Honeywell 11SM423 Snap Action Switch SPDT Equivalent & Substitute Parts

Part Overview

The Honeywell 11SM423 is an active-status snap action switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 1A at 125V AC and 30V DC. This chassis-mount 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 mechanical life rated at 10,000,000 cycles. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate different operating force characteristics while maintaining core electrical and mechanical compatibility.

Substiute Parts

11SM423

Honeywell Sensing and Productivity SolutionsIn Stock: 108511SM423 Datasheet

Current PartRFQ

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 11SM423 are identified from the E-Switch MS0850500 series based on the following allowable parameters:

Maintained Compatibility Parameters:

• SPDT circuit configuration
• On-momentary switch function
• 125V AC voltage rating
• Round pin plunger actuator type
• Chassis mount configuration
• Solder lug termination style
• Active product status
• RoHS compliance

Variable Parameters Defining Substitution Groups:

• Operating force (60gf, 80gf, 250gf variants available)
• Current rating (5A AC for E-Switch variants versus 1A for Honeywell)
• Operating temperature range (-25°C to 85°C for E-Switch versus -55°C to 125°C for Honeywell)
• Mechanical life (1,000,000 cycles for E-Switch versus 10,000,000 cycles for Honeywell)

The three E-Switch models (MS0850500F060S1A, MS0850500F080S1A, MS0850500F250S1A) differ only in operating force specification, allowing selection based on actuation force requirements while maintaining all other electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration - Current Rating: The Honeywell 11SM423 is rated for 1A (AC/DC), while all E-Switch MS0850500 series substitutes are rated for 5A (AC). The higher current rating of E-Switch variants provides additional capacity margin for applications operating at or near the 1A specification. Selection of E-Switch substitutes is appropriate for circuits designed to operate within the 1A maximum current envelope.

Operating Force Selection: Three E-Switch variants are available with different operating force specifications:

• MS0850500F060S1A: 60gf operating force (lowest actuation force)
• MS0850500F080S1A: 80gf operating force (intermediate actuation force)
• MS0850500F250S1A: 250gf operating force (highest actuation force)

The Honeywell 11SM423 specifies 99gf operating force. Selection between E-Switch variants depends on application-specific actuation force requirements. The MS0850500F080S1A (80gf) provides the closest operating force characteristic to the original specification.

Temperature Range Limitation: E-Switch MS0850500 series components operate within -25°C to 85°C, which is narrower than the Honeywell 11SM423 range of -55°C to 125°C. Applications requiring operation outside the -25°C to 85°C window must retain the Honeywell part or identify alternative sources.

Mechanical Life Consideration: The Honeywell 11SM423 provides 10,000,000 cycle mechanical life, while E-Switch variants provide 1,000,000 cycles. Applications with cycle count requirements exceeding 1,000,000 cycles should retain the Honeywell specification or evaluate alternative sources.

Compliance Status: All parts maintain active product status and RoHS compliance (Honeywell RoHS Compliant; E-Switch ROHS3 Compliant), supporting continued use in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can E-Switch MS0850500 series switches directly replace the Honeywell 11SM423 in all applications?

A: E-Switch MS0850500 series switches maintain electrical compatibility (SPDT circuit, 125V AC rating, on-momentary function) and mechanical compatibility (round pin plunger, chassis mount, solder lug termination). However, three limiting factors exist: (1) Operating temperature range is restricted to -25°C to 85°C versus -55°C to 125°C for the Honeywell part; (2) Mechanical life is 1,000,000 cycles versus 10,000,000 cycles; (3) Current rating is 5A AC versus 1A AC/DC. Applications operating within -25°C to 85°C, with cycle counts below 1,000,000, and current draw below 1A are compatible with E-Switch substitutes.

Q: Which E-Switch variant should be selected if operating force is critical to the application?

A: Operating force selection depends on application requirements. The MS0850500F080S1A (80gf) provides the closest match to the Honeywell 11SM423 specification of 99gf. The MS0850500F060S1A (60gf) requires lower actuation force, while the MS0850500F250S1A (250gf) requires significantly higher actuation force. Verify that the selected operating force is compatible with the mechanical actuation mechanism in the target application.

Q: Are there DC voltage rating differences between the main part and substitutes?

A: The Honeywell 11SM423 specifies 30V DC rating. E-Switch MS0850500 series specifications provided do not include DC voltage ratings. Applications requiring DC operation should verify E-Switch DC voltage capability through the manufacturer's detailed technical documentation before substitution.

Q: What is the significance of the 0.005" difference in operating position between parts?

A: The Honeywell 11SM423 specifies 0.330" (8.4mm) operating position, while E-Switch variants specify 0.335" (8.5mm). This 0.005" (0.1mm) difference is within typical mechanical tolerance ranges for snap action switches. Mechanical mounting interfaces and actuation linkages designed for the Honeywell part will accommodate this minor dimensional variation.

Q: Can the higher current rating of E-Switch parts (5A) create compatibility issues?

A: The 5A current rating of E-Switch MS0850500 series represents maximum switch capacity. Applications designed for 1A operation will function within the E-Switch switch capacity. The higher rating does not create compatibility issues; it provides additional margin. Circuit design and load characteristics remain unchanged.

Q: What inventory status should influence substitution decisions?

A: The Honeywell 11SM423 shows 991 pieces in stock. E-Switch variants show higher inventory levels: MS0850500F060S1A (997 pieces), MS0850500F080S1A (1,250 pieces), and MS0850500F250S1A (1,404 pieces). Substitution decisions should prioritize application compatibility parameters over inventory availability.