MS12ASG30 Equivalent & Substitute Parts

Part Overview

The MS12ASG30 is a slide switch manufactured by NKK Switches, classified as SPDT (Single Pole Double Throw) with a current rating of 0.4VA at 28V. This component features through-hole, right-angle mounting with PC pin termination and epoxy sealed terminals. The product is currently obsolete, making identification of equivalent and substitute parts essential for ongoing maintenance, repair, and legacy system support. Substitute parts must maintain functional compatibility across circuit topology, electrical ratings, and mechanical form factor.

Substiute Parts

MS12ASG30

NKK SwitchesIn Stock: 1843MS12ASG30 Datasheet

Current PartRFQ

MSN12ASG30

NKK SwitchesIn Stock: 1310MSN12ASG30 Datasheet

MFR RecommendedRFQ

4M1-SSP1-S1/2-M6RE

Carling TechnologiesIn Stock: 9574M1-SSP1-S1/2-M6RE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MS12ASG30 are identified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Circuit configuration (SPDT topology required)
• Switch function (On-On operation)
• Current rating (0.4VA AC/DC minimum)
• Voltage rating (28V AC/DC or higher)
• Actuator length (5.10mm standard)
• Mounting type (Through Hole, Right Angle)
• Termination style (PC Pin)
• Contact finish (Gold plated)
• Operating temperature range (-30°C to 85°C or wider)

Substitute Classification:

MFR Recommended: MSN12ASG30 (NKK Switches) — Direct manufacturer equivalent with identical electrical and mechanical specifications, active product status.

Similar: 4M1-SSP1-S1/2-M6RE (Carling Technologies) — Functionally compatible SPDT slide switch with matching actuator length, mounting configuration, and termination style. Voltage rating of 20V AC/DC is lower than the original 28V specification but remains within acceptable substitution parameters for applications not requiring the full 28V rating.

Parameter Comparison

Engineering Selection Recommendations

MSN12ASG30 (MFR Recommended Substitute): This part is the primary substitute option. As an active product from the original manufacturer NKK Switches, it provides the highest assurance of compatibility and performance continuity. Both parts maintain ROHS3 compliance and identical environmental specifications. Selection of this substitute eliminates obsolescence risk while preserving the original design intent.

4M1-SSP1-S1/2-M6RE (Similar Substitute): This Carling Technologies part provides functional equivalence for applications where the 20V voltage rating is sufficient. The part maintains SPDT topology, On-On switching function, matching actuator geometry, and identical mounting/termination configuration. The reduced electrical life rating (30,000 cycles versus 50,000 cycles) and lower voltage specification require evaluation against application duty cycle and voltage requirements. This substitute is suitable for legacy system replacement where voltage and cycle life demands do not exceed the specified ratings. ROHS3 compliance is maintained.

Frequently Asked Questions (FAQ)

Q: Can MSN12ASG30 be used as a direct replacement for MS12ASG30? A: Yes. MSN12ASG30 is the manufacturer-recommended equivalent with identical electrical and mechanical specifications. Both parts share the same SPDT circuit topology, 0.4VA current rating, 28V voltage rating, 5.10mm actuator length, through-hole right-angle mounting, and PC pin termination. Active product status of MSN12ASG30 eliminates obsolescence concerns.

Q: Is 4M1-SSP1-S1/2-M6RE compatible with MS12ASG30? A: Functional compatibility exists for applications where the 20V voltage rating is acceptable. Both parts maintain SPDT configuration, On-On switching, 0.4VA current rating, 5.10mm actuator length, and identical mounting/termination style. The voltage rating reduction from 28V to 20V and electrical life reduction from 50,000 to 30,000 cycles must be evaluated against specific application requirements.

Q: What are the critical parameters for substitution? A: Circuit configuration (SPDT required), switch function (On-On), current rating (0.4VA minimum), voltage rating (28V for full compatibility), actuator length (5.10mm), mounting type (through-hole right-angle), termination style (PC pin), and contact finish (gold plated). Deviations in any of these parameters may compromise circuit functionality or mechanical fit.

Q: Are all substitute parts RoHS compliant? A: Yes. MS12ASG30, MSN12ASG30, and 4M1-SSP1-S1/2-M6RE are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the difference in electrical life between the main part and the Carling Technologies substitute? A: MS12ASG30 is rated for 50,000 electrical cycles, while 4M1-SSP1-S1/2-M6RE is rated for 30,000 electrical cycles. Applications requiring frequent switching operations should account for this 40% reduction in rated cycle life when selecting the Carling Technologies substitute.