BA-2RB-A2 Equivalent & Substitute Parts Reference

Part Overview

The BA-2RB-A2 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This panel mount switch is rated for 20A AC at 125V and features an overtravel plunger actuator with screw terminal connections. The part is Active status and RoHS Compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the BA-2RB-A2 becomes unavailable, when alternative mounting configurations are required, or when application-specific electrical ratings necessitate different current or voltage specifications. The substitute parts listed maintain SPDT circuit configuration and On-Mom switch function while offering variations in electrical ratings, actuator types, and mounting styles.

Substiute Parts

BA-2RB-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 847BA-2RB-A2 Datasheet

Current PartRFQ

A-20GQ21-B

Omron Automation and SafetyIn Stock: 1083A-20GQ21-B Datasheet

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X-10G-B

Omron Automation and SafetyIn Stock: 1146X-10G-B Datasheet

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Z-15GS-B

Omron Automation and SafetyIn Stock: 1139Z-15GS-B Datasheet

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Z-15HW2-B

Omron Automation and SafetyIn Stock: 767Z-15HW2-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BA-2RB-A2 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Mom
• Termination style must be Screw Terminal
• RoHS compliance status must be maintained

Secondary Compatibility Criteria (Application-Dependent):

• Current rating (AC/DC) must meet or exceed application requirements
• Voltage rating (AC/DC) must meet or exceed application requirements
• Operating temperature range must encompass application environment
• Mechanical life must support application cycle requirements

Substitution Constraints:

• Mounting type variations (Panel Mount vs. Chassis Mount) affect physical installation but do not prevent electrical substitution
• Actuator type variations (Overtravel Plunger vs. Roller Plunger vs. Round Pin Plunger vs. Lever/Roller) affect mechanical operation but maintain SPDT functionality
• Ingress Protection rating differences do not affect core electrical substitution capability

The four substitute parts listed (A-20GQ21-B, X-10G-B, Z-15GS-B, Z-15HW2-B) maintain SPDT circuit and On-Mom function but vary in electrical ratings, actuator configurations, and mounting styles.

Parameter Comparison

Engineering Selection Recommendations

A-20GQ21-B (Omron Automation and Safety)

The A-20GQ21-B maintains panel mount configuration and 20A AC / 125V AC ratings identical to the BA-2RB-A2. This part is the closest functional equivalent for applications requiring panel mount installation. The A-20GQ21-B features a roller plunger actuator and provides 6A DC at 30V DC, which exceeds the BA-2RB-A2's 500mA DC rating. Mechanical life is 1,000,000 cycles, lower than the BA-2RB-A2's 20,000,000 cycles. Operating temperature range is -25°C to 80°C, narrower than the BA-2RB-A2. RoHS Compliant status is maintained. Select this part when panel mount configuration is required and application does not demand the extended temperature range or high mechanical cycle count of the main part.

Z-15GS-B (Omron Automation and Safety)

The Z-15GS-B provides 15A AC / 125V AC ratings and maintains 20,000,000 cycle mechanical life matching the BA-2RB-A2. This part features chassis mount configuration and round pin plunger actuator. DC ratings are 6A at 30V. Operating temperature range is -25°C to 80°C. ROHS3 Compliant status is maintained. Select this part when chassis mount installation is acceptable, AC current requirement is 15A or less, and mechanical life requirement of 20,000,000 cycles is critical.

Z-15HW2-B (Omron Automation and Safety)

The Z-15HW2-B provides 15A AC / 125V AC ratings and maintains 20,000,000 cycle mechanical life. This part features chassis mount configuration with lever and roller actuator combination. DC rating is 2A at 30V, lower than the BA-2RB-A2. Operating temperature range is -25°C to 80°C. RoHS Compliant status is maintained. Select this part when chassis mount installation is acceptable, AC current requirement is 15A or less, mechanical life requirement of 20,000,000 cycles is critical, and low operating force (86gf) is advantageous.

X-10G-B (Omron Automation and Safety)

The X-10G-B provides 10A DC at 30V DC with chassis mount configuration and round pin plunger actuator. This part has the lowest current and voltage ratings among substitutes and is suitable only for DC applications with 10A or lower current requirements. Mechanical life is 1,000,000 cycles. Operating temperature range is -25°C to 80°C. ROHS3 Compliant status is maintained. Select this part only when application is DC-only with current not exceeding 10A and chassis mount configuration is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the A-20GQ21-B directly replace the BA-2RB-A2 in all applications?

A: The A-20GQ21-B is electrically compatible for AC applications at 20A / 125V and maintains panel mount configuration. However, the operating temperature range is narrower (-25°C to 80°C vs. -55°C to 85°C), and mechanical life is lower (1,000,000 vs. 20,000,000 cycles). Verify that your application does not require the extended temperature range or high cycle count before substitution.

Q: What is the primary difference between the Z-15GS-B and Z-15HW2-B?

A: Both parts provide 15A AC / 125V AC ratings and 20,000,000 mechanical life with chassis mount configuration. The Z-15GS-B features a round pin plunger actuator with 250-350gf operating force, while the Z-15HW2-B features a lever and roller actuator with 86gf operating force. The Z-15HW2-B has lower DC current rating (2A vs. 6A). Select based on actuator type preference and DC current requirements.

Q: Why is the X-10G-B listed as a substitute if it has lower ratings?

A: The X-10G-B is listed as a substitute for applications where DC operation at 10A or lower is required and chassis mount configuration is acceptable. It maintains SPDT circuit, On-Mom function, and screw terminal termination. It is not suitable for AC applications or applications requiring current above 10A DC.

Q: Are all substitute parts RoHS compliant?

A: Yes. The BA-2RB-A2, A-20GQ21-B, and Z-15HW2-B are RoHS Compliant. The Z-15GS-B and X-10G-B are ROHS3 Compliant. All parts meet RoHS requirements and are suitable for applications with RoHS compliance mandates.

Q: What is the impact of mounting type differences on substitution?

A: The BA-2RB-A2 is panel mount while Z-15GS-B, Z-15HW2-B, and X-10G-B are chassis mount. Mounting type affects physical installation method but does not affect electrical circuit operation. Substitution is electrically valid, but mechanical installation must be verified for your specific enclosure or panel design.

Q: Can I use a substitute part rated for lower mechanical life in a high-cycle application?

A: No. If your application requires 20,000,000 mechanical cycles, select only Z-15GS-B or Z-15HW2-B. The A-20GQ21-B and X-10G-B are rated for 1,000,000 cycles and will not meet high-cycle requirements.

Q: What is the significance of the different actuator types?

A: Actuator type affects the mechanical feel and force required to operate the switch. The BA-2RB-A2 uses overtravel plunger (397-624gf operating force), A-20GQ21-B uses roller plunger (630gf), Z-15GS-B uses round pin plunger (250-350gf), and Z-15HW2-B uses lever and roller (86gf). Select based on your application's mechanical actuation requirements and available operating force.

Q: Are there temperature limitations I should consider when substituting?

A: Yes. The BA-2RB-A2 operates from -55°C to 85°C. All substitute parts operate from -25°C to 80°C, which is a narrower range. If your application requires operation below -25°C or above 80°C, the BA-2RB-A2 is the only suitable option among these parts.