MT-4R-P1 Equivalent & Substitute Parts Reference

Part Overview

The MT-4R-P1 is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 10A at 125V AC/DC with a round pin plunger actuator and screw terminal connections. The product is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing applications and new designs. Substitute parts must maintain functional compatibility while accommodating differences in electrical ratings, mechanical specifications, and mounting configurations.

Substiute Parts

MT-4R-P1

Honeywell Sensing and Productivity SolutionsIn Stock: 1138MT-4R-P1 Datasheet

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GPTCNC11

ZF ElectronicsIn Stock: 740GPTCNC11 Datasheet

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TZ-1G

Omron Automation and SafetyIn Stock: 1058TZ-1G Datasheet

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Z-01HD55-B

Omron Automation and SafetyIn Stock: 1035Z-01HD55-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MT-4R-P1 is determined by the following critical parameters: circuit configuration (SPDT), switch function (On-Momentary), actuator type (round pin plunger), termination style (screw terminal), and voltage rating (125V AC minimum). The identified substitute parts maintain these core functional characteristics while varying in current rating capacity, mounting configuration, and mechanical specifications.

The three substitute parts are grouped as follows:

GPTCNC11 (ZF Electronics): Maintains SPDT circuit, On-Momentary function, round pin plunger actuator, and screw terminal termination. Rated for 15A AC at 125V. Differs in mounting type (panel mount versus chassis mount) and mechanical travel specifications. Active product status with 20,000,000 cycle mechanical life rating.

TZ-1G (Omron Automation and Safety): Maintains SPDT circuit, On-Momentary function, round pin plunger actuator, screw terminal termination, and chassis mount configuration. Rated for 1A AC/DC at 125V AC and 30V DC. Differs significantly in current capacity and includes extended operating temperature range (-65°C to 400°C). Active product status with defined electrical and mechanical life ratings.

Z-01HD55-B (Omron Automation and Safety): Maintains SPDT circuit, On-Momentary function, round pin plunger actuator, screw terminal termination, and chassis mount configuration. Rated for 100mA AC/DC at 125V AC and 30V DC. Includes IP62 ingress protection rating. Active product status with 500,000 cycle electrical life and 20,000,000 cycle mechanical life.

Parameter Comparison

Engineering Selection Recommendations

Selection of substitute parts for the obsolete MT-4R-P1 must be based on application current and voltage requirements, mounting configuration constraints, and environmental operating conditions.

For applications requiring 10A current capacity at 125V AC: The GPTCNC11 provides the closest current rating at 15A AC. This part is active and ROHS3 compliant. The primary design consideration is the panel mount configuration, which differs from the chassis mount of the original part. This substitution is suitable for applications where panel mounting is feasible or where the mounting interface can be adapted.

For applications requiring chassis mount configuration with reduced current capacity: Both TZ-1G and Z-01HD55-B maintain the chassis mount configuration of the original part. TZ-1G is rated for 1A AC/DC and is suitable for low-current applications with extended operating temperature requirements (-65°C to 400°C). Z-01HD55-B is rated for 100mA AC/DC and includes IP62 ingress protection, making it suitable for applications requiring environmental sealing. Both are active products with ROHS3 compliance.

For applications with strict compliance requirements: All substitute parts are RoHS compliant (either RoHS or ROHS3). TZ-1G and Z-01HD55-B carry ROHS3 compliance. All parts maintain MSL rating of 1 (Unlimited).

For applications with defined mechanical life requirements: GPTCNC11 and Z-01HD55-B both specify 20,000,000 cycle mechanical life. TZ-1G specifies 100,000 cycle mechanical life. Z-01HD55-B additionally specifies 500,000 cycle electrical life.

Frequently Asked Questions (FAQ)

Q: Can the GPTCNC11 directly replace the MT-4R-P1 in existing designs?

A: The GPTCNC11 maintains functional equivalence in circuit configuration (SPDT), switch function (On-Momentary), actuator type (round pin plunger), and termination style (screw terminal). However, the mounting type differs: GPTCNC11 is panel mount while MT-4R-P1 is chassis mount. Direct mechanical replacement requires design modification to accommodate the different mounting interface. The GPTCNC11 current rating of 15A AC exceeds the original 10A rating, making it suitable for applications within the original current specification.

Q: What is the primary limitation of TZ-1G as a substitute?

A: The TZ-1G is rated for 1A AC/DC, which is significantly lower than the MT-4R-P1 rating of 10A. This part is suitable only for applications where the actual circuit current does not exceed 1A. The TZ-1G maintains chassis mount configuration and identical operating position (0.625" / 15.9mm) to the original part, making it mechanically compatible for low-current applications.

Q: When should Z-01HD55-B be selected over other substitutes?

A: The Z-01HD55-B is selected for applications requiring environmental sealing (IP62 ingress protection rating) or where the circuit current does not exceed 100mA. This part provides the highest electrical life rating (500,000 cycles) among the substitutes and maintains chassis mount configuration. The Z-01HD55-B is suitable for sealed enclosure applications or environments with moisture or particulate exposure.

Q: Are all substitute parts RoHS compliant?

A: Yes. The MT-4R-P1 is RoHS Compliant. GPTCNC11, TZ-1G, and Z-01HD55-B are all RoHS compliant, with GPTCNC11 and TZ-1G carrying ROHS3 compliance designation. All parts maintain MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: What are the packaging differences among the substitute parts?

A: MT-4R-P1 packaging is specified as dash (not detailed). GPTCNC11 is supplied in Bulk packaging. TZ-1G is supplied in Tray packaging. Z-01HD55-B is supplied in Bulk packaging. Packaging selection may affect procurement quantities and handling procedures but does not affect functional performance.

Q: How do the mechanical specifications compare between the main part and substitutes?

A: Operating position varies: MT-4R-P1 is 0.625" (15.9mm), GPTCNC11 is 0.825" (21.0mm), TZ-1G is 0.625" (15.9mm), and Z-01HD55-B is 0.846" (21.5mm). Operating force ranges differ: MT-4R-P1 is 340-510gf, GPTCNC11 is 348gf, TZ-1G is 500gf, and Z-01HD55-B is 370gf. These differences may affect actuator design and force requirements in the application. TZ-1G and MT-4R-P1 share identical operating position, making TZ-1G mechanically compatible for low-current applications.

Q: What is the voltage rating compatibility for DC applications?

A: MT-4R-P1 is rated for 125V DC. GPTCNC11 does not specify DC voltage rating. TZ-1G is rated for 30V DC. Z-01HD55-B is rated for 30V DC. For applications requiring 125V DC operation, only MT-4R-P1 meets this specification among the listed parts. For applications operating at 30V DC or lower, TZ-1G and Z-01HD55-B are suitable.