BA-2SBT Equivalent & Substitute Parts Reference

Part Overview

The BA-2SBT is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with screw terminal connections. This component features a 20A AC / 500mA DC current rating at 125V, utilizing an overtravel plunger actuator with On-Momentary switch function. The BA-2SBT is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations where this switch type is required.

Substiute Parts

BA-2SBT

Honeywell Sensing and Productivity SolutionsIn Stock: 1152BA-2SBT Datasheet

Current PartRFQ

GPTCRM01

ZF ElectronicsIn Stock: 1126GPTCRM01 Datasheet

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GPTCRM11

ZF ElectronicsIn Stock: 1005GPTCRM11 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BA-2SBT is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPDT topology
• Switch function: On-Momentary operation
• Voltage rating: 125V AC minimum
• Mounting interface: Chassis mount with screw terminals
• Mechanical life: 20,000,000 cycles minimum
• Operating temperature range overlap with application requirements

Substitution Logic:

The GPTCRM01 and GPTCRM11 (both ZF Electronics) are identified as equivalent substitutes based on matching SPDT circuit configuration, On-Momentary function, 125V AC voltage rating, chassis mount design, screw terminal termination, and identical 20,000,000 cycle mechanical life specification. Both substitute parts maintain RoHS compliance and MSL Level 1 rating.

Parameter Variance Considerations:

The substitute parts operate at 15A AC current rating compared to the BA-2SBT's 20A AC rating. This represents a reduction in current capacity. The substitute parts feature lever/roller actuators versus the BA-2SBT's overtravel plunger design, resulting in different operating force characteristics (158gf vs. 624-850gf) and operating position specifications (1.172" vs. 1.030"). The substitute parts operate within a narrower temperature range (0°C to 55°C) compared to the BA-2SBT (-55°C to 85°C).

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The GPTCRM01 and GPTCRM11 are active production parts from ZF Electronics with ROHS3 compliance, providing supply continuity for applications currently using the obsolete BA-2SBT. Both substitute parts maintain identical mechanical life specifications and MSL ratings.

Critical Design Considerations:

Applications requiring the full 20A AC current capacity of the BA-2SBT cannot be directly substituted with GPTCRM01 or GPTCRM11 due to their 15A AC rating limitation. The reduced operating force (158gf vs. 624-850gf) and altered actuator geometry of the substitute parts necessitate mechanical redesign of actuator interfaces and mounting fixtures. The narrower operating temperature range (0°C to 55°C) of the substitute parts restricts their use in applications requiring the BA-2SBT's extended low-temperature performance (-55°C).

Compliance Status:

Both GPTCRM01 and GPTCRM11 meet current RoHS3 compliance requirements, exceeding the RoHS compliance of the original BA-2SBT. Both parts maintain MSL Level 1 rating, consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can GPTCRM01 or GPTCRM11 directly replace BA-2SBT in existing assemblies?

A: Direct mechanical replacement is not possible due to differences in actuator type, operating force, and operating position. Mechanical redesign of mounting interfaces and actuator engagement mechanisms is required. Electrical substitution is feasible only in applications operating at 15A AC or below.

Q: What is the current rating limitation when substituting with GPTCRM01 or GPTCRM11?

A: The substitute parts are rated for 15A AC at 125V, compared to the BA-2SBT's 20A AC rating. Applications requiring current levels between 15A and 20A cannot use these substitutes without circuit redesign.

Q: Are the GPTCRM01 and GPTCRM11 interchangeable with each other?

A: Yes. Both parts share identical electrical specifications, mechanical life, operating force, temperature range, and compliance ratings. Selection between them is based on packaging and inventory availability.

Q: What temperature range limitations apply to the substitute parts?

A: GPTCRM01 and GPTCRM11 operate within 0°C to 55°C, compared to BA-2SBT's -55°C to 85°C range. Applications requiring operation below 0°C or above 55°C cannot use these substitutes.

Q: Do the substitute parts require different screw terminal specifications?

A: Both substitute parts use screw terminal termination identical to the BA-2SBT. Terminal compatibility is maintained.

Q: What is the impact of different operating force values on system design?

A: The BA-2SBT requires 624-850gf operating force versus 158gf for the substitutes. This significant reduction affects actuator design, mechanical linkage requirements, and user interface feel. Applications must be re-engineered to accommodate the lower actuation force.

Q: Are GPTCRM01 and GPTCRM11 suitable for low-temperature applications?

A: No. The 0°C minimum operating temperature of these parts excludes them from applications requiring the BA-2SBT's -55°C capability.