Honeywell 412SM4 Snap Action Switch SPDT Equivalent & Substitute Parts

Part Overview

The Honeywell 412SM4 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 component features a round pin plunger actuator with solder lug termination and is designed for on-momentary switching applications. The part is RoHS compliant and maintains unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified to address inventory availability, application-specific force requirements, or enhanced current ratings while maintaining core electrical and mechanical compatibility within the SPDT snap action switch category.

Substiute Parts

412SM4

Honeywell Sensing and Productivity SolutionsIn Stock: 1069412SM4 Datasheet

Current PartRFQ

MS0850500F060S1A

E-SwitchIn Stock: 1035MS0850500F060S1A Datasheet

SimilarRFQ

MS0850500F080S1A

E-SwitchIn Stock: 1289MS0850500F080S1A Datasheet

SimilarRFQ

MS0850500F250S1A

E-SwitchIn Stock: 1435MS0850500F250S1A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 412SM4 are identified from the E-Switch MS0850500 series based on the following substitution criteria:

Maintained Parameters (Required for Substitution):

• SPDT circuit configuration
• On-momentary switch function
• 125V AC voltage rating
• Round pin plunger actuator type
• Chassis mount configuration
• Solder lug termination
• RoHS compliance
• MSL 1 rating

Variable Parameters (Differentiate Substitute Options):

• Operating force: 60gf, 80gf, or 250gf (versus 213gf in main part)
• Current rating: 5A AC (versus 1A in main part)
• Operating temperature range: -25°C to 85°C (versus -55°C to 125°C in main part)
• Mechanical life: 1,000,000 cycles (versus 10,000,000 cycles in main part)

The three E-Switch substitute models (MS0850500F060S1A, MS0850500F080S1A, MS0850500F250S1A) differ only in operating force specification, allowing selection based on application-specific actuation requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

The 412SM4 remains the specified component for applications requiring the full operating temperature range (-55°C to 125°C) and extended mechanical life (10,000,000 cycles). This part is active-status and maintains full RoHS compliance.

Substitute Selection Logic:

E-Switch MS0850500 series substitutes are applicable when:

1. Operating temperature range of -25°C to 85°C is acceptable for the application
2. Mechanical life requirement of 1,000,000 cycles is sufficient
3. Higher current capacity (5A AC versus 1A AC) is required or beneficial
4. Specific operating force characteristics are needed:
   • MS0850500F060S1A: 60gf operating force (lowest actuation force)
   • MS0850500F080S1A: 80gf operating force (moderate actuation force)
   • MS0850500F250S1A: 250gf operating force (highest actuation force, closest to 412SM4's 213gf)

All substitute parts maintain SPDT circuit configuration, on-momentary function, 125V AC rating, chassis mount configuration, solder lug termination, and MSL 1 rating. All are ROHS3 compliant and carry EAR99 ECCN classification.

Compliance Status:

The 412SM4 and all three E-Switch substitutes are active-status products with current inventory availability. All parts are RoHS compliant and unaffected by REACH regulations (E-Switch substitutes explicitly noted as REACH Unaffected).

Frequently Asked Questions (FAQ)

Q: Can MS0850500F060S1A, MS0850500F080S1A, or MS0850500F250S1A be used as direct replacements for 412SM4?

A: These E-Switch parts share the same SPDT circuit, on-momentary function, 125V AC rating, chassis mount configuration, and solder lug termination. However, they operate within a narrower temperature range (-25°C to 85°C versus -55°C to 125°C) and have reduced mechanical life (1,000,000 versus 10,000,000 cycles). Substitution is valid only when these operational constraints are acceptable for the application.

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

A: The three MS0850500 variants differ only in operating force specification: MS0850500F060S1A requires 60gf, MS0850500F080S1A requires 80gf, and MS0850500F250S1A requires 250gf. All other electrical and mechanical parameters are identical. Selection depends on the actuation force required by the application mechanism.

Q: Why do the E-Switch substitutes have higher current ratings (5A) than the 412SM4 (1A)?

A: The E-Switch MS0850500 series is rated for 5A AC at 125V, providing greater current-handling capacity. This higher rating does not prevent use in 1A applications; the component will operate safely at lower current levels. Applications requiring only 1A can use either the 412SM4 or any E-Switch substitute without derating concerns.

Q: Are there temperature or mechanical life limitations when using E-Switch substitutes?

A: Yes. E-Switch substitutes operate within -25°C to 85°C (versus 412SM4's -55°C to 125°C) and support 1,000,000 mechanical cycles (versus 412SM4's 10,000,000 cycles). Applications requiring extended temperature range or extended cycle life must use the 412SM4.

Q: What is the packaging difference between 412SM4 and E-Switch substitutes?

A: The 412SM4 is packaged as individual units with dash packaging notation. E-Switch substitutes are supplied in bulk packaging. This affects inventory management and procurement processes but does not impact electrical or mechanical compatibility.

Q: Are all parts RoHS compliant?

A: Yes. The 412SM4 is RoHS Compliant. All three E-Switch substitutes are ROHS3 Compliant. Both compliance levels meet current regulatory requirements.

Q: What is the operating position tolerance between 412SM4 and E-Switch substitutes?

A: The 412SM4 has an operating position of 0.330" (8.4mm). E-Switch substitutes have an operating position of 0.335" (8.5mm). This 0.005" (0.1mm) difference is within typical mechanical tolerance for chassis-mount snap action switches and does not affect functional compatibility in standard applications.