BZ-2R244-A2 Equivalent & Substitute Parts Reference

Part Overview

The BZ-2R244-A2 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch features a round pin plunger actuator with screw terminal connections, rated for 5A AC at 125V and 500mA DC at 125V. The switch operates in On-Momentary function with mechanical life of 20,000,000 cycles and is RoHS Compliant with MSL 1 rating. The product maintains Active status in the component market with 874 units currently in stock.

Equivalent and substitute parts are necessary when the primary BZ-2R244-A2 becomes unavailable, when design requirements necessitate different electrical ratings, or when alternative mechanical specifications better suit application constraints. Substitute parts listed below maintain the same circuit topology (SPDT), actuator type (round pin plunger), and mounting configuration (chassis mount) while offering variations in current capacity, operating force, and environmental specifications.

Key Parameters

Parameter	BZ-2R244-A2 Value	Substitution Relevance
Circuit Configuration	SPDT	Critical - must match for functional equivalence
Switch Function	On-Momentary	Critical - determines operational behavior
Current Rating (AC)	5A @ 125V	Critical - determines load capacity
Current Rating (DC)	500mA @ 125V	Critical - determines DC load capacity
Actuator Type	Round (Pin Plunger)	Critical - determines mechanical interface
Mounting Type	Chassis Mount	Critical - determines installation method
Termination Style	Screw Terminal	Critical - determines electrical connection
Operating Force	255 ~ 368gf	Important - affects actuation feel and reliability
Operating Position	0.625" (15.9mm)	Important - affects mechanical clearance requirements
Operating Temperature Range	-55°C ~ 204°C	Important - determines environmental suitability
Mechanical Life	20,000,000 Cycles	Important - indicates durability and reliability
RoHS Status	RoHS Compliant	Important - regulatory compliance requirement

Substitute Part Grouping Explanation

Substitution logic for the BZ-2R244-A2 is based on strict parameter matching within the allowed electrical and mechanical specifications for snap action SPDT switches. All substitute parts maintain identical circuit configuration (SPDT), switch function (On-Momentary), actuator type (round pin plunger), mounting type (chassis mount), and termination style (screw terminal).

Substitute parts are grouped into two categories based on current rating compatibility:

Category 1: Direct Current Rating Substitutes (5A AC equivalent or higher) Parts in this category support the original 5A AC requirement at 125V AC. These parts may exceed the original current specification, which is acceptable for direct substitution in applications where the load does not exceed 5A AC.

Category 2: Reduced Current Rating Substitutes (below 5A AC) Parts in this category provide lower current ratings (10A AC or 15A AC) but maintain the 125V AC voltage specification. These parts are suitable for applications where the actual load current is lower than the original 5A specification.

Key parameters determining substitution eligibility:

AC Voltage Rating: 125V (required match)
DC Voltage Rating: 30V or higher (acceptable for 125V DC applications)
Actuator Type: Round pin plunger (required match)
Mounting: Chassis mount (required match)
Termination: Screw terminal (required match)
Circuit: SPDT (required match)
Function: On-Momentary (required match)

Parameter Comparison

Parameter	BZ-2R244-A2 (Honeywell)	A-20GD-B7-K (Omron)	Z-15GD-B7-K (Omron)	Z-15GD55-B7-K (Omron)	Z-15GS55-B7-K (Omron)	Z-15H2-B (Omron)
Circuit	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT
Switch Function	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom
Current Rating (AC)	5A	20A	15A	15A	15A	10A
Current Rating (DC)	500mA	6A	6A	6A	6A	2A
Voltage Rating (AC)	125V	125V	125V	125V	125V	125V
Voltage Rating (DC)	125V	30V	30V	30V	30V	30V
Actuator Type	Round (Pin Plunger)	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	Chassis Mount
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal
Operating Force	255 ~ 368gf	400 ~ 625gf	250 ~ 350gf	540gf	250 ~ 350gf	200 ~ 255gf
Release Force	113gf	285gf	114gf	114gf	114gf	114gf
Operating Position	0.625" (15.9mm)	1.030" (26.2mm)	0.846" (21.5mm)	0.846" (21.5mm)	1.110" (28.2mm)	0.625" (15.9mm)
Pretravel	0.015" (0.4mm)	0.051" (1.3mm)	0.015" (0.4mm)	0.071" (1.8mm)	0.015" (0.4mm)	0.012" (0.3mm)
Differential Travel	0.002" (0.05mm)	0.008" (0.2mm)	0.002" (0.05mm)	0.002" (0.05mm)	0.002" (0.05mm)	0.0003" (0.008mm)
Overtravel	0.005" (0.13mm)	0.118" (3.0mm)	0.062" (1.6mm)	0.062" (1.6mm)	0.062" (1.6mm)	0.005" (0.13mm)
Operating Temperature	-55°C ~ 204°C	-25°C ~ 80°C	-25°C ~ 80°C	-15°C ~ 80°C	-15°C ~ 80°C	-25°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	20,000,000 Cycles
Ingress Protection	Not specified	IP00	IP00	IP62	IP62	IP00
RoHS Status	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

