Equivalent & Substitute Parts for Honeywell 1SM3 SPDT Snap Action Switch

Part Overview

The Honeywell 1SM3 is an SPDT (Single Pole Double Throw) snap action switch rated for 5A at 250V 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 part is Active in product status and RoHS Compliant, with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and circuit configuration requirements must be met within specified tolerance ranges.

Substiute Parts

1SM3

Honeywell Sensing and Productivity SolutionsIn Stock: 10191SM3 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 Honeywell 1SM3 are identified from the E-Switch MS series based on the following substitution criteria:

Matching Parameters (Required):

• Circuit configuration: SPDT
• Current rating: 5A (AC)
• Actuator type: Round (Pin Plunger)
• Mounting type: Chassis Mount
• Termination style: Solder Lug
• Product status: Active
• RoHS compliance: Present (ROHS3 Compliant)

Voltage Consideration: The substitute parts (MS0850500F060S1A, MS0850500F080S1A, MS0850500F250S1A) are rated for 125V AC. These parts operate at a lower voltage rating than the main part (250V AC). Substitution is valid only when the application voltage requirement does not exceed 125V AC.

Operating Force Variants: Three substitute models are provided with different operating force specifications (60gf, 80gf, 250gf), allowing selection based on specific actuation requirements within the same electrical and mechanical framework.

Parameter Comparison

Engineering Selection Recommendations

Voltage Compatibility Assessment: The Honeywell 1SM3 is rated for 250V AC operation. The E-Switch MS series substitutes are rated for 125V AC maximum. Selection of substitute parts is limited to applications where the operating voltage does not exceed 125V AC. For applications requiring 250V AC operation, the Honeywell 1SM3 remains the specified component.

Operating Force Selection: Three E-Switch substitute models provide different operating force characteristics:

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

Selection among these variants depends on the specific mechanical actuation force required by the application. The Honeywell 1SM3 operates at 141gf, placing it between the 80gf and 250gf E-Switch options.

Temperature Range Consideration: The Honeywell 1SM3 operates across -55°C to 125°C. The E-Switch substitutes operate across -25°C to 85°C. Applications requiring operation below -25°C or above 85°C must retain the Honeywell 1SM3.

Regulatory Compliance: All parts maintain RoHS compliance and MSL 1 rating. E-Switch substitutes carry ROHS3 Compliant status and REACH Unaffected designation, meeting current regulatory requirements.

Mechanical Life: E-Switch substitutes provide 1,000,000 mechanical cycles, exceeding the Honeywell 1SM3 specification of 80,000 cycles. This represents improved mechanical durability for extended-life applications.

Frequently Asked Questions (FAQ)

Q: Can E-Switch MS series switches replace the Honeywell 1SM3 in all applications?

A: No. Substitution is valid only when the application voltage requirement does not exceed 125V AC. The Honeywell 1SM3 is rated for 250V AC and 30V DC, while E-Switch substitutes are rated for 125V AC only. For applications exceeding 125V AC, the Honeywell 1SM3 must be used.

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

A: The three E-Switch models (MS0850500F060S1A, MS0850500F080S1A, MS0850500F250S1A) differ in operating force and release force specifications. The "F060," "F080," and "F250" designations indicate 60gf, 80gf, and 250gf operating forces respectively. All other electrical and mechanical parameters remain identical across the three variants.

Q: Are the operating position differences significant?

A: The Honeywell 1SM3 operates at 0.330" (8.4mm), while E-Switch substitutes operate at 0.335" (8.5mm). This 0.005" (0.1mm) difference is within typical mechanical tolerance and does not affect functional compatibility in standard chassis-mount applications.

Q: Do the E-Switch substitutes support DC voltage operation?

A: The provided specifications for E-Switch substitutes list only AC voltage ratings (125V AC). DC voltage capability is not specified for these parts. Applications requiring DC operation should retain the Honeywell 1SM3, which is rated for 30V DC.

Q: What is the impact of the different temperature ranges?

A: The Honeywell 1SM3 operates from -55°C to 125°C, while E-Switch substitutes operate from -25°C to 85°C. Applications requiring operation below -25°C or above 85°C must use the Honeywell 1SM3. Standard industrial applications within -25°C to 85°C can use either part.

Q: How do the mechanical life ratings compare?

A: The Honeywell 1SM3 specifies 80,000 mechanical cycles. E-Switch substitutes specify 1,000,000 mechanical cycles, representing a 12.5x improvement in mechanical durability. For high-cycle applications, E-Switch substitutes provide extended service life.

Q: Are all parts RoHS compliant?

A: Yes. The Honeywell 1SM3 is RoHS Compliant. E-Switch substitutes are ROHS3 Compliant. Both designations meet current RoHS requirements. E-Switch substitutes additionally carry REACH Unaffected status.

Q: What packaging is available?

A: The Honeywell 1SM3 is supplied in standard packaging. E-Switch substitutes are supplied in Bulk packaging. Confirm packaging requirements with procurement specifications before ordering.