BA-2RT Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The BA-2RT is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, classified as SPDT (Single Pole Double Throw) with On-Momentary function. This component is rated for 20A AC at 125V and features a round pin plunger actuator with chassis mount configuration and screw terminal termination.

The BA-2RT is currently listed as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

BA-2RT

Honeywell Sensing and Productivity SolutionsIn Stock: 915BA-2RT Datasheet

Current PartRFQ

Z-15GW2277-B7-K

Omron Automation and SafetyIn Stock: 1029Z-15GW2277-B7-K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BA-2RT requires strict alignment with the following critical parameters:

Mandatory Matching Criteria:

• Circuit configuration: SPDT
• Switch function: On-Momentary
• Voltage rating: 125V AC minimum
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• RoHS compliance status

Allowable Variation Parameters:

• Current rating: Substitute must meet or exceed 20A AC requirement
• Actuator type: Alternative actuator designs acceptable if mechanical interface permits
• Operating temperature: Substitute range must encompass or exceed -55°C to 85°C
• Mechanical life: Substitute must meet or exceed 20,000,000 cycles

The Z-15GW2277-B7-K from Omron Automation and Safety is identified as a substitute based on matching circuit configuration (SPDT), switch function (On-Momentary), voltage rating (125V AC), mounting type (Chassis Mount), and termination style (Screw Terminal). However, this substitute exhibits reduced current rating (15A AC versus 20A AC) and narrower operating temperature range (-25°C to 80°C versus -55°C to 85°C).

Parameter Comparison

Engineering Selection Recommendations

The Z-15GW2277-B7-K represents an available substitute for the obsolete BA-2RT. Both components are RoHS compliant and maintain active manufacturing status for the Omron part, ensuring supply chain continuity.

Critical Considerations for Selection:

The Z-15GW2277-B7-K exhibits the following deviations from the BA-2RT specification:

1. Current Rating Reduction: AC current rating is 15A versus the original 20A specification. Applications requiring the full 20A AC capacity cannot use this substitute without circuit redesign.

2. DC Voltage Limitation: DC voltage rating is 30V versus 125V on the original part. DC applications at elevated voltages are not compatible.

3. Operating Temperature Narrowing: The substitute operates from -25°C to 80°C, excluding the lower temperature extreme of -55°C specified for the BA-2RT. Cold environment applications may require alternative solutions.

4. Mechanical Life Reduction: Mechanical life is rated at 10,000,000 cycles versus 20,000,000 cycles, representing a 50% reduction in cycle life expectancy.

5. Actuator Geometry Change: The lever/roller actuator differs from the round pin plunger design, requiring mechanical interface verification for panel cutout and mounting compatibility.

Selection of the Z-15GW2277-B7-K is appropriate only when application requirements fall within the reduced electrical and thermal specifications and when mechanical mounting geometry permits the alternative actuator design.

Frequently Asked Questions (FAQ)

Q: Can the Z-15GW2277-B7-K directly replace the BA-2RT in all applications?

A: No. The substitute part has reduced current rating (15A AC versus 20A AC), narrower DC voltage rating (30V versus 125V), and reduced mechanical life (10,000,000 versus 20,000,000 cycles). Direct substitution is only valid when application requirements fall within these reduced specifications.

Q: What is the primary reason the BA-2RT is listed as obsolete?

A: The BA-2RT is classified as obsolete by Honeywell. The specific reason for obsolescence is not provided in the manufacturer documentation. Substitution is necessary to maintain supply chain access for new production or maintenance applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the BA-2RT and Z-15GW2277-B7-K are RoHS compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the difference between the actuator types?

A: The BA-2RT uses a round pin plunger actuator, while the Z-15GW2277-B7-K uses a lever with roller design. These represent different mechanical interfaces and may require different panel cutout dimensions and mounting configurations. Physical compatibility must be verified for each application.

Q: Can the Z-15GW2277-B7-K handle the full 20A AC specification of the BA-2RT?

A: No. The Z-15GW2277-B7-K is rated for 15A AC at 125V. Applications requiring 20A AC capacity require alternative solutions or circuit redesign to reduce current demand.

Q: What is the operating temperature difference between these parts?

A: The BA-2RT operates from -55°C to 85°C, while the Z-15GW2277-B7-K operates from -25°C to 80°C. The substitute cannot be used in applications requiring operation below -25°C or above 80°C.

Q: Is the Z-15GW2277-B7-K available in the same packaging as the BA-2RT?

A: The Z-15GW2277-B7-K is supplied in bulk packaging, while the BA-2RT packaging specification is not detailed in the provided data. Packaging format may differ and should be verified with the supplier for procurement requirements.

Q: What is the mechanical life difference?

A: The BA-2RT is rated for 20,000,000 mechanical cycles, while the Z-15GW2277-B7-K is rated for 10,000,000 cycles. Applications with high cycle count requirements may experience reduced service life with the substitute part.