A-20GD-B7-K (Omron Automation and Safety)

The A-20GD-B7-K provides the highest current capacity at 20A AC, suitable for applications requiring current headroom beyond the original 5A specification. This part maintains 125V AC voltage compatibility and identical circuit/function characteristics. However, the operating temperature range (-25°C ~ 80°C) is significantly narrower than the BZ-2R244-A2 (-55°C ~ 204°C), restricting use in extreme temperature environments. Mechanical life is reduced to 1,000,000 cycles compared to 20,000,000 cycles in the original part. Selection of this substitute is appropriate only when higher AC current capacity is required and operating temperature remains within -25°C to 80°C range. RoHS Compliant status maintains regulatory alignment.

Z-15GD-B7-K (Omron Automation and Safety)

The Z-15GD-B7-K offers 15A AC rating with operating force (250 ~ 350gf) closely matching the original specification (255 ~ 368gf). Mechanical life remains at 20,000,000 cycles, equivalent to the BZ-2R244-A2. Operating position (0.846" / 21.5mm) differs from the original (0.625" / 15.9mm), requiring verification of mechanical clearance in the application. Operating temperature range (-25°C ~ 80°C) is narrower than the original. ROHS3 Compliant status and REACH Affected designation indicate current regulatory compliance. This substitute is suitable for applications where 15A AC capacity is acceptable and mechanical envelope permits the increased operating position.

Z-15GD55-B7-K (Omron Automation and Safety)

The Z-15GD55-B7-K provides 15A AC rating with IP62 ingress protection, offering enhanced environmental sealing compared to the original part. Operating force is fixed at 540gf, higher than the original range (255 ~ 368gf), which may affect actuation feel and force requirements. Mechanical life matches the original at 20,000,000 cycles. Operating position (0.846" / 21.5mm) requires clearance verification. Operating temperature range (-15°C ~ 80°C) is narrower than the original. RoHS Compliant status is maintained. Selection of this substitute is appropriate for applications requiring sealed operation in humid or contaminated environments where the higher operating force is acceptable.

Z-15GS55-B7-K (Omron Automation and Safety)

The Z-15GS55-B7-K provides 15A AC rating with IP62 ingress protection and operating force (250 ~ 350gf) closely matching the original specification. Mechanical life is 20,000,000 cycles, equivalent to the BZ-2R244-A2. Operating position (1.110" / 28.2mm) is significantly larger than the original (0.625" / 15.9mm), requiring substantial mechanical clearance verification. Operating temperature range (-15°C ~ 80°C) is narrower than the original. RoHS Compliant status is maintained. This substitute is suitable for sealed applications where the increased operating position can be accommodated and operating force characteristics are acceptable.

Z-15H2-B (Omron Automation and Safety)

The Z-15H2-B provides 10A AC rating with operating position (0.625" / 15.9mm) identical to the original BZ-2R244-A2, eliminating mechanical clearance concerns. Operating force (200 ~ 255gf) is slightly lower than the original range (255 ~ 368gf). Mechanical life matches the original at 20,000,000 cycles. Differential travel (0.0003" / 0.008mm) is significantly tighter than the original (0.002" / 0.05mm), indicating higher precision actuation. Operating temperature range (-25°C ~ 80°C) is narrower than the original. ROHS3 Compliant status and REACH Affected designation indicate current regulatory compliance. This substitute is suitable for applications where 10A AC capacity is sufficient, mechanical envelope is constrained, and the lower operating force is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the A-20GD-B7-K be used as a direct replacement for the BZ-2R244-A2 in all applications?

