Equivalent & Substitute Parts for BZ-2R55156T-S

Part Overview

The BZ-2R55156T-S is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch features a round pin plunger actuator with screw terminal connections, rated for 10A AC at 125V and 500mA DC at 125V. The switch operates in an On-Momentary function and is designed for applications requiring reliable snap action switching with 20,000,000 mechanical cycles. The product status is obsolete, necessitating identification of equivalent substitute components that maintain functional compatibility while ensuring continued availability and supply chain continuity.

Substiute Parts

BZ-2R55156T-S

Honeywell Sensing and Productivity SolutionsIn Stock: 730BZ-2R55156T-S Datasheet

Current PartRFQ

A-20GV22-B7-K

Omron Automation and SafetyIn Stock: 946A-20GV22-B7-K Datasheet

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Z-15H2-B

Omron Automation and SafetyIn Stock: 1146Z-15H2-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2R55156T-S is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• Mounting type must be Chassis Mount
• Termination style must be Screw Terminal
• AC voltage rating must support 125V minimum
• AC current rating must support 10A minimum

Secondary Compatibility Criteria:

• Actuator type compatibility (Round Pin Plunger preferred for form-fit equivalence)
• Operating temperature range must encompass or exceed the application requirements
• Mechanical life rating must meet or exceed 20,000,000 cycles for equivalent durability
• RoHS compliance status for regulatory alignment

The substitute parts identified below satisfy the primary compatibility criteria. Variations in secondary parameters reflect design differences between manufacturers while maintaining functional equivalence for the specified electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

Z-15H2-B (Omron Automation and Safety) - Primary Substitute

The Z-15H2-B provides the closest functional equivalence to the BZ-2R55156T-S. Both switches feature identical SPDT circuit configuration, On-Momentary function, 10A AC rating at 125V, round pin plunger actuator, chassis mount configuration, and screw terminal termination. The Z-15H2-B maintains the same 20,000,000 mechanical life cycle rating as the original part. The Z-15H2-B is currently in active production status, ensuring supply chain availability. ROHS3 compliance exceeds the RoHS compliance requirement of the original part. The operating temperature range of -25°C to 80°C is narrower than the original -55°C to 85°C specification; applications requiring the full original temperature range must account for this limitation. DC voltage rating is reduced to 30V compared to the original 125V DC rating.

A-20GV22-B7-K (Omron Automation and Safety) - Secondary Substitute

The A-20GV22-B7-K satisfies the primary compatibility criteria with SPDT circuit, On-Momentary function, 125V AC voltage rating, chassis mount, and screw terminal termination. The current rating of 20A AC exceeds the 10A requirement of the original part, providing design margin. The A-20GV22-B7-K is in active production status with RoHS compliance. Significant parameter differences include lever/roller actuator type (versus round pin plunger), reduced mechanical life of 1,000,000 cycles (versus 20,000,000), and narrower operating temperature range of -25°C to 80°C. Selection of this substitute requires confirmation that the different actuator geometry and reduced mechanical life are acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can the Z-15H2-B directly replace the BZ-2R55156T-S in all applications?

A: The Z-15H2-B provides functional equivalence for SPDT switching at 10A AC and 125V AC. However, applications requiring DC operation at 125V cannot use the Z-15H2-B, which is rated for 30V DC maximum. Applications operating below -25°C or above 80°C exceed the Z-15H2-B operating temperature range and require evaluation of thermal performance requirements.

Q: What are the key differences between the Z-15H2-B and A-20GV22-B7-K substitutes?

A: The Z-15H2-B maintains the round pin plunger actuator and 20,000,000 mechanical life cycle rating of the original BZ-2R55156T-S. The A-20GV22-B7-K features a lever/roller actuator and provides higher AC current capacity (20A) but with reduced mechanical life (1,000,000 cycles). Actuator type selection depends on mechanical interface requirements; lever/roller actuators require different mounting geometry than pin plungers.

Q: Are there packaging considerations when substituting these parts?

A: The BZ-2R55156T-S original packaging is not specified in available data. The Z-15H2-B is supplied in bulk packaging, while the A-20GV22-B7-K is supplied in tray packaging. Packaging format may affect handling, storage, and integration into assembly processes.

Q: What compliance certifications apply to these substitute parts?

A: The BZ-2R55156T-S is RoHS Compliant. The Z-15H2-B is ROHS3 Compliant and REACH Affected. The A-20GV22-B7-K is RoHS Compliant and REACH Unaffected. Applications subject to REACH regulations must account for the REACH Affected status of the Z-15H2-B.

Q: Can the A-20GV22-B7-K be used in applications requiring 20,000,000 mechanical cycles?

A: No. The A-20GV22-B7-K is rated for 1,000,000 mechanical cycles, which is significantly lower than the 20,000,000 cycle requirement of the original BZ-2R55156T-S. Applications with high cycle count requirements must use the Z-15H2-B or identify alternative components with equivalent mechanical life ratings.