Honeywell 1SM23 Snap Action Switch SPDT Equivalent & Substitute Parts

Part Overview

The Honeywell 1SM23 is an active-status snap action switch with Single Pole Double Throw (SPDT) circuit configuration, rated for 1A at 125V AC and 30V DC. This chassis-mounted switch features a round pin plunger actuator with solder lug termination and is designed for On-Momentary switching applications. The component operates across an extended temperature range of -55°C to 125°C with 80,000 mechanical cycles rated life. Substitute parts are identified to address inventory availability, extended mechanical life requirements, or higher current capacity needs while maintaining core SPDT switching functionality and chassis mount configuration.

Substiute Parts

1SM23

Honeywell Sensing and Productivity SolutionsIn Stock: 8081SM23 Datasheet

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MS0850500F060S1A

E-SwitchIn Stock: 1035MS0850500F060S1A Datasheet

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MS0850500F080S1A

E-SwitchIn Stock: 1289MS0850500F080S1A Datasheet

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MS0850500F250S1A

E-SwitchIn Stock: 1435MS0850500F250S1A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Honeywell 1SM23 are identified from the E-Switch MS0850500 series based on the following substitution criteria:

Common Electrical Parameters:

• SPDT circuit configuration maintained across all substitutes
• On-Momentary switch function preserved
• 125V AC voltage rating matched
• Chassis mount configuration with solder lug termination consistent
• Round pin plunger actuator type identical

Substitution Basis: The E-Switch MS0850500F060S1A, MS0850500F080S1A, and MS0850500F250S1A variants are grouped as substitutes because they maintain the core SPDT switching topology, identical mounting and termination methods, and compatible actuator design. These parts differ in operating force (60gf, 80gf, and 250gf respectively) and current capacity (5A AC versus 1A AC/DC), representing mechanical and electrical enhancements rather than functional deviations. All substitute parts are active-status products with RoHS3 compliance and unlimited moisture sensitivity rating.

Key Differentiating Parameters for Selection:

• Operating Force: 141gf (1SM23) versus 60gf, 80gf, or 250gf (substitutes)
• Current Rating: 1A (1SM23) versus 5A AC (substitutes)
• Mechanical Life: 80,000 cycles (1SM23) versus 1,000,000 cycles (substitutes)
• Operating Temperature: -55°C to 125°C (1SM23) versus -25°C to 85°C (substitutes)

Parameter Comparison

Engineering Selection Recommendations

Substitution Compatibility Assessment:

The E-Switch MS0850500 series substitutes maintain functional equivalence to the Honeywell 1SM23 for SPDT switching applications where the following conditions are met:

1. Electrical Compatibility: All substitute parts support 125V AC operation. Applications limited to DC operation at 30V require the original 1SM23, as substitute parts do not specify DC voltage ratings.

2. Current Capacity: Substitute parts rated at 5A AC exceed the 1SM23 current specification of 1A AC/DC. Selection of 5A-rated substitutes is appropriate for applications requiring higher current capacity or where future design margin is necessary.

3. Mechanical Life: E-Switch substitutes provide 1,000,000 mechanical cycles compared to 80,000 cycles for the 1SM23. Applications requiring extended operational life benefit from substitute selection.

4. Operating Force Variants: Three operating force options (60gf, 80gf, 250gf) are available among substitutes. Selection depends on actuator sensitivity requirements. The 1SM23 operates at 141gf, positioning the 80gf variant as the closest mechanical match and the 60gf variant as the most sensitive option.

5. Temperature Range: The 1SM23 operates from -55°C to 125°C, while all E-Switch substitutes operate from -25°C to 85°C. Applications requiring extended low-temperature operation below -25°C require the original 1SM23.

6. Compliance Status: All parts maintain RoHS compliance and unlimited moisture sensitivity rating (MSL 1), supporting equivalent environmental qualification requirements.

7. Inventory Availability: E-Switch substitutes are available in higher quantities (997 to 1,404 pieces) compared to the 1SM23 (720 pieces), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the E-Switch MS0850500F080S1A directly replace the Honeywell 1SM23 in all applications?

A: The MS0850500F080S1A maintains SPDT circuit configuration, On-Momentary function, 125V AC rating, chassis mount configuration, and solder lug termination identical to the 1SM23. However, direct replacement is limited by three factors: (1) the substitute does not specify DC voltage rating, restricting use in DC-only applications; (2) operating temperature range is reduced from -55°C to 125°C to -25°C to 85°C; (3) operating force differs at 80gf versus 141gf. Applications meeting these constraints support direct substitution.

Q: What is the difference between the three E-Switch substitute variants?

A: The MS0850500F060S1A, MS0850500F080S1A, and MS0850500F250S1A differ exclusively in operating force and release force specifications. The F060 variant requires 60gf operating force with 25gf release force, the F080 variant requires 80gf operating force with 25gf release force, and the F250 variant requires 250gf operating force with 50gf release force. All other electrical and mechanical parameters remain identical across the three variants.

Q: Is the higher current rating of the E-Switch substitutes (5A versus 1A) a concern?

A: Higher current rating does not create compatibility issues. The 5A rating of E-Switch substitutes represents increased capacity beyond the 1A requirement of the 1SM23. Applications designed for 1A operation function correctly with 5A-rated components. The higher rating provides design margin and supports applications requiring increased current capacity without component redesign.

Q: What packaging differences exist between the 1SM23 and E-Switch substitutes?

A: The 1SM23 is specified with "-" packaging notation, while E-Switch substitutes are supplied in Bulk packaging. Both configurations support solder lug termination and chassis mount installation. Bulk packaging indicates standard industrial packaging without specialized protective measures, appropriate for standard component handling and assembly processes.

Q: Which substitute part should be selected for applications requiring the closest mechanical match to the 1SM23?

A: The MS0850500F080S1A provides the closest operating force match at 80gf compared to the 1SM23 at 141gf. This variant minimizes actuator sensitivity differences while maintaining all other electrical and mounting compatibility. Applications sensitive to actuator force characteristics should prioritize this variant.

Q: Are there temperature-related limitations when substituting with E-Switch parts?

A: Yes. The E-Switch MS0850500 series operates from -25°C to 85°C, while the 1SM23 operates from -55°C to 125°C. Applications requiring operation below -25°C or above 85°C require the original 1SM23. Applications within the -25°C to 85°C range support E-Switch substitution without temperature-related constraints.