A: The A-20GD-B7-K maintains SPDT circuit configuration, On-Momentary function, round pin plunger actuator, chassis mount, and screw terminal termination. However, the operating temperature range (-25°C ~ 80°C) is narrower than the original (-55°C ~ 204°C), and mechanical life is reduced from 20,000,000 to 1,000,000 cycles. Direct replacement is appropriate only when the application operates within the narrower temperature range and cycle life requirements do not exceed 1,000,000 cycles.

Q: What is the significance of the operating position difference between the BZ-2R244-A2 and substitute parts?

A: Operating position defines the distance the actuator travels from rest to full engagement. The BZ-2R244-A2 operates at 0.625" (15.9mm). Substitute parts vary from 0.625" (Z-15H2-B) to 1.110" (Z-15GS55-B7-K). Larger operating positions require greater mechanical clearance in the application. Before selecting a substitute with different operating position, verify that the application enclosure and mechanical design can accommodate the increased travel distance without interference.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed maintain RoHS compliance. The BZ-2R244-A2, A-20GD-B7-K, Z-15GD55-B7-K, and Z-15GS55-B7-K are RoHS Compliant. The Z-15GD-B7-K and Z-15H2-B are ROHS3 Compliant, which represents an updated version of the RoHS standard. Both compliance levels are acceptable for regulatory purposes.

Q: Which substitute part most closely matches the original BZ-2R244-A2 specifications?

A: The Z-15H2-B provides the closest match in several critical parameters: identical operating position (0.625" / 15.9mm), similar operating force range (200 ~ 255gf versus 255 ~ 368gf), identical mechanical life (20,000,000 cycles), and matching differential travel precision (0.0003" / 0.008mm versus 0.002" / 0.05mm). However, the Z-15H2-B provides 10A AC rating instead of 5A AC, which is acceptable for applications where the actual load does not exceed 5A.

Q: What is the impact of DC voltage rating differences on substitution?

A: The BZ-2R244-A2 is rated for 125V DC, while all substitute parts are rated for 30V DC. If the application requires DC operation at voltages above 30V, none of the listed substitute parts are suitable. For DC applications at 30V or below, all substitute parts are acceptable. For AC-only applications, the DC voltage rating difference is not relevant to component selection.

Q: Can substitute parts with IP62 ingress protection be used in applications originally designed for non-sealed switches?

A: Yes. IP62 ingress protection (dust-tight and water-resistant to low-pressure jets) is a superset of no ingress protection specification. Parts with IP62 rating can be used in applications originally designed for non-sealed switches without functional degradation. The sealed design may introduce slightly different mechanical characteristics (such as higher operating force in Z-15GD55-B7-K at 540gf), which should be verified for compatibility with the application's actuation mechanism.

Q: What is the significance of REACH Affected status on substitute parts?

A: REACH Affected status indicates that the component contains substances of concern regulated under the REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) directive. The Z-15GD-B7-K and Z-15H2-B are marked as REACH Affected, while other substitutes are either REACH Unaffected or not specified. For applications subject to REACH compliance requirements, verify that the selected substitute part meets the specific regulatory requirements of the target market.

Q: How does operating force affect the choice of substitute parts?

A: Operating force determines the mechanical effort required to actuate the switch. The BZ-2R244-A2 requires 255 ~ 368gf. Substitute parts range from 200 ~ 255gf (Z-15H2-B, lower effort) to 540gf (Z-15GD55-B7-K, higher effort). If the application uses a mechanical actuator or lever system, verify that the actuator can provide sufficient force to operate the selected substitute. Lower operating force reduces actuation effort but may increase susceptibility to unintended activation. Higher operating force increases reliability against accidental actuation but requires more robust actuation mechanisms.

Q: Are there any packaging differences between the BZ-2R244-A2 and substitute parts?

A: The BZ-2R244-A2 is packaged as individual units (packaging not specified as bulk). All substitute parts are packaged in Bulk. Bulk packaging typically indicates higher quantity per container, which may affect procurement logistics and inventory management. Verify that bulk packaging is compatible with the procurement and storage requirements of the application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message