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Technical Data Sheet
PartsTable / CONTROLLER / A2256-14
A2256-14 ✓ Verified by PartsTable
— · 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

The the manufacturer A2256-14 is a Battery-Backed Write Cache pack, designed for enterprise RAID controllers in enterprise 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 enterprise servers remain widely deployed.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-158-6190, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
CONTROLLER→ RAID_CACHE→ A2256-14
NSN: 3110-00-158-6190
FSC: 3110
CAGE: 00656 — AEROVOX CORP. (USA)
SPECIFICATIONS
materialCOPPER ALLOY RETAINER
alignment_typeRIGID
overall_height0.8070 INCHES NOMINAL IN
surface_finishGROUND
special_featuresBRONZE FERRULE ON ID OF ONE WASHER,WASHERS OVERLAP
style_designatorCLUTCH RELEASE, THRUST, LUBRICATED AND SEALED
bore_smallest_diameter2.0625 INCHES MINIMUM AND 2.0635 INCHES MAXIMUM IN
overall_outside_diameter3.4850 INCHES MINIMUM AND 3.5150 INCHES MAXIMUM IN
thrust_directional_capability_designationSINGLE
NSN3110-00-158-6190
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 A2256-14 MFR OEM IBM SAS 6Gb 3-Port PCIe2 x8 1.5GB Cache
KEY FEATURES
•
Battery-Backed Write Cache Module
•
Rechargeable Battery Technology
Provides cache backup power for 48+ hours after power loss
•
Hot-Plug Capable
TYPICAL APPLICATIONS
  • Hardware RAID acceleration for enterprise storage
  • Data protection and parity management
  • Cache-backed write acceleration
  • Storage tiering and SSD caching
TECHNICAL CHARACTERISTICS (FLIS)
ALIGNMENT TYPERIGID
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
SURFACE FINISHGROUND
OVERALL OUTSIDE DIAMETER3.4850 INCHES MINIMUM AND 3.5150 INCHES MAXIMUM IN
SPECIAL FEATURESBRONZE FERRULE ON ID OF ONE WASHER,WASHERS OVERLAP
BORE SMALLEST DIAMETER2.0625 INCHES MINIMUM AND 2.0635 INCHES MAXIMUM IN
OVERALL HEIGHT0.8070 INCHES NOMINAL IN
MATERIALCOPPER ALLOY RETAINER
STYLE DESIGNATORCLUTCH RELEASE, THRUST, LUBRICATED AND SEALED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
1087Interchangeable
interchangeable cross-reference
interchangeable
301803R91Interchangeable
interchangeable cross-reference
interchangeable
7524043Interchangeable
interchangeable cross-reference
interchangeable
44Z1233D1Interchangeable
interchangeable cross-reference
interchangeable
4506Interchangeable
interchangeable cross-reference
interchangeable
E2265PC54Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A2256-14?
A2256-14 is a IBM SAS 6Gb 3-Port PCIe2 x8 1.5GB Cache RAID Adapter. It is classified as a CONTROLLER (RAID_CACHE).
What parts can replace A2256-14?
There are 25 known substitutes for A2256-14: 1087, 301803R91, 7524043 and 22 more. Substitute compatibility should be verified for your specific system.
Is A2256-14 still available?
A2256-14 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026