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660091-001 ✓ Verified by PartsTable
HPE · TRANSCEIVER · POWER_CABLE
WHAT YOU NEED TO KNOW
Short-cable variant for 1U chassis. ⚠ Always confirm cable length matches chassis depth.
CABLE LENGTH IS CRITICAL: 660093-001 = 36" (2U+), 654873-003 = 24" (1U)
PRODUCT OVERVIEW
Flash-backed write cache (FBWC) capacitor cable pack - Includes 30cm (12in) long cable

The HP 660091-001 is a Flash-Backed Write Cache capacitor pack with a 12-inch cable, designed for HPE Smart Array controllers in ProLiant Gen8 and Gen9 servers. It provides backup power to the FBWC module during unexpected power loss, ensuring cached write data is safely committed to flash memory. Unlike traditional batteries, the supercapacitor design offers a longer operational lifespan with no scheduled replacement cycles and no temperature-related degradation.

This is the short-cable variant (12") 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.

WHERE IT FITS
TRANSCEIVER→ POWER_CABLE→ 660091-001
SPECIFICATIONS
Part Number660091-001
Option PN654873-003
ManufacturerHewlett Packard Enterprise
TypeFBWC Capacitor Pack
Cable Length609mm (24 inches)
Connector8-pin proprietary
TechnologySupercapacitor (EDLC)
Voltage3.7V nominal
Hold Time>60 seconds
Operating Temp0–55°C
Dimensions95 × 40 × 22mm
COMPONENT DIAGRAM
CAP 72V + - CAP 72V BRACKET TO CTRL CABLE: 609mm ~76 mm CACHE BACKUP | Supercapacitor | Cable: 609mm Connects to RAID controller | | Controller: See controller spec SCHEMATIC: + - 2S2P SUPERCAP PACK TITLE CACHE BATT PN 660091-001 MFR HPE HPE FBWC Capacitor Pack with 609mm (24")
KEY FEATURES
•
Flash-Backed Write Cache Capacitor
Replaces battery in Gen8/Gen9 FBWC designs
•
609mm (24") Cable Length
Compact cable for 1U chassis installations
•
Supercapacitor Technology
No degradation over time vs. lithium battery
•
Hot-Plug Capable
•
No Maintenance Required
No temperature monitoring, no replacement cycles
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
660093-001VARIANT
Same capacitor, LONG cable (36"/914mm). For 2U+ chassis.
Drop-in identical
654873-001Compatible
HP Smart Array FBWC Capacitor Pack with 12in Cable 6-Pin Plug
compatible
668943-B21Compatible
HP Smart Array FBWC Super Capacitor Pack with 12in Cable
compatible
LIFECYCLE
StatusACTIVE
SuccessorP01366-B21 (Gen10)
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 2
654873-001SUBSTITUTE
HP Smart Array FBWC Capacitor Pack with 12in Cable 6-Pin Plug
HPE
668943-B21SUBSTITUTE
HP Smart Array FBWC Capacitor Pack with 12in Cable 6-Pin Plug
HPE
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FREQUENTLY ASKED QUESTIONS
What is 660091-001?
660091-001 is a HPE FBWC Capacitor Pack with 609mm (24") Cable manufactured by HPE. It is classified as a TRANSCEIVER (POWER_CABLE).
What systems is 660091-001 compatible with?
660091-001 is compatible with DL360 Gen8/9, DL160 Gen8/9, DL320e Gen8. Always verify compatibility with your specific configuration before ordering.
What parts can replace 660091-001?
There are 3 known substitutes for 660091-001: 660093-001, 654873-001, 668943-B21. Substitute compatibility should be verified for your specific system.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026