M2T18SA5G13 Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The M2T18SA5G13 is a through-hole mounted toggle switch manufactured by NKK Switches, featuring SPDT (Single Pole Double Throw) circuitry with momentary-off-momentary (Mom-Off-Mom) switching function. Rated for 0.4VA at 28V AC/DC, this component is classified as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts is necessary for ongoing system maintenance, repair, and new design implementations where this switching topology is required.

Substiute Parts

M2T18SA5G13

NKK SwitchesIn Stock: 1082M2T18SA5G13 Datasheet

Current PartRFQ

M2T18SA5G03

NKK SwitchesIn Stock: 1096M2T18SA5G03 Datasheet

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100AWSP4T1B4M2RE

E-SwitchIn Stock: 758100AWSP4T1B4M2RE Datasheet

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100AWSP4T1B4VS2RE

E-SwitchIn Stock: 991100AWSP4T1B4VS2RE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M2T18SA5G13 is determined by the following critical parameters:

Primary Matching Criteria:

• Circuit configuration: SPDT
• Switch function: Mom-Off-Mom
• Current rating: 0.4VA (AC/DC)
• Mounting type: Through Hole
• Termination style: PC Pin
• Actuator type: Standard Round
• Actuator length: 12.70mm

Voltage Consideration: The M2T18SA5G13 operates at 28V AC/DC. Substitute parts with lower voltage ratings (20V) remain functionally compatible in applications where the actual operating voltage does not exceed the substitute's rating. The substitute parts identified operate at 20V AC/DC, which is acceptable for circuits designed for 28V operation provided the actual applied voltage does not exceed 20V.

Identified Substitutes:

• M2T18SA5G03 (NKK Switches) - Same manufacturer, identical electrical and mechanical specifications
• 100AWSP4T1B4M2RE (E-Switch) - Cross-manufacturer equivalent with matching core parameters
• 100AWSP4T1B4VS2RE (E-Switch) - Cross-manufacturer equivalent with matching core parameters

Parameter Comparison

Engineering Selection Recommendations

M2T18SA5G03 (NKK Switches): This part is the direct equivalent within the NKK Switches M2 series. It maintains identical electrical and mechanical specifications to the M2T18SA5G13. However, both parts share obsolete status, limiting long-term availability. Selection of this substitute is appropriate only when maintaining existing inventory or supporting legacy systems where component continuity is prioritized.

100AWSP4T1B4M2RE and 100AWSP4T1B4VS2RE (E-Switch): Both E-Switch alternatives are active products with current manufacturing status, ensuring ongoing availability. These parts meet all core functional requirements: SPDT circuitry, Mom-Off-Mom operation, 0.4VA current rating, matching actuator geometry, and PC pin termination. The E-Switch variants provide enhanced ingress protection (IP67) compared to the original specification. Electrical life is reduced to 30,000 cycles versus the original 50,000 cycles; this difference is acceptable for applications not requiring extended cycle counts. Both E-Switch parts carry ROHS3 compliance certification. These substitutes are recommended for new designs and applications requiring active product support.

Voltage Rating Consideration: The E-Switch substitutes operate at 20V AC/DC versus the original 28V rating. These parts are suitable for applications where the actual operating voltage does not exceed 20V. For circuits requiring full 28V operation, the M2T18SA5G03 remains the only available option, though with obsolescence constraints.

Frequently Asked Questions (FAQ)

Q: Can the E-Switch 100AWSP4T1B4M2RE be used as a direct replacement for the M2T18SA5G13?

A: Yes, provided the application operating voltage does not exceed 20V AC/DC. The E-Switch part matches all critical parameters: SPDT circuit, Mom-Off-Mom function, 0.4VA rating, 12.70mm actuator length, PC pin termination, and through-hole mounting. The reduced electrical life (30,000 versus 50,000 cycles) is acceptable for most applications. The enhanced IP67 ingress protection is an additional benefit.

Q: What is the difference between 100AWSP4T1B4M2RE and 100AWSP4T1B4VS2RE?

A: Both parts are functionally identical in electrical and mechanical specifications. The difference lies in packaging designation and internal construction details not specified in the provided data. Both are suitable substitutes for the M2T18SA5G13 under identical voltage and application constraints.

Q: Why does the M2T18SA5G03 have the same specifications as the M2T18SA5G13 but different part numbers?

A: The M2T18SA5G03 and M2T18SA5G13 are variants within the same NKK Switches M2 series, differentiated by internal configuration codes (5G03 versus 5G13). Both share identical electrical ratings, mechanical dimensions, and performance characteristics. The part number suffix indicates manufacturing or internal design variations that do not affect functional equivalence.

Q: Is the reduced electrical life of the E-Switch parts a concern?

A: The E-Switch substitutes provide 30,000 electrical cycles versus 50,000 for the original. This reduction is acceptable for applications with moderate switching frequency. For high-cycle applications requiring extended operational life, the M2T18SA5G03 is preferable, though availability is limited due to obsolescence.

Q: Are there compliance differences between the original and substitute parts?

A: The E-Switch substitutes carry ROHS3 compliance certification. The original M2T18SA5G13 does not specify RoHS status in the provided data. All parts are REACH Unaffected and carry EAR99 ECCN classification. The E-Switch variants provide enhanced environmental sealing (IP67) not specified for the original part.

Q: What voltage should be applied when using the E-Switch substitutes?

A: The E-Switch 100AWSP4T1B4M2RE and 100AWSP4T1B4VS2RE are rated for 20V AC/DC maximum. Applications designed for 28V operation must be re-evaluated to ensure actual operating voltage does not exceed 20V. If the circuit requires full 28V operation, the M2T18SA5G03 is the only available substitute.