BZ-2RQ128T Equivalent & Substitute Parts

Part Overview

The BZ-2RQ128T is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, configured as a single-pole double-throw (SPDT) panel mount device rated for 15A at 125V AC and 500mA at 125V DC. This component features an overtravel plunger actuator with screw terminal connections and is designed for momentary on-off switching applications.

The BZ-2RQ128T is classified as obsolete. Equivalent substitute parts are necessary to maintain system functionality and ensure continued availability for applications currently utilizing this component.

Substiute Parts

BZ-2RQ128T

Honeywell Sensing and Productivity SolutionsIn Stock: 1076BZ-2RQ128T Datasheet

Current PartRFQ

GPTCNH01

ZF ElectronicsIn Stock: 862GPTCNH01 Datasheet

SimilarRFQ

GPTCNH11

ZF ElectronicsIn Stock: 1119GPTCNH11 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZ-2RQ128T is determined by equivalence in the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration (SPDT)
• Switch function (On-Mom momentary operation)
• Current rating (15A AC minimum)
• Voltage rating (125V AC minimum)
• Actuator type (Overtravel plunger)
• Mounting type (Panel mount)
• Termination style (Screw terminal)
• Mechanical life (20,000,000 cycles)

Secondary Compatibility Parameters:

• Operating force range
• Release force
• Operating position tolerance
• Pretravel and differential travel specifications
• Overtravel distance
• Operating temperature range
• RoHS and MSL compliance

The substitute parts GPTCNH01 and GPTCNH11 (both ZF Electronics, GP series) satisfy the primary substitution criteria. Both parts maintain SPDT configuration, momentary switching function, 15A AC current rating, 125V AC voltage rating, overtravel plunger actuation, panel mount configuration, and screw terminal termination. Both achieve 20,000,000 mechanical life cycles and comply with RoHS3 and MSL 1 specifications.

Operating force values differ between the main part (255–368 gf) and substitute parts (348 gf fixed), and operating temperature ranges differ (main part: −55°C to 85°C; substitutes: 0°C to 55°C). These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The BZ-2RQ128T is classified as obsolete. Both GPTCNH01 and GPTCNH11 are active products from ZF Electronics, ensuring ongoing availability and supply chain continuity.

Compliance and Certification: All three parts comply with RoHS requirements. The BZ-2RQ128T carries RoHS Compliant status, while GPTCNH01 and GPTCNH11 carry ROHS3 Compliant status, reflecting current regulatory standards. All parts maintain MSL 1 (Unlimited) moisture sensitivity classification and EAR99 export control designation.

Electrical Equivalence: GPTCNH01 and GPTCNH11 maintain identical SPDT circuit configuration, momentary switching function, 15A AC current rating, and 125V AC voltage rating as the BZ-2RQ128T. DC current and voltage specifications are not provided for the substitute parts; applications requiring DC operation at 500mA and 125V DC must evaluate substitute suitability independently.

Mechanical and Operational Differences: Operating force in the BZ-2RQ128T ranges from 255–368 gf, while both substitute parts specify a fixed 348 gf operating force. The operating position differs slightly: BZ-2RQ128T at 0.859" (21.8 mm) versus substitutes at 0.825" (21.0 mm). Operating temperature range is narrower in substitute parts (0°C to 55°C) compared to the main part (−55°C to 85°C).

Selection Basis: Choose GPTCNH01 or GPTCNH11 when the application operates within 0°C to 55°C temperature range and does not require DC operation specifications. Both substitute parts are functionally equivalent for AC applications within the specified temperature envelope. GPTCNH11 is listed as a direct substitute in the BZ-2RQ128T documentation.

Frequently Asked Questions (FAQ)

Q: Can GPTCNH01 or GPTCNH11 directly replace BZ-2RQ128T in all applications?

A: Both GPTCNH01 and GPTCNH11 are functionally equivalent for AC applications operating within 0°C to 55°C. Applications requiring operation below 0°C or above 55°C, or applications utilizing DC operation at 500mA and 125V DC, require evaluation of substitute suitability against specific application parameters.

Q: What are the key differences between BZ-2RQ128T and the substitute parts?

A: Operating temperature range differs: BZ-2RQ128T operates from −55°C to 85°C, while GPTCNH01 and GPTCNH11 operate from 0°C to 55°C. Operating force is specified as a range (255–368 gf) for BZ-2RQ128T and as a fixed value (348 gf) for substitutes. Operating position differs by 0.034" (0.8 mm). DC electrical specifications are not provided for substitute parts.

Q: Are GPTCNH01 and GPTCNH11 interchangeable with each other?

A: GPTCNH01 and GPTCNH11 share identical electrical and mechanical specifications. Both are ZF Electronics GP series parts with 15A AC, 125V AC rating, overtravel plunger actuation, panel mount configuration, and screw terminal termination. Both achieve 20,000,000 mechanical life cycles and comply with ROHS3 and MSL 1 standards.

Q: Why is the BZ-2RQ128T classified as obsolete?

A: The BZ-2RQ128T is no longer in active production. GPTCNH01 and GPTCNH11 are active products from ZF Electronics that provide equivalent functionality and ensure supply chain availability.

Q: What is the significance of the operating force difference?

A: The BZ-2RQ128T specifies operating force as a range (255–368 gf), while substitute parts specify a fixed value (348 gf). The substitute value falls within the original range. Applications sensitive to actuation force characteristics must evaluate whether fixed-value operation is acceptable.

Q: Do the substitute parts support DC operation?

A: DC electrical specifications are not provided for GPTCNH01 or GPTCNH11. The BZ-2RQ128T supports 500mA at 125V DC. Applications requiring DC operation must obtain DC specifications from ZF Electronics or evaluate substitute suitability through testing.

Q: What is the impact of the narrower operating temperature range in substitute parts?

A: GPTCNH01 and GPTCNH11 operate from 0°C to 55°C, compared to BZ-2RQ128T range of −55°C to 85°C. Applications operating below 0°C or above 55°C cannot use these substitutes without additional evaluation.

Q: Are packaging considerations relevant to substitution?

A: BZ-2RQ128T packaging is listed as dash (not specified). GPTCNH01 and GPTCNH11 are supplied in bulk packaging. Procurement and handling procedures may differ based on packaging format.