BZ-2RQ181-A2 Equivalent & Substitute Parts

Part Overview

The BZ-2RQ181-A2 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This panel mount switch is designed for applications requiring 15A AC at 125V with momentary on-off functionality and roller plunger actuation. The part is currently active in production with 983 units in stock. Equivalent and substitute parts are identified when circuit configuration, voltage ratings, mounting type, and termination style align with application requirements, allowing for component interchangeability in compatible system designs.

Substiute Parts

BZ-2RQ181-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 1071BZ-2RQ181-A2 Datasheet

Current PartRFQ

A-20GQ-B

Omron Automation and SafetyIn Stock: 713A-20GQ-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2RQ181-A2 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Mom (momentary)
• Mounting type must be Panel Mount
• Termination style must be Screw Terminal
• Voltage rating (AC) must support 125V minimum
• Current rating (AC) must support 15A minimum

Secondary Compatibility Considerations:

• Operating temperature range should encompass application requirements
• Actuator type may vary (roller plunger, overtravel plunger, etc.) provided mechanical interface is compatible
• Mechanical life cycle rating should meet or exceed application duty cycle

The substitute part A-20GQ-B meets the primary compatibility criteria with SPDT circuit, On-Mom function, panel mount configuration, and screw terminal termination. The A-20GQ-B provides higher AC current rating (20A) and maintains 125V AC voltage compatibility. Differences in actuator type, operating force, and mechanical life must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the BZ-2RQ181-A2 and A-20GQ-B are active production parts with RoHS compliance certification, suitable for applications requiring regulatory adherence. Selection between these parts depends on specific application parameters not addressed by substitution criteria alone.

The BZ-2RQ181-A2 provides extended operating temperature range (-55°C to 85°C) and significantly higher mechanical life rating (20,000,000 cycles), making it suitable for demanding industrial environments with extended service life requirements or extreme temperature exposure.

The A-20GQ-B offers higher AC current capacity (20A versus 15A) and higher DC current capacity (6A versus 500mA), providing margin for applications with elevated current demands. However, the A-20GQ-B has a narrower operating temperature range (-25°C to 80°C) and lower mechanical life rating (1,000,000 cycles).

Both parts maintain identical AC voltage rating (125V) and panel mount screw terminal configuration, ensuring mechanical and electrical interface compatibility in standard panel-mounted switch applications.

Frequently Asked Questions (FAQ)

Q: Can the A-20GQ-B directly replace the BZ-2RQ181-A2 in all applications?

A: The A-20GQ-B is electrically and mechanically compatible for applications operating within -25°C to 80°C temperature range and requiring up to 1,000,000 mechanical cycles. Applications requiring extended temperature operation below -25°C or exceeding 1,000,000 cycles require the BZ-2RQ181-A2.

Q: What are the key differences in electrical ratings?

A: The A-20GQ-B provides higher AC current capacity (20A versus 15A) and higher DC current capacity (6A versus 500mA). However, the A-20GQ-B DC voltage rating is limited to 30V compared to the BZ-2RQ181-A2 rating of 125V DC. AC voltage rating remains identical at 125V for both parts.

Q: Are both parts suitable for panel mount installation?

A: Yes. Both the BZ-2RQ181-A2 and A-20GQ-B are panel mount switches with screw terminal termination, providing identical mounting interface compatibility.

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

A: The BZ-2RQ181-A2 uses roller plunger actuation while the A-20GQ-B uses overtravel plunger actuation. Both actuator types provide momentary on-off function. Actuator type selection depends on mechanical interface requirements and actuation force characteristics specific to the application.

Q: Which part should be selected for high-cycle applications?

A: The BZ-2RQ181-A2 is specified for 20,000,000 mechanical cycles, suitable for high-cycle applications. The A-20GQ-B is rated for 1,000,000 mechanical cycles and is appropriate for moderate-cycle applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the BZ-2RQ181-A2 and A-20GQ-B carry RoHS compliance certification.