Mitsubishi GB250H-3F Battery Unit

Technical Dossier

Product Details And Specifications

Mitsubishi Electric GB250H Series Technical Notes

The Mitsubishi Electric GB250H Series represents the dedicated battery backup and power retention module line developed for Mitsubishi's MELSEC programmable logic controller (PLC) and distributed control system (DCS) platforms. These units are deployed globally across heavy industrial sectors including petrochemical refineries, nuclear power auxiliary systems, offshore platforms, steel mills, and continuous-process chemical plants where RAM data retention and clock backup during power interruption are non-negotiable operational requirements. The GB250H-3F and its series siblings are designed to interface directly with Mitsubishi MELSEC Q-series, A-series, and compatible CPU backplane slots, providing lithium-cell-based backup power to retain program memory, device data, and real-time clock registers during mains power loss events. Installed base across Asia-Pacific, Middle East, and European heavy industry makes this series one of the most frequently sourced battery replacement components in the Mitsubishi spare parts ecosystem.

GB250H Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Mitsubishi Electric GB250H / MELSEC battery and backup power module range. Each entry reflects a distinct part number with defined functional scope:

GB250H-3F: 3-cell lithium battery unit for MELSEC CPU RAM/RTC backup, extended service life
Q6BAT: Standard lithium battery for Q-series CPU modules, 3.6V primary cell
Q7BAT: High-capacity battery for Q-series large-memory CPU modules
Q8BAT: Battery cassette for Q-series redundant CPU configurations
A6BAT: Lithium battery for MELSEC A-series CPU modules (legacy)
A7BAT: Extended-capacity battery for A-series large-memory CPUs (legacy)
MR-BAT: Lithium battery for MELSERVO MR-J series servo amplifier absolute encoder backup
MR-BAT6V1SET: 6V lithium battery set for MR-J4/J5 series absolute position retention
ER6V/3.6V: Thionyl chloride lithium cell used in multiple MELSEC battery holders
Q170MCPU-BAT: Dedicated battery for Motion CPU Q170M series
Q172DCPU-BAT: Battery module for Q172D motion controller CPU
FX3U-32BL: Battery holder with lithium cell for MELSEC FX3U series CPU
FX-BAT: Replacement lithium battery for FX0/FX1/FX2 series CPU memory backup
GT15-BAT: Battery for GOT1000 series GT15 HMI panel RTC and backup
GT11-50BAT: Compact lithium battery for GOT1000 GT11 panel series
Q6DIN1: DIN rail adapter used in conjunction with Q-series battery module mounting
BKO-C10811H03: Mitsubishi CNC system battery for MELDAS series controller backup
MDS-B-BAT: Battery unit for MDS-B series CNC drive system absolute position memory