Equivalent & Substitute Parts for Honeywell 1MT1-8 Toggle Switch

Part Overview

The Honeywell 1MT1-8 is a panel-mounted toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 5A DC at 28V. This component features a standard round actuator with 16.87mm length, non-illuminated design, and IP67 ingress protection. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where legacy component specifications must be maintained.

Substiute Parts

1MT1-8

Honeywell Sensing and Productivity SolutionsIn Stock: 10691MT1-8 Datasheet

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3635NF/2

APEM Inc.In Stock: 10093635NF/2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 1MT1-8 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Circuit configuration: SPDT
• Switch function: On-Mom
• DC voltage rating: minimum 28V
• DC current rating: minimum 5A
• Mounting type: Panel Mount
• Actuator type: Standard Round
• Operating temperature range: -40°C to 85°C or broader
• Panel cutout compatibility: circular aperture approximately 12.2mm to 12.45mm diameter

Acceptable Variation Parameters:

• Actuator length: within ±1.0mm tolerance for panel clearance
• Electrical life: equal to or exceeding 60,000 cycles
• Ingress protection: IP67 or equivalent sealed design
• Termination style: different connector types acceptable if mechanical fit permits

The APEM Inc. 3635NF/2 meets these substitution criteria through equivalent SPDT circuit topology, On-Mom function, DC voltage and current ratings that equal or exceed the original specification, compatible panel mount configuration, and matching operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Electrical Life Specification

The APEM 3635NF/2 substitute part specifies 10,000 electrical cycles, which is substantially lower than the Honeywell 1MT1-8 specification of 60,000 cycles. This represents a 6:1 reduction in rated cycle life. Applications requiring the full 60,000-cycle operational life of the original component cannot use this substitute without accepting reduced component longevity.

Compliance Status

Both parts maintain RoHS compliance (Honeywell: RoHS Compliant; APEM: ROHS3 Compliant), satisfying environmental regulatory requirements. The APEM part additionally carries REACH Unaffected status, providing additional regulatory documentation.

Mechanical Compatibility

Panel cutout diameter difference of 0.25mm and actuator length difference of 0.63mm fall within standard mechanical tolerances for panel-mounted switch installations. Both parts utilize circular panel apertures and standard round actuators, permitting direct mechanical substitution in existing panel designs.

Electrical Performance

The APEM 3635NF/2 exceeds the original DC current rating (12A versus 5A) and matches the DC voltage rating (28V). This electrical superiority does not create compatibility issues and provides operational margin.

Termination Consideration

Honeywell 1MT1-8 uses Solder and Quick Connect 0.110" (2.8mm) termination. APEM 3635NF/2 uses Quick Connect 0.250" (6.3mm) termination. Connector compatibility must be verified against the specific wiring harness or PCB design in the application.

Frequently Asked Questions (FAQ)

Q: Can the APEM 3635NF/2 directly replace the Honeywell 1MT1-8 in all applications?

A: Direct mechanical and electrical substitution is possible for applications that do not require the full 60,000-cycle electrical life specification. The reduced cycle life rating of the APEM part (10,000 cycles) must be evaluated against actual application duty cycles. Connector termination style differences require verification of compatibility with existing wiring interfaces.

Q: What is the significance of the electrical life difference between these parts?

A: Electrical life rating indicates the number of switching cycles a component can perform while maintaining specified electrical performance. The Honeywell 1MT1-8 is rated for 60,000 cycles; the APEM 3635NF/2 is rated for 10,000 cycles. Applications with high switching frequency or long operational life requirements may exceed the APEM part's rated cycle life, potentially resulting in premature contact wear or failure.

Q: Are the panel cutout dimensions compatible?

A: The Honeywell 1MT1-8 requires a 12.45mm diameter circular aperture; the APEM 3635NF/2 requires a 12.20mm diameter circular aperture. The 0.25mm difference is within standard mechanical tolerances for panel cutout machining. Existing panel apertures designed for the Honeywell part will accommodate the APEM substitute.

Q: What is the difference between the termination styles?

A: The Honeywell 1MT1-8 uses Quick Connect terminals with 0.110" (2.8mm) blade width. The APEM 3635NF/2 uses Quick Connect terminals with 0.250" (6.3mm) blade width. These are different connector sizes. Compatibility depends on whether the wiring harness or PCB receptacles can accept the larger 0.250" blade. Physical verification is required before substitution.

Q: Do both parts meet current environmental regulations?

A: Yes. The Honeywell 1MT1-8 is RoHS Compliant. The APEM 3635NF/2 is ROHS3 Compliant and REACH Unaffected. Both parts satisfy current environmental compliance requirements for electronic component use in regulated markets.

Q: What is the actuator length difference impact?

A: The Honeywell 1MT1-8 has a 16.87mm actuator length; the APEM 3635NF/2 has a 17.50mm actuator length. The 0.63mm difference is negligible for standard panel-mounted applications. Panel clearance and operator access considerations remain unchanged.

Q: Can the APEM part handle the same current and voltage as the Honeywell part?

A: Yes. The APEM 3635NF/2 is rated for 12A DC at 28V, which exceeds the Honeywell 1MT1-8 specification of 5A DC at 28V. The substitute part provides superior electrical capacity and will not be overstressed in applications designed for the original component.