BZ-2RN702 Equivalent & Substitute Parts

Part Overview

The BZ-2RN702 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This panel mount switch is rated for 15A AC at 125V and 500mA DC at 125V, featuring an overtravel plunger actuator with screw terminal connections. The product is active and RoHS compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the BZ-2RN702 is unavailable, when alternative mechanical characteristics are required for specific applications, or when different ingress protection ratings are needed for environmental conditions.

Key Parameters

Parameter	BZ-2RN702 Value
Circuit Configuration	SPDT
Switch Function	On-Momentary
Current Rating (AC)	15A
Current Rating (DC)	500mA
Voltage Rating (AC)	125V
Voltage Rating (DC)	125V
Actuator Type	Overtravel Plunger
Mounting Type	Panel Mount
Termination Style	Screw Terminal
Operating Temperature Range	-55°C to 85°C
Mechanical Life	20,000,000 Cycles
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the BZ-2RN702 is determined by the following critical parameters:

Primary Compatibility Criteria:

Circuit configuration must be SPDT
Switch function must be On-Momentary
Mounting type must be Panel Mount
Termination style must be Screw Terminal
AC voltage rating must support 125V minimum

Secondary Compatibility Criteria:

Current rating (AC) must equal or exceed 15A
Current rating (DC) must equal or exceed 500mA
DC voltage rating must support 125V or higher
Operating temperature range must encompass the application requirements

Mechanical Variation Allowances:

Actuator type may vary (overtravel plunger, roller plunger, cross roller plunger)
Operating position, pretravel, and overtravel may differ
Operating force and release force may vary within functional limits
Ingress protection rating may be enhanced (IP00 to IP65/IP62)

The substitute parts listed below meet the primary compatibility criteria and maintain functional equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Parameter	BZ-2RN702	Z-15GQ8-B	A-20GQ22-B	Z-15GQ2155-B	A-20GQ-B	Z-01HQ-B	HBS2KCB4SJ055C	X-10GQ22-B	Z-15GQ21-B	Z-15GQ55-B
Manufacturer	Honeywell	Omron	Omron	Omron	Omron	Omron	C&K	Omron	Omron	Omron
Circuit	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT
Switch Function	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom	On-Mom
Current Rating (AC)	15A	15A	20A	15A	20A	100mA	20A	—	15A	15A
Current Rating (DC)	500mA	6A	6A	6A	6A	100mA	500mA	10A	6A	6A
Voltage Rating (AC)	125V	125V	125V	125V	125V	125V	125V	—	125V	125V
Voltage Rating (DC)	125V	30V	30V	30V	30V	30V	125V	30V	30V	30V
Actuator Type	Overtravel Plunger	Overtravel Plunger	Roller Plunger	Cross Roller Plunger	Overtravel Plunger	Overtravel Plunger	Overtravel Plunger	Roller Plunger	Cross Roller Plunger	Overtravel Plunger
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal
Ingress Protection	—	IP00	IP00	IP62	IP00	IP00	IP65	IP00	IP00	IP62
Operating Temperature	-55°C to 85°C	-25°C to 80°C	-25°C to 80°C	-15°C to 80°C	-25°C to 80°C	-25°C to 80°C	-55°C to 150°C	-25°C to 80°C	-25°C to 80°C	-15°C to 80°C
Mechanical Life	20,000,000 Cycles	10,000,000 Cycles	1,000,000 Cycles	10,000,000 Cycles	1,000,000 Cycles	20,000,000 Cycles	—	1,000,000 Cycles	10,000,000 Cycles	10,000,000 Cycles
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (15A AC, 125V AC, 500mA+ DC):

The following parts maintain the same AC current rating and voltage specifications as the BZ-2RN702:

Z-15GQ8-B (Omron): Identical 15A AC and 125V AC ratings. DC voltage rating is 30V, which is lower than the original 125V DC specification. Mechanical life is 10,000,000 cycles versus 20,000,000 cycles on the original. ROHS3 compliant.
Z-15GQ21-B (Omron): Identical 15A AC and 125V AC ratings. DC voltage rating is 30V. Mechanical life is 10,000,000 cycles. Cross roller plunger actuator. ROHS3 compliant.
Z-15GQ2155-B (Omron): Identical 15A AC and 125V AC ratings. DC voltage rating is 30V. Mechanical life is 10,000,000 cycles. IP62 ingress protection. ROHS3 compliant.
Z-15GQ55-B (Omron): Identical 15A AC and 125V AC ratings. DC voltage rating is 30V. Mechanical life is 10,000,000 cycles. IP62 ingress protection. ROHS3 compliant.

