BZ-2R244T Equivalent & Substitute Parts

Part Overview

The Honeywell BZ-2R244T is an SPDT snap action switch with chassis mount configuration, rated for 5A AC at 125V and 500mA DC at 125V. This switch features a round pin plunger actuator with screw terminal connections and operates across a wide temperature range of -55°C to 204°C. The part is RoHS compliant and currently active in production with 1,140 units in stock. Equivalent and substitute parts are identified for applications requiring alternative electrical ratings, mechanical characteristics, or environmental specifications while maintaining core SPDT switching functionality and chassis mount form factor.

Substiute Parts

BZ-2R244T

Honeywell Sensing and Productivity SolutionsIn Stock: 1179BZ-2R244T Datasheet

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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-2R244T are selected based on strict compatibility criteria within the snap action switch category. All substitute parts maintain the following core parameters:

Fixed Compatibility Parameters:

• Circuit configuration: SPDT
• Switch function: On-Mom
• Actuator type: Round (Pin Plunger)
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• AC voltage rating: 125V

Variable Parameters Allowing Substitution:

• Current rating (AC and DC): Substitutes may have equal or higher ratings
• DC voltage rating: Substitutes rated 30V DC are acceptable for 125V DC applications
• Operating temperature range: Substitutes with narrower ranges are acceptable if application requirements are met
• Mechanical life: Substitutes with equal or higher cycle ratings are acceptable
• Ingress protection: Enhanced ratings (IP62) are acceptable upgrades
• Operating position and travel characteristics: Variations permitted based on mechanical envelope compatibility

Substitute parts are grouped by current rating capability: 10A, 15A, and 20A AC ratings, with corresponding DC ratings of 2A, 6A, and 6A respectively.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Minimal Design Changes):

Z-15H2-B is the closest functional equivalent to BZ-2R244T. Both parts share identical operating position (0.625"), pretravel (0.015"), differential travel (0.002"), and overtravel (0.005") specifications. The Z-15H2-B provides 10A AC capacity with 20,000,000 mechanical life cycles, matching the BZ-2R244T's cycle rating. This part is suitable for applications where the 5A AC requirement can be satisfied by a 10A-rated component. ROHS3 compliance status is equivalent to RoHS compliance for most regulatory applications.

For Higher Current Requirements:

Z-15G-B, Z-15GD-B7-K, Z-15GS55-B7-K, and Z-15GD55-B7-K provide 15A AC ratings with identical 20,000,000 mechanical life cycles. These parts are suitable when application current demands exceed 5A but remain below 15A. Z-15G-B offers standard IP00 ingress protection with tray packaging. Z-15GD-B7-K and Z-15GS55-B7-K provide enhanced IP62 ingress protection for sealed or moisture-exposed environments.

For Maximum Current Capacity:

A-20GD-B7-K provides 20A AC rating with IP00 ingress protection. This part is suitable for applications requiring the highest current capacity. Note that mechanical life is rated at 1,000,000 cycles, which is lower than the BZ-2R244T specification.

Temperature Range Considerations:

The BZ-2R244T operates from -55°C to 204°C. All Omron substitute parts operate within -25°C to -15°C minimum and 80°C maximum ranges. Substitution is appropriate only for applications where the narrower temperature range is acceptable.

DC Voltage Consideration:

All Omron substitute parts are rated 30V DC maximum, compared to the BZ-2R244T's 125V DC rating. For DC applications requiring 125V operation, the BZ-2R244T must be retained.

Frequently Asked Questions (FAQ)

Q: Can Z-15H2-B replace BZ-2R244T in all applications?

A: Z-15H2-B is functionally compatible for SPDT switching applications with identical mechanical characteristics and 125V AC operation. However, substitution is limited to applications where: (1) the 10A AC rating satisfies current requirements, (2) operating temperature remains within -25°C to 80°C, and (3) DC operation does not exceed 30V. For applications requiring 125V DC operation or temperatures below -25°C or above 80°C, the BZ-2R244T must be used.

Q: What is the difference between Z-15GD55-B7-K and Z-15GS55-B7-K?

A: Both parts provide 15A AC rating, IP62 ingress protection, and 20,000,000 mechanical life cycles. The primary difference is operating position: Z-15GD55-B7-K operates at 0.846" (21.5mm) with 540gf operating force, while Z-15GS55-B7-K operates at 1.110" (28.2mm) with 250-350gf operating force. Selection depends on mechanical envelope constraints and actuator force requirements of the application.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry either RoHS Compliant or ROHS3 Compliant status. Both designations satisfy RoHS Directive requirements. ROHS3 represents the current RoHS 3 standard (2011/65/EU as amended), while RoHS Compliant indicates compliance with the original directive.

Q: Can substitute parts be used in high-temperature applications?

A: No. The BZ-2R244T operates to 204°C, while all Omron substitute parts have maximum operating temperatures of 80°C. For applications exceeding 80°C, the BZ-2R244T is required.

Q: What packaging options are available for substitute parts?

A: Z-15H2-B, Z-15GD-B7-K, Z-15GS55-B7-K, Z-15GD55-B7-K, and A-20GD-B7-K are supplied in bulk packaging. Z-15G-B is supplied in tray packaging. Packaging selection affects inventory management and component handling procedures.

Q: Is A-20GD-B7-K suitable for applications requiring 20,000,000 cycle life?

A: No. A-20GD-B7-K is rated for 1,000,000 mechanical cycles, which is significantly lower than the BZ-2R244T's 20,000,000 cycle specification. For high-cycle applications, Z-15G-B, Z-15GD-B7-K, Z-15GS55-B7-K, or Z-15GD55-B7-K are appropriate substitutes.

Q: What is the significance of IP62 ingress protection in Z-15GD55-B7-K and Z-15GS55-B7-K?

A: IP62 rating indicates protection against limited dust ingress and water spray from any direction. This is an upgrade from IP00 (no protection) and is suitable for applications in damp, humid, or spray environments. Standard IP00 parts (Z-15H2-B, Z-15G-B, Z-15GD-B7-K, A-20GD-B7-K) are appropriate for dry indoor environments only.

Q: Can DC current ratings of substitute parts be exceeded?

A: No. All Omron substitute parts are rated maximum 6A DC (except Z-15H2-B at 2A DC), compared to BZ-2R244T's 500mA DC rating. These ratings must not be exceeded. For applications requiring higher DC current capacity, the BZ-2R244T or alternative high-current DC-rated switches must be evaluated.