UNLOCKED.
Firmware must match server
PRODUCT OVERVIEW
HP 256MB CACHE FOR HP P400

The HP 405836-001 is a Battery-Backed Write Cache pack, 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 a high-volume replacement part in TPM market as ProLiant Gen8 and Gen9 servers remain widely deployed.

WHERE IT FITS
CONTROLLER RAID_CACHE 405836-001
SPECIFICATIONS
Part Number405836-001
ManufacturerHP
Capacity256MB
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 405836-001 MFR HP HP 256MB Cache for HP P400
KEY FEATURES
Battery-Backed Write Cache Module
Rechargeable Battery Technology
Provides cache backup power for 48+ hours after power loss
Hot-Plug Capable
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
405139-B21Compatible
HP Smart Array BBWC 256Mb Cache Module for P400
compatible
012764-004Compatible
HP Smart Array BBWC 256Mb Cache Module for P400
compatible
013126-000Compatible
HP Smart Array BBWC 256Mb Cache Module for P400
compatible
405140-B21Compatible
HP Smart Array BBWC 256Mb Cache Module for P400
compatible
LIFECYCLE
StatusUNKNOWN
Availability
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 4
012764-004SUBSTITUTE
HP Smart Array BBWC 256Mb Cache Module for P400
HPE
013126-000SUBSTITUTE
HP Smart Array BBWC 256Mb Cache Module for P400
HPE
405140-B21SUBSTITUTE
HP Smart Array BBWC 256Mb Cache Module for P400
HPE
405139-B21SUBSTITUTE
HP Smart Array BBWC 256Mb Cache Module for P400
HPE
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FREQUENTLY ASKED QUESTIONS
What is 405836-001?
405836-001 is a HP 256MB Cache for HP P400 manufactured by HP. It is classified as a CONTROLLER (RAID_CACHE).
What parts can replace 405836-001?
There are 4 known substitutes for 405836-001: 405139-B21, 012764-004, 013126-000 and 1 more. Substitute compatibility should be verified for your specific system.
Is 405836-001 still available?
405836-001 is currently Unknown.
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