Higher Current Capacity Alternatives (20A AC, 125V AC):

These parts exceed the AC current rating of the BZ-2RN702 and are suitable for applications requiring higher current capacity:

A-20GQ22-B (Omron): 20A AC at 125V AC. DC voltage rating is 30V. Mechanical life is 1,000,000 cycles. Roller plunger actuator. ROHS3 compliant.
A-20GQ-B (Omron): 20A AC at 125V AC. DC voltage rating is 30V. Mechanical life is 1,000,000 cycles. Overtravel plunger actuator. RoHS compliant.
HBS2KCB4SJ055C (C&K): 20A AC at 125V AC with 500mA DC at 125V DC. Maintains the same DC voltage specification as the original. Operating temperature range extends to 150°C. IP65 ingress protection. ROHS3 compliant.

Low Current Application (100mA AC/DC, 125V AC):

Z-01HQ-B (Omron): Suitable only for low-current applications requiring 100mA or less. DC voltage rating is 30V. Mechanical life is 20,000,000 cycles. ROHS3 compliant.

DC-Only Application (10A DC, 30V DC):

X-10GQ22-B (Omron): Suitable only for DC applications at 10A and 30V DC. No AC rating specified. Mechanical life is 1,000,000 cycles. ROHS3 compliant.

Compliance Considerations:

All substitute parts are RoHS or ROHS3 compliant. Parts designated ROHS3 compliant represent updated compliance status. The BZ-2RN702 is RoHS compliant. All parts carry ECCN EAR99 classification and are suitable for general commercial applications.

Frequently Asked Questions (FAQ)

Q: Can Z-15GQ8-B replace BZ-2RN702 in all applications?

A: Z-15GQ8-B matches the AC specifications (15A at 125V) but has a reduced DC voltage rating of 30V compared to the original 125V DC. It is suitable for replacement only in applications where DC voltage does not exceed 30V. Mechanical life is also reduced from 20,000,000 to 10,000,000 cycles.

Q: What is the difference between the Omron Z-series parts listed?

A: The Z-series parts (Z-15GQ8-B, Z-15GQ21-B, Z-15GQ2155-B, Z-15GQ55-B) all maintain 15A AC at 125V AC ratings but differ in actuator type, ingress protection rating, and operating position. Z-15GQ2155-B and Z-15GQ55-B offer IP62 protection for environments requiring dust and moisture resistance. Z-15GQ21-B and Z-15GQ2155-B use cross roller plungers, while Z-15GQ8-B and Z-15GQ55-B use overtravel plungers.

Q: When should I use A-20GQ-B or A-20GQ22-B instead of the original BZ-2RN702?

A: These Omron parts are rated for 20A AC at 125V AC, providing higher current capacity than the 15A rating of the BZ-2RN702. Use these parts when the application requires higher AC current handling. Note that DC voltage rating is limited to 30V, and mechanical life is reduced to 1,000,000 cycles.

Q: Is HBS2KCB4SJ055C from C&K a complete equivalent?

A: HBS2KCB4SJ055C is the closest functional equivalent. It maintains 20A AC at 125V AC and 500mA DC at 125V DC, matching the DC voltage specification of the original. It offers enhanced IP65 ingress protection and extended operating temperature range to 150°C. However, mechanical life specification is not provided in the data.

Q: What does IP62 or IP65 ingress protection mean for switch selection?

A: IP62 provides protection against dust ingress and water spray from any direction. IP65 provides complete dust protection and water jet resistance. The original BZ-2RN702 has no specified ingress protection rating (standard IP00 equivalent). Select IP62 or IP65 rated parts only when the application environment requires protection against dust or moisture exposure.

Q: Can X-10GQ22-B be used as a substitute?

A: X-10GQ22-B is not suitable as a general substitute. It is rated for 10A DC at 30V DC only, with no AC rating. Use this part only in DC-only applications where current does not exceed 10A and voltage does not exceed 30V.

Q: Can Z-01HQ-B be used as a substitute?

A: Z-01HQ-B is not suitable for the standard BZ-2RN702 application. It is rated for only 100mA AC/DC, which is significantly lower than the 15A AC and 500mA DC ratings of the original. Use this part only in low-current signal switching applications.

Q: What is the difference between RoHS and ROHS3 compliance?

A: Both designations indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the updated version of the standard. All listed substitute parts are compliant with their respective standards and are suitable for commercial applications requiring RoHS compliance.

Q: Does packaging type (Bulk vs. Tray) affect electrical performance?

A: No. Packaging type (Bulk or Tray) affects only handling, storage, and logistics. It does not affect electrical or mechanical performance of the switch. Select based on your procurement and inventory management requirements.

Q: What operating temperature range should I consider for substitution?

A: The BZ-2RN702 operates from -55°C to 85°C. Most Omron Z-series and A-series substitutes operate from -25°C to 80°C, which is narrower. If your application requires operation below -25°C or above 80°C, verify the substitute part's temperature range. HBS2KCB4SJ055C extends to 150°C on the high end.

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