MMS42R Equivalent & Substitute Parts

Part Overview

The MMS42R is a slide switch manufactured by APEM Inc., configured as a 4PDT (four-pole double-throw) through-hole component with a right-angle mounting orientation. This switch is rated for 300mA DC at 30V with a 4.00mm actuator length and 2.00mm switch travel. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

MMS42R

APEM Inc.In Stock: 801MMS42R Datasheet

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MMS42R

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1075MMS42R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMS42R is determined by the following critical parameters:

• Circuit Configuration: Must be 4PDT to maintain electrical functionality
• Switch Function: Must be On-On to preserve operational behavior
• Mounting Type: Must be through-hole, right-angle to ensure PCB compatibility
• Voltage Rating: Must be rated for 30V DC minimum
• Contact Finish: Silver finish for consistent electrical performance
• Termination Style: PC pin termination required for through-hole assembly

The MMS42R (APEM Inc.) has been identified with one equivalent substitute from the TE Connectivity ALCOSWITCH Switches MMS series. This substitute maintains the same circuit configuration, mounting orientation, and core electrical characteristics while differing in current rating and actuator dimensions.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity ALCOSWITCH Switches MMS42R is an active-status substitute for the obsolete APEM Inc. MMS42R. Both components share identical circuit configuration (4PDT), switch function (On-On), mounting type (through-hole, right-angle), voltage rating (30V DC), and contact finish (silver). Both are ROHS3 compliant.

The primary design consideration is current rating: the TE Connectivity substitute is rated for 100mA DC compared to the original 300mA DC rating. Applications requiring current handling above 100mA cannot use this substitute without circuit redesign. The TE Connectivity variant also features a 0.50mm longer actuator (4.50mm versus 4.00mm) and operates within a narrower temperature range (-20°C to 60°C versus -20°C to 70°C).

Selection should be based on actual circuit current requirements. If the application operates at or below 100mA, the TE Connectivity substitute provides an active-status alternative with equivalent electrical and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity MMS42R substitute for the APEM Inc. MMS42R in all applications?

A: Substitution is valid only for applications where circuit current does not exceed 100mA DC. The original APEM component is rated for 300mA; the TE Connectivity substitute is rated for 100mA. Verify actual circuit current requirements before substitution.

Q: Are the actuator length differences significant?

A: The TE Connectivity substitute has a 4.50mm actuator compared to the original 4.00mm. This 0.50mm difference may affect panel cutout dimensions and user interface feel. Mechanical fit must be verified in the specific application.

Q: Do both switches have identical electrical life ratings?

A: Yes. Both the APEM Inc. MMS42R and TE Connectivity MMS42R are rated for 10,000 electrical cycles, providing equivalent operational durability.

Q: What is the impact of the temperature range difference?

A: The TE Connectivity substitute operates from -20°C to 60°C, while the original operates from -20°C to 70°C. Applications requiring operation above 60°C cannot use the TE Connectivity substitute.

Q: Are both components RoHS compliant?

A: Yes. Both the APEM Inc. MMS42R and TE Connectivity MMS42R are ROHS3 compliant, meeting environmental and regulatory requirements.

Q: What is the contact timing specification for the TE Connectivity substitute?

A: The TE Connectivity MMS42R features shorting (MBB) contact timing, ensuring make-before-break operation during switching transitions.