Aftermarket 1747-BA Battery – CR14250SE Equivalent for Allen-Bradley SLC-5/01 to 5/05

The Allen-Bradley 1747-BA is a 3V lithium battery designed for RAM memory retention in SLC 500 programmable logic controllers. As a primary (non-rechargeable) cell, the 1747-BA provides backup power to maintain programmed logic and data when main system power is interrupted. Aftermarket replacements for the 1747-BA are widely available from multiple suppliers, offering compatible performance at potentially lower cost than OEM-branded units.

The original 1747-BA battery is manufactured by Sanyo (now FDK) under the model designation CR14250SE. It is a cylindrical 1/2AA size cell with a nominal voltage of 3V and a typical capacity rating of 850mAh. The battery includes a three-pin connector for direct plug-in installation to SLC 500 processor modules. Aftermarket alternatives replicate this form factor and connector configuration to ensure drop-in compatibility.

Aftermarket 1747-BA batteries serve as replacements for the OEM unit across SLC 500 processor models including the 1747-L511, 1747-L514, and the SLC 5/01 through 5/05 series. The battery also cross-references with several other Allen-Bradley part numbers including 1769-BA, 1746-BAS, and A-40063-043-01, indicating compatibility across multiple PLC platforms.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	1747-BA (Aftermarket)
Original Manufacturer	Sanyo / FDK
Product Type	Lithium Battery for PLC Memory Backup
Chemistry	Lithium Thionyl Chloride (Li-SOCl₂)
Cell Size	1/2AA, CR14250, 1/2R6
Voltage	3V DC
Capacity	850mAh (Typical); Some aftermarket rated 1000-1200mAh
Rechargeable	No (Primary Cell)
Connector Type	3-Pin Plug-In with Wire Leads
Dimensions (Diameter × Height)	14.5mm × 25.0mm
Weight	Approximately 9g
Operating Temperature	-40°C to +85°C
Storage Temperature	20°C to 25°C (68°F to 77°F)
Storage Humidity	40% to 60% Relative Humidity
Shelf Life	Up to 10 Years
Compatible Controllers	SLC 5/01, 5/02, 5/03, 5/04, 5/05, 1747-L511, 1747-L514

Main Features and Advantages

The aftermarket 1747-BA battery delivers essential memory backup functionality for SLC 500 PLC systems, with several characteristics that make it a practical replacement option.

Direct Drop-In Compatibility: Aftermarket 1747-BA replacements are manufactured to match the original 1/2AA form factor with a 3-pin connector identical to the OEM configuration. This ensures direct plug-in installation to SLC 500 processor modules without modification, reducing downtime during battery replacement. The cylindrical cell dimensions of approximately 14.5mm diameter and 25mm height match the original specification.

Cross-Platform Interchangeability: The 1747-BA aftermarket battery cross-references with multiple Allen-Bradley part numbers, including 1769-BA, 1746-BAS, and A-40063-043-01. This interchangeability simplifies inventory management for facilities operating mixed PLC platforms, as a single battery type can serve multiple controller models.

Extended Shelf Life: Lithium thionyl chloride chemistry provides the 1747-BA with a shelf life of up to 10 years under proper storage conditions. Low self-discharge characteristics ensure that stored batteries retain capacity for extended periods, making them suitable for spare parts inventory management. Storage in cool, dry conditions at 20-25°C with 40-60% humidity preserves battery performance.

Reliable Low-Drain Performance: The 1747-BA is optimized for the low continuous current drain characteristic of memory backup applications. The original CR14250SE cell delivers approximately 7mA maximum continuous discharge current, sufficient for RAM retention in SLC 500 controllers. Aftermarket alternatives maintain similar discharge characteristics to ensure reliable backup throughout the battery’s service life.