M2018SS1G03 Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The M2018SS1G03 is a panel-mount toggle switch manufactured by NKK Switches with SPDT (Single Pole Double Throw) circuit configuration and Mom-Off-Mom switching function. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The switch is rated for 0.4VA at 28V AC/DC with a circular 6.50mm panel cutout and 1/4-40 bushing thread.

Substiute Parts

M2018SS1G03

NKK SwitchesIn Stock: 1569M2018SS1G03 Datasheet

Current PartRFQ

MN18SS1G03

NKK SwitchesIn Stock: 749MN18SS1G03 Datasheet

MFR RecommendedRFQ

100SP4T6B11M2QE

E-SwitchIn Stock: 976100SP4T6B11M2QE Datasheet

SimilarRFQ

100SP4T6B11M2QEH

E-SwitchIn Stock: 1378100SP4T6B11M2QEH Datasheet

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7105P3Y1CBE

C&KIn Stock: 8927105P3Y1CBE Datasheet

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A127L21HCQ

ElectroswitchIn Stock: 957A127L21HCQ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M2018SS1G03 is determined by the following critical parameters:

• Circuit configuration must be SPDT
• Switch function must be Mom-Off-Mom
• Mounting type must be Panel Mount
• Termination style must be PC Pin
• Bushing thread must be 1/4-40
• Voltage rating must support minimum 28V DC operation
• Current rating must support minimum 0.4VA operation
• Operating temperature range must encompass -30°C to 85°C
• RoHS compliance status must be maintained

Substitute parts are grouped into two categories: manufacturer-recommended equivalents and similar alternatives from other manufacturers that meet the above electrical and mechanical criteria.

Parameter Comparison

Engineering Selection Recommendations

MN18SS1G03 (NKK Switches) is the manufacturer-recommended equivalent and represents the primary substitution path. This part maintains NKK Switches manufacturing continuity, carries Active product status, and holds ROHS3 compliance identical to the original M2018SS1G03.

100SP4T6B11M2QE and 100SP4T6B11M2QEH (E-Switch) are functionally compatible alternatives with enhanced current ratings (5A versus 0.4VA) and higher AC voltage capability (120V versus 28V). Both parts maintain the required 28V DC rating, SPDT circuit, Mom-Off-Mom function, and 1/4-40 bushing thread. Panel cutout diameter is 6.35mm (versus 6.50mm original), requiring minor mechanical adjustment. Both carry ROHS3 compliance and Active product status.

7105P3Y1CBE (C&K) meets core electrical and mechanical substitution criteria with matching 0.4VA current rating and SPDT Mom-Off-Mom configuration. DC voltage rating is 20V, which is below the 28V requirement of the original part. This part carries ROHS3 compliance and Active product status but has REACH Affected status.

A127L21HCQ (Electroswitch) provides the highest current rating (6A) and electrical life (60,000 cycles) among alternatives. It maintains SPDT Mom-Off-Mom function, 1/4-40 bushing thread, and 28V DC rating. Panel cutout dimensions are not specified. RoHS compliance is stated as RoHS Compliant (not ROHS3 specific). REACH status is Vendor Undefined.

Frequently Asked Questions (FAQ)

Q: Can MN18SS1G03 be used as a direct replacement for M2018SS1G03?

A: Yes. MN18SS1G03 is the manufacturer-recommended equivalent from NKK Switches. It maintains identical circuit configuration (SPDT), switch function (Mom-Off-Mom), mounting type (Panel Mount), termination style (PC Pin), bushing thread (1/4-40), and RoHS compliance status. Detailed specifications for MN18SS1G03 are not fully provided in the reference data, but manufacturer recommendation establishes functional equivalence.

Q: What are the mechanical compatibility considerations when substituting E-Switch parts?

A: E-Switch models 100SP4T6B11M2QE and 100SP4T6B11M2QEH feature a panel cutout diameter of 6.35mm compared to the original 6.50mm. This 0.15mm difference requires verification of panel hole dimensions. Actuator length is 12.30mm versus the original 10.50mm, which may affect clearance in confined spaces. Both parts use identical 1/4-40 bushing thread and PC Pin termination.

Q: Are there voltage limitations with substitute parts?

A: 7105P3Y1CBE (C&K) has a maximum DC voltage rating of 20V, which is below the original 28V DC specification. This part is not suitable for applications requiring full 28V operation. All other substitute parts (MN18SS1G03, E-Switch models, and A127L21HCQ) support minimum 28V DC operation and are electrically compatible.

Q: How do electrical life ratings compare?

A: The original M2018SS1G03 is rated for 50,000 electrical cycles. E-Switch and C&K alternatives are rated for 40,000 cycles. A127L21HCQ provides the highest rating at 60,000 cycles. Selection should consider application duty cycle requirements.

Q: What compliance certifications should be verified?

A: All substitute parts maintain RoHS compliance. MN18SS1G03, E-Switch models, and 7105P3Y1CBE carry ROHS3 Compliant status matching the original. A127L21HCQ is RoHS Compliant (specific revision not specified). REACH status varies: most parts are REACH Unaffected or Not Applicable, except 7105P3Y1CBE (REACH Affected) and A127L21HCQ (Vendor Undefined). Verify compliance requirements for your specific application and region.