654873-003 HP Battery Flashed Back Write Cache (fbwc) Capacitor Pack

654873‑003 Specifications

HPE Flash‑Backed Write Cache (FBWC) Capacitor Pack with Cable

Manufacturer: Hewlett‑Packard Enterprise (HPE)
Manufacturer Model: 654873‑003
Product Line: HPE Smart Array Accessories
Product Series: FBWC Capacitor Pack
Product Type: Flash‑Backed Write Cache (FBWC) Capacitor / Backup Power Module
Product Name: HPE FBWC Capacitor Pack with 36″ Cable

KEY FEATURES:
Device Type: Flash‑Backed Write Cache (FBWC) Capacitor Pack
Purpose: Provides backup power for Smart Array controller cache to preserve write data during power interruptions
Voltage: 5.4 V DC
Cable Length: 36 in (914 mm) included for flexible installation
Connector Type: 6‑pin connector to Smart Array controller
Backup Duration: Typically holds up cache contents long enough for flash write‑back (up to ~80 seconds depending on controller/cache size)
Component Type: Super‑capacitor battery backup module used instead of traditional long‑duration battery (FBWC technology)

PERFORMANCE & RELIABILITY:
Designed for enterprise server environments with continuous 24×7 operation and data integrity protection
Ensures cached write data is committed to storage drives if power is lost unexpectedly
RoHS compliant and built to OEM HPE quality standards

PHYSICAL:
Form Factor: Capacitor pack with integrated cable for internal controller connection
Typical Weight: Light backup module (under ~0.1 kg)

COMPATIBILITY:
Smart Array Controllers: Designed for use with HPE Smart Array P‑Series RAID controllers including P222, P420, P421, P430, B320i, P822 (and similar FBWC‑equipped models)
Server Models: Commonly used in HPE ProLiant Gen8 and Gen9 servers such as DL160 G8, DL360 p G8, DL380 p G8, DL385 p G8, DL580 G8, ML350 p G8, and others with supported Smart Array cards

CONDITION:
Often found new, refurbished, or surplus in secondary enterprise hardware channels; refurbished units are cleaned and tested for reliability.