ReplacementBatteryfortheABBAC500-3V550mAhLithium

This 3V 550mAh lithium replacement battery is a direct, form-fit-function substitute for the memory-backup battery sold under part number ABB AC500. It protects stored programs, RAM contents, and real-time clock data during power loss, and installs without rewiring, reprogramming, or controller reconfiguration.

It is used as the buffer battery for the ABB AC500 PLC family (TA521 style battery, CR2450 form factor with holder-compatible packaging), retaining program memory and the real-time clock in AC500 CPUs during power loss.

This battery cross-references to ABB 1SAP180300R0001, 4016779648950, AC500, AC500 PLC, CR2450-WC, and SAP180300R0001, plus additional part numbers, among other part numbers in the same family. Match your existing battery by part number or by the equipment it powers to confirm fit. As a lithium manganese dioxide (CR) primary cell, it combines long shelf life with a flat discharge profile. It is a primary (non-rechargeable) cell and should be replaced, not recharged, at end of life.

Technical Specifications