BZ-R-P4 Equivalent & Substitute Parts Reference

Part Overview

The BZ-R-P4 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 15A at 125V AC with a round pin plunger actuator and screw terminal connections. The product is Active status with 824 units in current inventory. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameter ranges for snap action SPDT switch applications, particularly when current rating requirements differ or when alternative sourcing is necessary.

Substiute Parts

BZ-R-P4

Honeywell Sensing and Productivity SolutionsIn Stock: 927BZ-R-P4 Datasheet

Current PartRFQ

TZ-1G

Omron Automation and SafetyIn Stock: 1058TZ-1G Datasheet

SimilarRFQ

Z-01HD55-B

Omron Automation and SafetyIn Stock: 1035Z-01HD55-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZ-R-P4 are identified based on the following critical parameters that define functional equivalency:

Primary Matching Criteria:

• Circuit configuration: SPDT (Single Pole Double Throw)
• Switch function: On-Mom (momentary operation)
• Actuator type: Round pin plunger
• Mounting type: Chassis mount
• Termination style: Screw terminal
• AC voltage rating: 125V minimum

Secondary Consideration:

• Current rating tolerance: Substitutes may have lower current ratings if the application does not require the full 15A capacity. Parts with reduced current ratings (1A or 100mA) are listed as substitutes for applications where lower current switching is acceptable.

The identified substitutes TZ-1G and Z-01HD55-B maintain the core SPDT snap action architecture and chassis mount configuration. However, each substitute presents distinct trade-offs in current capacity, operating force, temperature range, and mechanical life that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

BZ-R-P4 Primary Selection: The BZ-R-P4 is the appropriate choice for applications requiring 15A AC switching at 125V with SPDT momentary operation. This part maintains Active product status with RoHS compliance and unlimited moisture sensitivity rating. The 20,000,000 cycle mechanical life supports high-cycle industrial applications.

TZ-1G Substitute Conditions: The TZ-1G is suitable as a substitute only in applications where the switching current requirement does not exceed 1A AC. This Omron part provides ROHS3 compliance and extended temperature operation (-65°C to 400°C). However, the mechanical life is significantly reduced to 100,000 cycles, and the operating force is substantially higher (500gf versus 198-255gf). The TZ-1G is packaged in trays.

Z-01HD55-B Substitute Conditions: The Z-01HD55-B is suitable only for applications requiring 100mA or less switching current at 125V AC. This part provides equivalent mechanical life (20,000,000 cycles) and RoHS compliance. The operating position differs (0.846" versus 0.625"), and the operating temperature range is narrower (-15°C to 80°C). The Z-01HD55-B features IP62 ingress protection and is supplied in bulk packaging.

Compliance Basis: All three parts maintain RoHS compliance and EAR99 ECCN classification. Selection between parts must be based on actual application current requirements, operating force constraints, temperature environment, and mechanical cycle expectations.

Frequently Asked Questions (FAQ)

Q: Can the TZ-1G replace the BZ-R-P4 in all applications?

A: No. The TZ-1G is rated for maximum 1A AC current, compared to the BZ-R-P4's 15A rating. Substitution is only valid for applications where the actual switching current does not exceed 1A. Additionally, the TZ-1G has significantly higher operating force (500gf) and lower mechanical life (100,000 cycles).

Q: What is the primary difference between TZ-1G and Z-01HD55-B?

A: The TZ-1G is rated for 1A AC/DC switching, while the Z-01HD55-B is rated for 100mA AC/DC. The TZ-1G supports extended temperature operation (-65°C to 400°C) but has lower mechanical life (100,000 cycles). The Z-01HD55-B maintains 20,000,000 cycle mechanical life but operates within -15°C to 80°C range. The Z-01HD55-B includes IP62 ingress protection.

Q: Are all three parts RoHS compliant?

A: Yes. The BZ-R-P4 and Z-01HD55-B are RoHS Compliant. The TZ-1G is ROHS3 Compliant. All three parts meet RoHS requirements.

Q: Does operating position affect substitution compatibility?

A: Yes. The BZ-R-P4 and TZ-1G both have 0.625" (15.9mm) operating position, while the Z-01HD55-B has 0.846" (21.5mm). Mechanical clearance and actuator engagement must be verified if substituting the Z-01HD55-B.

Q: What packaging options are available?

A: The BZ-R-P4 packaging is not specified. The TZ-1G is supplied in trays (1038 units in stock). The Z-01HD55-B is supplied in bulk (996 units in stock).

Q: Can these parts be used in DC applications?

A: The BZ-R-P4 is rated for AC only (125V AC). The TZ-1G and Z-01HD55-B are both rated for AC/DC operation (125V AC, 30V DC).

Q: Which substitute has the longest mechanical life?

A: Both the BZ-R-P4 and Z-01HD55-B are rated for 20,000,000 mechanical cycles. The TZ-1G is rated for only 100,000 cycles.