111SM47-T2 Equivalent & Substitute Parts Reference

Part Overview

The 111SM47-T2 is a snap action SPDT (Single Pole Double Throw) switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 5A at 250V AC and 30V DC, featuring a straight lever actuator with solder turret termination. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing applications requiring SPDT snap action switching capability with comparable electrical and mechanical specifications.

Substiute Parts

111SM47-T2

Honeywell Sensing and Productivity SolutionsIn Stock: 907111SM47-T2 Datasheet

Current PartRFQ

MBF5B1

APEM Inc.In Stock: 900MBF5B1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 111SM47-T2 is determined by the following critical parameters that must be maintained or exceeded:

Mandatory Matching Parameters:

• Circuit configuration: SPDT
• Switch function: On-Momentary
• Actuator type: Lever, Straight
• Mounting type: Chassis Mount
• Voltage rating (AC): 250V minimum
• Mechanical life: 10,000,000 cycles minimum
• Operating force: 85gf

Allowable Variations:

• Current rating: Substitute may exceed 5A rating
• Termination style: Alternative termination methods acceptable if mechanically compatible with chassis mount
• Operating temperature range: Substitute may have narrower range if application requirements are met
• Packaging format: May differ from original

The MBF5B1 from APEM Inc. satisfies these substitution criteria with equivalent SPDT snap action functionality, matching mechanical life specifications, and compatible chassis mount configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MBF5B1 (APEM Inc.)

The MBF5B1 is the designated equivalent for the obsolete 111SM47-T2. Selection is based on the following engineering criteria:

Functional Equivalence:

• Identical SPDT circuit configuration and On-Momentary switch function
• Matching 85gf operating force and 10,000,000 cycle mechanical life
• Equivalent 250V AC voltage rating and straight lever actuator

Product Availability:

• MBF5B1 is active production status with 859 units in stock
• 111SM47-T2 is obsolete with no ongoing manufacturing

Compliance Status:

• Both parts are RoHS compliant; MBF5B1 meets ROHS3 standard
• Both classified under HTSUS 8536.50.7000 and ECCN EAR99
• MBF5B1 carries REACH Unaffected designation

Design Considerations for Implementation:

Termination style differs: 111SM47-T2 uses solder turret while MBF5B1 uses solder lug. PCB footprint and connection methodology must be verified for compatibility with existing circuit board designs.

Operating temperature range is narrower for MBF5B1 (-40°C to 85°C versus -55°C to 125°C). Applications requiring operation below -40°C or above 85°C require alternative solutions.

Mechanical travel parameters differ: MBF5B1 exhibits greater operating position (0.437" vs 0.350"), differential travel (0.047" vs 0.020"), and overtravel (0.060" vs 0.030"). Mechanical clearance and actuation geometry must be validated in the target application.

Current rating of MBF5B1 (10A AC) exceeds the 111SM47-T2 specification (5A AC/DC), providing margin for application requirements.

Frequently Asked Questions (FAQ)

Q: Can MBF5B1 directly replace 111SM47-T2 in all applications?

A: MBF5B1 is functionally equivalent for SPDT snap action switching at 250V AC and 5A current levels. However, three factors require verification: (1) Termination style differs (solder lug vs. solder turret), requiring PCB footprint compatibility assessment; (2) Operating temperature range is narrower (-40°C to 85°C vs. -55°C to 125°C); (3) Mechanical travel distances are greater, requiring clearance validation in the mechanical assembly.

Q: What is the significance of the different termination styles?

A: The 111SM47-T2 uses solder turret termination, while MBF5B1 uses solder lug termination. These are different connection methods to the PCB. Solder turret creates a vertical connection point, while solder lug provides a flat terminal for soldering. The PCB design must accommodate the MBF5B1 termination geometry. Mechanical compatibility with the chassis mount configuration must be confirmed.

Q: Why does MBF5B1 have higher current rating than 111SM47-T2?

A: MBF5B1 is rated for 10A AC, while 111SM47-T2 is rated for 5A AC/DC. The higher rating on the substitute part indicates greater current-carrying capacity. For applications requiring only 5A, the MBF5B1 operates within its specifications with design margin. This does not create incompatibility; it provides additional capability.

Q: Are there temperature limitations with MBF5B1?

A: Yes. MBF5B1 operates from -40°C to 85°C, while 111SM47-T2 operates from -55°C to 125°C. If the application requires operation below -40°C or above 85°C, MBF5B1 is not suitable. Applications within the -40°C to 85°C range are fully compatible.

Q: What do the different mechanical travel specifications mean?

A: Operating position, differential travel, and overtravel define the physical movement of the actuator. MBF5B1 has greater values in all three parameters. This means the lever travels farther and has more mechanical tolerance. The mechanical assembly must provide sufficient clearance for this greater travel distance. Verify that the switch mounting location and surrounding components do not interfere with the increased actuator movement.

Q: Is packaging format important for substitution?

A: Packaging format (tray for MBF5B1 vs. unspecified for 111SM47-T2) affects handling and storage but does not impact electrical or mechanical function. The switch itself performs identically regardless of packaging. Packaging format is relevant only for procurement, inventory management, and logistics.

Q: Are both parts RoHS compliant?

A: Yes. 111SM47-T2 is RoHS Compliant, and MBF5B1 is ROHS3 Compliant. ROHS3 represents the current RoHS standard. Both parts meet environmental compliance requirements. MBF5B1 meets the more recent standard.

Q: What should be verified before implementing MBF5B1 as a replacement?

A: (1) PCB footprint compatibility with solder lug termination; (2) Mechanical clearance for increased actuator travel; (3) Operating temperature range suitability for the application; (4) Chassis mount configuration compatibility; (5) Electrical performance validation in the target circuit at 5A and 250V AC operating conditions.