111SM1-T2 Equivalent & Substitute Parts Reference

Part Overview

The 111SM1-T2 is a snap action SPDT (Single Pole Double Throw) switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch is rated for 5A at 250V AC and 30V DC, featuring a straight lever actuator with solder turret termination. The product is Active status and RoHS Compliant, designed for applications requiring reliable on-momentary switching action with high mechanical durability.

Equivalent and substitute parts are identified when alternative components meet the core electrical and mechanical requirements for SPDT snap action switching applications while maintaining compatibility with the intended circuit and mounting configuration.

Substiute Parts

111SM1-T2

Honeywell Sensing and Productivity SolutionsIn Stock: 863111SM1-T2 Datasheet

Current PartRFQ

DC1C-A1RB

ZF ElectronicsIn Stock: 875DC1C-A1RB Datasheet

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MMGGD1L0C

C&KIn Stock: 1169MMGGD1L0C Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 111SM1-T2 is determined by the following core parameters:

Primary Electrical Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Mom
• Current rating must meet or exceed 5A for the intended voltage domain
• Voltage ratings must support both the AC (250V) and DC (30V) operating requirements, or the application-specific voltage requirement

Mechanical Compatibility Criteria:

• Mounting type must be Chassis Mount
• Actuator type should be Lever configuration for form-factor compatibility
• Termination style compatibility with solder-based connections

Environmental & Compliance Criteria:

• Operating temperature range must encompass or overlap the -55°C to 125°C specification
• RoHS compliance status must be current (RoHS Compliant or ROHS3 Compliant)
• Moisture Sensitivity Level must be 1 (Unlimited) for equivalent handling

The identified substitute parts meet these criteria with the following considerations:

DC1C-A1RB (ZF Electronics): Meets SPDT circuit and On-Mom function requirements. Current rating is 5A AC and 1A DC. Voltage rating is 125V AC and 48V DC. This part is suitable for applications operating at or below 125V AC. Chassis mount with solder lug termination. Operating temperature -40°C to 120°C. RoHS3 Compliant.

MMGGD1L0C (C&K): Meets SPDT circuit and On-Mom function requirements. Current rating is 7A AC, exceeding the 5A requirement. Voltage rating is 250V AC, matching the primary AC specification. Chassis mount with solder turret termination (identical to main part). Operating temperature -55°C to 135°C, encompassing the main part range. ROHS3 Compliant.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (111SM1-T2): The original Honeywell 111SM1-T2 remains the baseline specification. Active product status with RoHS Compliance and established mechanical life rating of 10,000,000 cycles provide proven reliability for high-cycle applications.

Substitute Selection - MMGGD1L0C (C&K): The MMGGD1L0C is the preferred substitute for applications requiring 250V AC operation. This part matches the primary voltage specification, exceeds current requirements (7A AC vs. 5A), maintains identical solder turret termination, and extends the operating temperature range to 135°C. ROHS3 Compliant status meets current regulatory requirements. The straight lever actuator provides mechanical form-factor compatibility. This substitute is suitable for direct replacement in 250V AC applications.

Conditional Substitute - DC1C-A1RB (ZF Electronics): The DC1C-A1RB is suitable only for applications operating at 125V AC or lower. The reduced AC voltage rating (125V vs. 250V) and DC current rating (1A vs. 5A) limit its application scope. The roller actuator and solder lug termination represent mechanical differences requiring circuit board layout verification. IP67 ingress protection provides additional environmental sealing not present in the main part. ROHS3 Compliant status is current. This substitute is applicable only when voltage and current requirements are confirmed below the stated limits.

Compliance Basis: All three parts carry current RoHS compliance certifications (RoHS Compliant or ROHS3 Compliant) and MSL Level 1 ratings, meeting standard handling and environmental requirements for industrial switching applications.

Frequently Asked Questions (FAQ)

Q: Can the DC1C-A1RB replace the 111SM1-T2 in all applications?

A: No. The DC1C-A1RB has a reduced AC voltage rating of 125V compared to the 111SM1-T2 specification of 250V AC. This part is suitable only for applications operating at 125V AC or lower. Additionally, the DC current rating is 1A versus 5A on the main part, limiting DC applications. Verify your circuit voltage and current requirements before substitution.

Q: What are the key differences between the MMGGD1L0C and the 111SM1-T2?

A: The MMGGD1L0C matches the 111SM1-T2 in AC voltage rating (250V) and exceeds the current rating (7A AC vs. 5A). Both use solder turret termination and straight lever actuators. The MMGGD1L0C extends the upper operating temperature to 135°C. The main difference is the operating position (0.330" vs. 0.350"), which may affect mechanical clearance in confined spaces. Verify mounting geometry compatibility in your application.

Q: Are all three parts RoHS compliant?

A: Yes. The 111SM1-T2 is RoHS Compliant. The DC1C-A1RB and MMGGD1L0C are both ROHS3 Compliant, which represents the current regulatory standard. All three parts meet RoHS requirements for hazardous substance restrictions.

Q: What is the difference between solder turret and solder lug termination?

A: Solder turret termination (used on 111SM1-T2 and MMGGD1L0C) features a cylindrical post for through-hole soldering. Solder lug termination (used on DC1C-A1RB) features a flat tab for surface soldering. These termination styles require different circuit board pad designs. Verify your PCB layout compatibility before selecting a substitute with different termination style.

Q: Can I use the MMGGD1L0C in a 30V DC application?

A: The MMGGD1L0C does not specify a DC voltage rating in the provided data. The 111SM1-T2 is rated for 30V DC. If your application requires DC operation, confirm DC voltage and current specifications with the component manufacturer before substitution.

Q: What is the mechanical life difference between these parts?

A: The 111SM1-T2 specifies 10,000,000 mechanical cycles. The DC1C-A1RB specifies 1,000,000 cycles. The MMGGD1L0C does not specify mechanical life in the provided data. For high-cycle applications exceeding 1,000,000 cycles, the 111SM1-T2 is the specified choice.

Q: Does the DC1C-A1RB IP67 rating provide an advantage?

A: The DC1C-A1RB includes IP67 ingress protection (dust tight, waterproof), while the 111SM1-T2 does not specify ingress protection. If your application requires sealed operation in wet or dusty environments, the DC1C-A1RB provides this additional environmental protection. However, this advantage applies only if voltage and current requirements are within the DC1C-A1RB specifications.