MSS42 Equivalent & Substitute Parts Engineering Reference

Part Overview

The MSS42, manufactured by APEM Inc., is a 4PDT slide switch designed for through hole mounting, rated at 300mA 125V AC and 30V DC with an On-On switch function. This product is classified as obsolete, prompting the requirement for direct alternative or substitute part numbers to maintain design compatibility and support ongoing production or repair. Alternative parts must strictly conform to the defined electrical, mechanical, and regulatory parameters of the MSS42 to ensure functional equivalence and regulatory compliance.

Substiute Parts

MSS42

APEM Inc.In Stock: 988MSS42 Datasheet

Current PartRFQ

1825264-1

TE Connectivity ALCOSWITCH SwitchesIn Stock: 18571825264-1 Datasheet

DirectRFQ

1825266-1

TE Connectivity ALCOSWITCH SwitchesIn Stock: 11671825266-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part selection for the MSS42 is determined strictly based on matching the following key electrical and mechanical parameters:

• Circuit configuration: 4PDT
• Switch function: On-On
• Current and voltage ratings: 300mA (AC/DC), 125 V AC, and 30 V DC
• Actuator type and length
• Contact finish: Silver
• Mounting/termination: Through Hole, PC Pin
• Features: Epoxy Sealed Terminals
• RoHS compliance and REACH status
• Mechanical and electrical life cycles where specified

Only part numbers explicitly matching these defined fields have been included below.

Parameter Comparison

Engineering Selection Recommendations

The MSS42 is designated as obsolete, while the substitute parts 1825264-1 and 1825266-1 from TE Connectivity ALCOSWITCH Switches are classified as active. All compared options are RoHS3 compliant and share EAR99 export control classification. Both the main and substitute options are listed as REACH unaffected, with the exception of 1825266-1, which is vendor undefined for REACH. Selection should prioritize substitutes with active product status and defined compliance.

Frequently Asked Questions (FAQ)

Q1: What determines a valid substitute for the MSS42 slide switch?
A1: Substitute parts must match the MSS42’s electrical ratings, circuit function (4PDT, On-On), mounting type, termination, actuator type, and compliance requirements.

Q2: Are 1825264-1 and 1825266-1 fully compatible replacements for MSS42?
A2: Both provide matching circuit, switch function, mounting, and compliance profiles, with differences such as actuator length and contact timing specified.

Q3: Does the packaging type or inventory level affect substitute selection?
A3: Substitute selection, based on the provided data, is not determined by packaging style or inventory levels.

Q4: Does the actuator length impact interchangeability?
A4: Actuator length is a mechanical parameter; both 8.00mm (matching MSS42) and 12.00mm options are documented. Selection should be based on the required dimensional fit.

Q5: Are there any differences in lifecycle or reliability between the substitutes and MSS42?
A5: Substitute parts list a higher electrical and mechanical life (15,000 cycles) compared to MSS42 (10,000 cycles), as provided.

Q6: Are environmental compliance and export controls equivalent among all options?
A6: All parts are RoHS3 compliant and have the same ECCN code. REACH status is unaffected for MSS42 and 1825264-1; 1825266-1 is vendor undefined for REACH.