BZ-RT04 Equivalent & Substitute Parts Reference

Part Overview

The Honeywell BZ-RT04 is an SPDT snap action switch rated for 15A at 125V AC with chassis mount configuration and screw terminal termination. This switch features a round pin plunger actuator and On-Mom switch function, designed for applications requiring reliable switching performance across industrial temperature ranges. The part is Active status and RoHS Compliant, with 1,098 units currently in stock. Equivalent and substitute parts are identified based on matching circuit topology, voltage ratings, mounting configuration, and mechanical compatibility within specified operational parameters.

Substiute Parts

BZ-RT04

Honeywell Sensing and Productivity SolutionsIn Stock: 1178BZ-RT04 Datasheet

Current PartRFQ

A-20GD-B7-K

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

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Z-15G-B

Omron Automation and SafetyIn Stock: 1404Z-15G-B 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

Substitute parts for the BZ-RT04 are grouped based on the following substitution criteria:

Primary Substitution Parameters:

• Circuit configuration: SPDT (Single Pole Double Throw)
• Switch function: On-Mom (Momentary)
• Voltage rating: 125V AC minimum
• Actuator type: Round pin plunger
• Mounting type: Chassis mount
• Termination style: Screw terminal
• Mechanical life: 20,000,000 cycles minimum

Current Rating Compatibility: Substitutes are classified into two groups: direct current rating matches (15A AC) and higher current ratings (20A AC). Parts with 15A AC rating provide direct electrical equivalence. Parts with 20A AC rating provide enhanced current capacity while maintaining all other electrical and mechanical specifications.

Mechanical Compatibility: Operating position, pretravel, differential travel, and overtravel parameters determine mechanical fit and actuation characteristics. Parts with identical or functionally equivalent operating positions (0.625" / 15.9mm) are considered direct mechanical substitutes.

Environmental and Compliance Factors: Operating temperature range, RoHS compliance status, and moisture sensitivity level (MSL) are evaluated for application suitability. The BZ-RT04 operates from -55°C to 85°C; substitutes with narrower temperature ranges (-25°C to 80°C or -15°C to 80°C) are suitable for applications within those reduced ranges.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (15A AC, 125V AC):

Z-15G-B and Z-15H2-B provide direct electrical equivalence to the BZ-RT04 with identical 125V AC voltage rating and SPDT On-Mom configuration. Z-15G-B matches the 15A AC current rating exactly. Both parts are Active status and RoHS compliant. Z-15G-B operates within -25°C to 80°C and maintains 20,000,000 mechanical life cycles. Z-15H2-B operates at 10A AC, suitable for applications with lower current requirements within the same voltage and temperature constraints.

Enhanced Current Capacity:

A-20GD-B7-K provides 20A AC rating, offering 33% higher current capacity than the BZ-RT04 while maintaining 125V AC voltage rating and SPDT On-Mom function. This part is suitable for applications requiring higher current switching capability. Operating temperature range is -25°C to 80°C. Mechanical life is 1,000,000 cycles, which is lower than the BZ-RT04.

Mechanical Position Variants:

Z-15GD-B7-K, Z-15GD55-B7-K, and Z-15GS55-B7-K feature different operating positions (0.846" and 1.110" respectively) compared to the BZ-RT04 (0.625"). These variants are suitable for applications where different actuation stroke lengths are required. All maintain 15A AC, 125V AC electrical ratings and 20,000,000 mechanical life cycles.

Environmental Considerations:

Z-15GD55-B7-K and Z-15GS55-B7-K include IP62 ingress protection rating, suitable for applications requiring moisture and dust resistance. Operating temperature range is -15°C to 80°C. The BZ-RT04 lacks specified ingress protection rating.

Compliance and Availability:

All substitute parts are Active status. Z-15G-B, Z-15GD-B7-K, and Z-15H2-B carry ROHS3 compliance. Z-15GD55-B7-K and Z-15GS55-B7-K carry RoHS compliance. Current inventory levels range from 797 to 1,359 units across substitute options.

Frequently Asked Questions (FAQ)

Q: Can Z-15H2-B replace BZ-RT04 in all applications?

A: Z-15H2-B is electrically compatible for applications rated at 10A AC or lower. The BZ-RT04 is rated for 15A AC. Z-15H2-B is not suitable for applications requiring the full 15A AC switching capacity. Both parts share identical operating position (0.625"), SPDT circuit, On-Mom function, and 20,000,000 mechanical life cycles.

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

A: Both parts provide 15A AC, 125V AC SPDT On-Mom switching with 20,000,000 mechanical life. Z-15G-B has operating position of 0.625" (15.9mm) and is packaged in Tray. Z-15GD-B7-K has operating position of 0.846" (21.5mm) and is packaged in Bulk. Operating force and pretravel specifications differ between the two variants. Selection depends on required actuation stroke and packaging requirements.

Q: Can A-20GD-B7-K be used as a direct replacement for BZ-RT04?

A: A-20GD-B7-K provides higher current capacity (20A AC versus 15A AC) and maintains 125V AC voltage rating and SPDT On-Mom function. However, mechanical life is 1,000,000 cycles compared to BZ-RT04's 20,000,000 cycles. Operating position is 1.030" (26.2mm) versus BZ-RT04's 0.625" (15.9mm). A-20GD-B7-K is suitable for applications where higher current capacity is required and mechanical life requirements are lower.

Q: What is the significance of IP62 rating on Z-15GD55-B7-K and Z-15GS55-B7-K?

A: IP62 ingress protection rating indicates protection against dust ingress and water spray from any direction. BZ-RT04 does not specify ingress protection. Z-15GD55-B7-K and Z-15GS55-B7-K are suitable for applications in wet or dusty environments. Both maintain 15A AC, 125V AC ratings and 20,000,000 mechanical life cycles.

Q: How do operating position differences affect substitution?

A: Operating position determines the physical stroke length required to actuate the switch. BZ-RT04 requires 0.625" (15.9mm) stroke. Z-15G-B and Z-15H2-B match this specification. Z-15GD-B7-K and Z-15GD55-B7-K require 0.846" (21.5mm) stroke. Z-15GS55-B7-K requires 1.110" (28.2mm) stroke. A-20GD-B7-K requires 1.030" (26.2mm) stroke. Mechanical fit and actuator design must accommodate the required stroke length.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts are RoHS compliant. Z-15G-B, Z-15GD-B7-K, and Z-15H2-B carry ROHS3 compliance designation. Z-15GD55-B7-K and Z-15GS55-B7-K carry RoHS compliance designation. A-20GD-B7-K carries RoHS compliance designation. BZ-RT04 is RoHS Compliant.

Q: What is the operating temperature range limitation for substitutes?

A: BZ-RT04 operates from -55°C to 85°C. All Omron substitute parts operate within narrower ranges: -25°C to 80°C (Z-15G-B, Z-15GD-B7-K, Z-15H2-B, A-20GD-B7-K) or -15°C to 80°C (Z-15GD55-B7-K, Z-15GS55-B7-K). Substitutes are suitable only for applications within their specified temperature ranges. Applications requiring operation below -25°C or above 80°C require the BZ-RT04 or equivalent parts with extended temperature ratings.

Q: What packaging options are available for substitute parts?

A: Z-15G-B is packaged in Tray. A-20GD-B7-K, Z-15GD-B7-K, Z-15GD55-B7-K, Z-15GS55-B7-K, and Z-15H2-B are packaged in Bulk. Packaging selection depends on procurement volume and inventory management requirements.