BM-1R-A2 Equivalent & Substitute Parts Reference

Part Overview

The Honeywell BM-1R-A2 is a snap action SPDT switch with 22A AC rating at 125V, featuring chassis mount configuration and screw terminal termination. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain SPDT circuit configuration, 125V AC voltage rating, and chassis mount mechanical compatibility while accommodating variations in current rating and operational characteristics.

Key Parameters

Parameter	BM-1R-A2 Value
Manufacturer	Honeywell Sensing and Productivity Solutions
Circuit Configuration	SPDT
Switch Function	On-Mom
Current Rating (AC)	22A
Voltage Rating (AC)	125V
Actuator Type	Round (Pin Plunger)
Mounting Type	Chassis Mount
Termination Style	Screw Terminal
Operating Temperature Range	-55°C to 85°C
Mechanical Life	20,000,000 Cycles
Product Status	Obsolete
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Primary Compatibility Criteria:

Circuit configuration: SPDT (maintained across all substitutes)
Voltage rating: 125V AC (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)

Secondary Variation Parameters:

Current rating: Substitutes range from 15A to 20A AC, representing reduced current capacity relative to the 22A original specification
Operating temperature: Substitutes operate within -25°C to -15°C minimum (narrower range than original -55°C minimum)
Mechanical life: All substitutes maintain 20,000,000 cycle rating except A-20GD-B7-K at 1,000,000 cycles
Ingress protection: Substitutes include IP00 or IP62 ratings; original specification does not define ingress protection

Active Status Requirement: All listed substitutes maintain active product status, ensuring ongoing availability and manufacturer support.

Parameter Comparison

Parameter	BM-1R-A2	A-20GD-B7-K	Z-15GD-B7-K	Z-15GD55-B7-K	Z-15GS55-B7-K
Manufacturer	Honeywell	Omron	Omron	Omron	Omron
Circuit	SPDT	SPDT	SPDT	SPDT	SPDT
Switch Function	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom
Current Rating (AC)	22A	20A	15A	15A	15A
Voltage Rating (AC)	125V	125V	125V	125V	125V
Actuator Type	Round (Pin Plunger)	Round (Pin Plunger)	Round (Pin Plunger)	Round (Pin Plunger)	Round (Pin Plunger)
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal
Operating Temperature (Min)	-55°C	-25°C	-25°C	-15°C	-15°C
Operating Temperature (Max)	85°C	80°C	80°C	80°C	80°C
Mechanical Life	20,000,000 Cycles	1,000,000 Cycles	20,000,000 Cycles	20,000,000 Cycles	20,000,000 Cycles
Ingress Protection	Not specified	IP00	IP00	IP62	IP62
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS3 Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

A-20GD-B7-K (Omron): This substitute maintains the highest current rating at 20A AC, closest to the original 22A specification. It provides active product status and RoHS compliance. However, mechanical life is limited to 1,000,000 cycles, significantly lower than the original 20,000,000 cycle rating. This part is suitable for applications where current capacity is prioritized and cycle life requirements are moderate.

Z-15GD-B7-K (Omron): This substitute reduces current rating to 15A AC and operating temperature minimum to -25°C. It maintains 20,000,000 mechanical life cycles and RoHS3 compliance. IP00 ingress protection indicates standard environmental sealing. This part is suitable for applications operating within the -25°C to 80°C temperature range with 15A current requirements.

Z-15GD55-B7-K (Omron): This substitute provides IP62 ingress protection, indicating enhanced environmental sealing suitable for moisture-exposed applications. Current rating is 15A AC with operating temperature minimum of -15°C. Mechanical life is maintained at 20,000,000 cycles. This part is suitable for applications requiring sealed enclosure protection.

Z-15GS55-B7-K (Omron): This substitute also provides IP62 ingress protection with 15A AC current rating and -15°C minimum operating temperature. Operating position is 1.110" (28.2mm), differing from other variants. Mechanical life is 20,000,000 cycles. This part is suitable for sealed applications with specific actuator travel requirements.

Compliance Considerations: All substitutes maintain RoHS compliance. Z-15GD-B7-K carries RoHS3 designation. Z-15GD-B7-K is REACH Affected; all others are REACH Unaffected or unspecified. All parts carry EAR99 ECCN classification and 8536.50.9040 HTSUS code, matching the original part.

Frequently Asked Questions (FAQ)

Q: Can the BM-1R-A2 be directly replaced with any of these substitutes?

A: Direct replacement requires verification that the application current requirement does not exceed the substitute part's rating. A-20GD-B7-K supports up to 20A AC; Z-series parts support 15A AC. If the original design operates at 22A AC, no substitute maintains full current capacity. Applications operating below 15A AC can use any substitute. Applications operating between 15A and 20A AC can use A-20GD-B7-K only.

Q: What is the impact of reduced mechanical life in A-20GD-B7-K?

A: A-20GD-B7-K provides 1,000,000 mechanical cycles versus 20,000,000 in the original and other substitutes. This represents a 20-fold reduction in cycle life. Applications with high actuation frequency or long service life requirements should use Z-series substitutes instead.

Q: Which substitute is appropriate for low-temperature applications?

A: The original BM-1R-A2 operates to -55°C. All substitutes have higher minimum operating temperatures: A-20GD-B7-K and Z-15GD-B7-K operate to -25°C; Z-15GD55-B7-K and Z-15GS55-B7-K operate to -15°C. Applications requiring operation below -25°C cannot use any listed substitute.

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

A: Both parts provide IP62 ingress protection, 15A AC rating, and 20,000,000 mechanical life. The primary difference is operating position: Z-15GD55-B7-K operates at 0.846" (21.5mm); Z-15GS55-B7-K operates at 1.110" (28.2mm). Selection depends on mechanical clearance and actuator travel requirements in the application.

Q: Are all substitutes available in the same packaging as the original?

A: The original BM-1R-A2 packaging is not specified. All substitutes are available in bulk packaging. Confirm packaging requirements with procurement specifications before finalizing part selection.

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

A: IP62 rating indicates protection against water jets and dust ingress, suitable for applications with moisture exposure or contaminated environments. A-20GD-B7-K and Z-15GD-B7-K provide IP00 rating, indicating no special environmental protection. Select IP62 variants for sealed or moisture-exposed applications.

Q: Can substitutes be used interchangeably in the same circuit?

A: Substitutes can be used interchangeably only if the application current requirement does not exceed the substitute's rating and operating temperature range is compatible. Mechanical life and ingress protection differences must be evaluated against application duty cycle and environmental conditions.

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