BZ-R88-A2 Equivalent & Substitute Parts Reference

Part Overview

The Honeywell BZ-R88-A2 is a snap action SPDT switch with 10A AC rating at 125V, featuring a round pin plunger actuator and chassis mount configuration with screw terminals. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

BZ-R88-A2

Honeywell Sensing and Productivity SolutionsIn Stock: 967BZ-R88-A2 Datasheet

Current PartRFQ

A-20GD-B7-K

Omron Automation and SafetyIn Stock: 1168A-20GD-B7-K Datasheet

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Z-15GD-B7-K

Omron Automation and SafetyIn Stock: 951Z-15GD-B7-K Datasheet

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Z-15GD55-B7-K

Omron Automation and SafetyIn Stock: 1065Z-15GD55-B7-K Datasheet

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Z-15GS55-B7-K

Omron Automation and SafetyIn Stock: 902Z-15GS55-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 is determined by strict alignment with the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPDT (maintained across all substitutes)
• Switch function: On-Mom (maintained across all substitutes)
• Actuator type: Round pin plunger (maintained across all substitutes)
• Mounting type: Chassis mount (maintained across all substitutes)
• Termination style: Screw terminal (maintained across all substitutes)
• AC voltage rating: 125V (maintained across all substitutes)

Current Rating Substitution Logic:

• BZ-R88-A2 operates at 10A AC maximum
• Substitutes with equal or higher AC current ratings (10A, 15A, or 20A) are functionally compatible for this application
• All substitute parts meet or exceed the 10A AC requirement

Mechanical Compatibility:

• Operating position and pretravel values must align with mechanical envelope constraints
• Z-15H2-B and Z-15GD-B7-K maintain identical operating position (0.625"/15.9mm) and pretravel (0.012"/0.3mm) as the main part
• Z-15GS55-B7-K and Z-15GD55-B7-K feature different operating positions (1.110"/28.2mm and 0.846"/21.5mm respectively) and require mechanical envelope verification
• A-20GD-B7-K operates at 1.030" (26.2mm) position with different pretravel characteristics

Product Status Consideration:

• Main part BZ-R88-A2 is obsolete; all listed substitutes are active products

Parameter Comparison

Engineering Selection Recommendations

Direct Mechanical Equivalent (Preferred for Drop-In Replacement):

Z-15H2-B is the optimal substitute when mechanical envelope constraints are critical. This part maintains identical operating position (0.625"/15.9mm), pretravel (0.012"/0.3mm), and operating force range (200-255gf) as the BZ-R88-A2. Current rating matches at 10A AC. The part is active, RoHS3 compliant, and rated for 20,000,000 mechanical cycles. Operating temperature range is -25°C to 80°C, which is narrower than the original part's -55°C to 85°C specification.

Higher Current Capacity Alternatives:

Z-15GD-B7-K provides 15A AC capacity with identical 125V rating and 20,000,000 mechanical life cycle rating. Operating position differs at 0.846" (21.5mm). This part is active and ROHS3 compliant with REACH affected status.

A-20GD-B7-K offers 20A AC capacity, the highest current rating among substitutes. Operating position is 1.030" (26.2mm). Mechanical life is rated at 1,000,000 cycles, significantly lower than the original specification. This part is active and RoHS compliant.

Enhanced Environmental Protection:

Z-15GD55-B7-K and Z-15GS55-B7-K both feature IP62 ingress protection rating, compared to unspecified protection on the original part. Both maintain 15A AC rating and 20,000,000 mechanical cycles. Operating positions differ from the original specification and require mechanical envelope verification.

Compliance Considerations:

All substitute parts are RoHS compliant. Z-15H2-B and Z-15GD-B7-K carry ROHS3 compliance with REACH affected status. Selection should account for end-application regulatory requirements and operating temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can Z-15H2-B directly replace BZ-R88-A2 without mechanical modification?

A: Z-15H2-B maintains identical operating position (0.625"/15.9mm) and pretravel (0.012"/0.3mm) as BZ-R88-A2, supporting direct mechanical compatibility. Both feature round pin plunger actuators, chassis mount configuration, and screw terminals. Operating force ranges overlap (200-255gf for Z-15H2-B versus 255gf for BZ-R88-A2). Electrical specifications match at 10A AC, 125V. Verification of mounting hole patterns and terminal spacing is required for final installation confirmation.

Q: What is the difference between Z-15GD-B7-K and Z-15GD55-B7-K?

A: Both parts share identical current rating (15A AC), voltage rating (125V), and mechanical life (20,000,000 cycles). Key differences include: Z-15GD55-B7-K features IP62 ingress protection versus IP00 for Z-15GD-B7-K; operating force is 540gf (fixed) for Z-15GD55-B7-K versus 250-350gf (range) for Z-15GD-B7-K; pretravel is 0.071" (1.8mm) for Z-15GD55-B7-K versus 0.015" (0.4mm) for Z-15GD-B7-K; operating temperature range is -15°C to 80°C for Z-15GD55-B7-K versus -25°C to 80°C for Z-15GD-B7-K.

Q: Why does A-20GD-B7-K have lower mechanical life than other substitutes?

A: A-20GD-B7-K is rated for 1,000,000 mechanical cycles compared to 20,000,000 cycles for other substitutes. This specification difference reflects the design characteristics of the A-20GD series. Applications requiring extended cycle life should prioritize Z-15H2-B, Z-15GD-B7-K, Z-15GD55-B7-K, or Z-15GS55-B7-K.

Q: Are all substitutes RoHS compliant?

A: All listed substitutes are RoHS compliant. Z-15H2-B and Z-15GD-B7-K carry ROHS3 compliance designation. Z-15GD55-B7-K, Z-15GS55-B7-K, and A-20GD-B7-K are RoHS compliant. Z-15H2-B and Z-15GD-B7-K are marked as REACH affected; others are not specified as REACH affected.

Q: What is the operating temperature limitation when substituting with active parts?

A: BZ-R88-A2 operates from -55°C to 85°C. All active substitutes have narrower temperature ranges: Z-15H2-B, Z-15GD-B7-K, and A-20GD-B7-K operate from -25°C to 80°C; Z-15GD55-B7-K and Z-15GS55-B7-K operate from -15°C to 80°C. Applications requiring operation below -25°C or above 80°C cannot use these substitutes.

Q: Which substitute provides the closest electrical and mechanical match?

A: Z-15H2-B provides the closest match to BZ-R88-A2. Matching parameters include: identical current rating (10A AC), identical voltage rating (125V), identical operating position (0.625"/15.9mm), identical pretravel (0.012"/0.3mm), overlapping operating force range (200-255gf), identical mechanical life (20,000,000 cycles), and identical circuit/function configuration (SPDT On-Mom). The primary limitation is the narrower operating temperature range (-25°C to 80°C versus -55°C to 85°C).

Q: Can higher current-rated substitutes be used in applications designed for 10A?

A: Yes. Z-15GD-B7-K (15A), Z-15GS55-B7-K (15A), Z-15GD55-B7-K (15A), and A-20GD-B7-K (20A) all exceed the 10A AC requirement and are electrically compatible for applications rated at 10A or lower. Current rating represents maximum capacity; operation at lower currents is within specification. Mechanical envelope compatibility must be verified independently based on operating position and pretravel differences.