BZ-2R72-A2 Equivalent & Substitute Parts Reference

Part Overview

The BZ-2R72-A2 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 1A AC at 125V with a round pin plunger actuator and screw terminal connections. The product is Active status with RoHS compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical ratings, circuit configuration, and mechanical mounting compatibility align with application requirements.

Substiute Parts

BZ-2R72-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 899BZ-2R72-A2 Datasheet

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Z-15GD55-B

Omron Automation and SafetyIn Stock: 392146Z-15GD55-B Datasheet

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Z-15GM2255-B

Omron Automation and SafetyIn Stock: 1077Z-15GM2255-B Datasheet

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Z-15GW22-B

Omron Automation and SafetyIn Stock: 3688Z-15GW22-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZ-2R72-A2 are identified based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Circuit configuration: SPDT (Single Pole Double Throw)
• Switch function: On-Mom (On-Momentary)
• Voltage rating: 125V AC minimum
• Mounting type: Chassis Mount
• Termination style: Screw Terminal

Substitution Logic: The three identified substitute parts (Z-15GD55-B, Z-15GM2255-B, Z-15GW22-B) all share the core SPDT circuit configuration, On-Mom function, 125V AC rating, chassis mount design, and screw terminal connections. These parts are manufactured by Omron Automation and Safety and maintain compatibility with the electrical and mechanical interface requirements of the BZ-2R72-A2 application space.

Current Rating Consideration: The substitute parts are rated for 15A AC (6A DC), which exceeds the 1A AC rating of the main part. This higher current capacity does not prevent substitution in applications requiring 1A or less, as the substitute parts operate within their specified limits at lower current levels.

Parameter Comparison

Engineering Selection Recommendations

Z-15GD55-B Selection Criteria: This substitute maintains round pin plunger actuator design identical to the BZ-2R72-A2. ROHS3 compliance and REACH Unaffected status apply. Ingress protection rating IP62 provides enhanced environmental sealing. Mechanical life of 20,000,000 cycles matches the main part. Operating temperature range of -15°C to 80°C is narrower than the main part's -55°C to 85°C range. Electrical life rating of 500,000 cycles is specified. Tray packaging differs from bulk packaging of the main part.

Z-15GM2255-B Selection Criteria: This substitute features lever and roller actuator design, differing from the round pin plunger of the main part. ROHS3 compliance applies with REACH Affected status. Ingress protection rating IP62 is specified. Mechanical life of 10,000,000 cycles is lower than the main part. Operating temperature range of -15°C to 80°C is narrower. Electrical life rating of 500,000 cycles is specified. Bulk packaging matches the main part. Pretravel specification is not provided.

Z-15GW22-B Selection Criteria: This substitute features lever and roller actuator design with the lowest operating force (160gf) among all options. ROHS3 compliance applies with REACH Unaffected status. Ingress protection rating IP00 indicates no environmental sealing. Mechanical life of 10,000,000 cycles is lower than the main part. Operating temperature range of -25°C to 80°C extends lower temperature capability compared to other substitutes but remains above the main part's -55°C minimum. Electrical life rating of 500,000 cycles is specified. Tray packaging differs from bulk packaging of the main part.

Compliance Basis: All substitute parts maintain RoHS compliance (ROHS3 standard) and MSL 1 rating. Selection between substitutes depends on specific application requirements regarding actuator type, environmental sealing, temperature range, and packaging format.

Frequently Asked Questions (FAQ)

Q: Can Z-15GD55-B, Z-15GM2255-B, or Z-15GW22-B directly replace BZ-2R72-A2 in all applications?

A: Direct replacement is possible when the application operates within the narrower temperature range (-15°C to 80°C for Z-15GD55-B and Z-15GM2255-B; -25°C to 80°C for Z-15GW22-B) and does not require the extended low-temperature capability of the BZ-2R72-A2 (-55°C minimum). The higher current ratings of substitute parts do not prevent operation in 1A applications. Actuator type differences (round pin plunger versus lever/roller) must be evaluated for mechanical fit and actuation force compatibility.

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

A: The BZ-2R72-A2 uses a round pin plunger actuator, while Z-15GM2255-B and Z-15GW22-B use lever and roller actuators. These differences affect the mechanical interface, actuation force requirements, and operating position. Z-15GD55-B maintains the round pin plunger design. Actuator selection depends on the mechanical design of the application and the force available to actuate the switch.

Q: How do the operating force specifications affect substitution?

A: BZ-2R72-A2 specifies operating force of 255-368gf. Z-15GD55-B requires 540gf, Z-15GM2255-B requires 538gf, and Z-15GW22-B requires 160gf. Applications must provide sufficient actuation force to operate the selected substitute. Z-15GW22-B requires the least force, while Z-15GD55-B and Z-15GM2255-B require significantly higher force than the main part.

Q: What packaging differences exist between these parts?

A: BZ-2R72-A2 is supplied in Bulk packaging. Z-15GD55-B and Z-15GW22-B are supplied in Tray packaging. Z-15GM2255-B is supplied in Bulk packaging. Packaging format affects handling, storage, and procurement processes but does not affect electrical or mechanical function.

Q: Are there temperature range limitations for substitution?

A: Yes. The BZ-2R72-A2 operates from -55°C to 85°C. Z-15GD55-B and Z-15GM2255-B operate from -15°C to 80°C. Z-15GW22-B operates from -25°C to 80°C. Applications requiring operation below -15°C cannot use these substitutes. Applications requiring operation above 80°C cannot use any of the identified substitutes.

Q: What is the difference between electrical life and mechanical life ratings?

A: Mechanical life (20,000,000 cycles for BZ-2R72-A2; 20,000,000 cycles for Z-15GD55-B; 10,000,000 cycles for Z-15GM2255-B and Z-15GW22-B) indicates the number of physical actuations the switch can withstand. Electrical life (500,000 cycles for all Omron substitutes) indicates the number of electrical switching cycles under rated load conditions. The lower electrical life of substitute parts may be a limiting factor in high-cycle applications.

Q: What does the ingress protection rating indicate?

A: BZ-2R72-A2 does not specify an ingress protection rating. Z-15GD55-B and Z-15GM2255-B are rated IP62 (protected against water jets and dust). Z-15GW22-B is rated IP00 (no protection). IP62 rating provides enhanced environmental sealing suitable for applications with moisture or dust exposure. IP00 rating indicates no environmental protection.

Q: How does REACH status affect part selection?

A: Z-15GD55-B and Z-15GW22-B are REACH Unaffected. Z-15GM2255-B is REACH Affected. REACH Affected status indicates the part contains substances of very high concern (SVHC) listed under REACH regulations. Applications subject to REACH compliance requirements may require documentation or may restrict use of REACH Affected parts.