BZ-2RQ181T Equivalent & Substitute Parts Reference

Part Overview

The BZ-2RQ181T is an active-status snap action switch manufactured by Honeywell Sensing and Productivity Solutions. This SPDT panel mount switch is rated for 15A AC at 125V and 500mA DC at 125V, featuring a roller plunger actuator with screw terminal connections. The switch operates with an On-Momentary function and is designed for applications requiring reliable snap action switching with mechanical life rated at 20,000,000 cycles. Equivalent and substitute parts are identified for applications where component availability, specific parameter requirements, or supply chain considerations necessitate alternative sourcing.

Substiute Parts

BZ-2RQ181T

Honeywell Sensing and Productivity SolutionsIn Stock: 1082BZ-2RQ181T Datasheet

Current PartRFQ

GPTCRH11

ZF ElectronicsIn Stock: 800GPTCRH11 Datasheet

SimilarRFQ

Z-15HQ22-B

Omron Automation and SafetyIn Stock: 1218Z-15HQ22-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2RQ181T is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Momentary
• AC current rating must be 15A minimum
• AC voltage rating must be 125V minimum
• Actuator type must be Roller Plunger
• Mounting type must be Panel Mount
• Termination style must be Screw Terminal
• Mechanical life must be 20,000,000 cycles minimum

Identified Substitute Parts:

The GPTCRH11 (ZF Electronics) meets all primary substitution criteria with matching SPDT circuit, On-Momentary function, 15A AC rating at 125V, roller plunger actuator, panel mount configuration, and screw terminal termination. Mechanical life is rated at 20,000,000 cycles. Operating temperature range is 0°C to 55°C, which is narrower than the main part.

The Z-15HQ22-B (Omron Automation and Safety) meets all primary substitution criteria with matching SPDT circuit, On-Momentary function, 15A AC rating at 125V, roller plunger actuator, panel mount configuration, and screw terminal termination. Mechanical life is rated at 20,000,000 cycles. Operating temperature range is -25°C to 80°C. DC current rating is 2A at 30V, which differs from the main part specification of 500mA at 125V.

Parameter Comparison

Engineering Selection Recommendations

BZ-2RQ181T (Honeywell Sensing and Productivity Solutions): Primary selection for applications requiring the full specified operating temperature range of -55°C to 85°C and DC current capability of 500mA at 125V. RoHS Compliant status. Current inventory: 1046 pieces.

GPTCRH11 (ZF Electronics): Suitable for applications operating within the 0°C to 55°C temperature range where AC current requirements are 15A at 125V. ROHS3 Compliant status. Current inventory: 700 pieces. Operating force specification of 348gf falls within the range of the main part. Operating position differs by 0.047" (1.2mm) from the main part.

Z-15HQ22-B (Omron Automation and Safety): Suitable for applications operating within the -25°C to 80°C temperature range where AC current requirements are 15A at 125V. ROHS3 Compliant status with REACH Affected designation. Current inventory: 1127 pieces. Operating temperature range overlaps substantially with the main part. DC current rating of 2A at 30V differs from the main part specification. Electrical life rating of 500,000 cycles is specified. IP00 ingress protection rating is specified.

All three parts share identical mechanical life ratings of 20,000,000 cycles, SPDT circuit configuration, On-Momentary function, roller plunger actuator, panel mount configuration, and screw terminal termination.

Frequently Asked Questions (FAQ)

Q: Can GPTCRH11 be used as a direct replacement for BZ-2RQ181T in all applications?

A: GPTCRH11 is suitable for applications where the operating temperature range does not exceed 0°C to 55°C. The main part BZ-2RQ181T operates from -55°C to 85°C. If your application requires operation below 0°C or above 55°C, GPTCRH11 is not appropriate. Both parts share identical AC current and voltage ratings, actuator type, mounting configuration, and termination style.

Q: What are the key differences between Z-15HQ22-B and BZ-2RQ181T?

A: The primary differences are: (1) Operating temperature range: Z-15HQ22-B operates from -25°C to 80°C versus BZ-2RQ181T from -55°C to 85°C; (2) DC current rating: Z-15HQ22-B is rated 2A at 30V versus BZ-2RQ181T at 500mA at 125V; (3) Electrical life: Z-15HQ22-B specifies 500,000 cycles versus BZ-2RQ181T with no electrical life specification; (4) Ingress protection: Z-15HQ22-B is rated IP00. AC current and voltage ratings, circuit configuration, and mechanical life are identical.

Q: Are all three parts RoHS compliant?

A: BZ-2RQ181T is RoHS Compliant. GPTCRH11 and Z-15HQ22-B are both ROHS3 Compliant. All three parts meet RoHS requirements. Z-15HQ22-B carries additional REACH Affected designation.

Q: What is the significance of the operating force differences shown in the parameter comparison?

A: Operating force determines the physical effort required to actuate the switch. BZ-2RQ181T specifies 255–368gf, GPTCRH11 specifies 348gf (within the BZ-2RQ181T range), and Z-15HQ22-B specifies 200–285gf. These differences may affect tactile feedback and mechanical interface design. Selection should account for the specific actuator mechanism in your application.

Q: Can these parts be used interchangeably in DC applications?

A: No. DC current and voltage ratings differ significantly. BZ-2RQ181T is rated 500mA at 125V DC. Z-15HQ22-B is rated 2A at 30V DC. GPTCRH11 does not specify DC ratings. For DC applications, verify that the selected part meets your specific DC current and voltage requirements.

Q: What packaging options are available?

A: BZ-2RQ181T is supplied in standard packaging. GPTCRH11 and Z-15HQ22-B are supplied in Bulk packaging. Confirm packaging requirements with your procurement process.