M2018CS1G01 Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The M2018CS1G01 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 component operates at 0.4VA across 28V AC/DC ratings with a standard round actuator and solder lug termination. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where this switch type is required.

Substiute Parts

M2018CS1G01

NKK SwitchesIn Stock: 1083M2018CS1G01 Datasheet

Current PartRFQ

7105L1PH3ZQE

C&KIn Stock: 8147105L1PH3ZQE Datasheet

SimilarRFQ

7105L1PH3ZQI

C&KIn Stock: 10007105L1PH3ZQI Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the M2018CS1G01 are identified based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Circuit configuration: SPDT
• Switch function: Mom-Off-Mom
• Mounting type: Panel Mount
• Termination style: Solder Lug
• Bushing thread: 1/4-40
• Operating temperature range: -30°C to 85°C
• Actuator material: Brass, Chrome Plated

Allowable Parameter Variations:

• Current rating: Substitute parts may exceed the 0.4VA requirement, provided they meet or exceed this specification
• Voltage rating: Substitute parts must support minimum 28V DC operation
• Panel cutout diameter: Minor variations acceptable within mechanical tolerance (6.35mm to 6.50mm)
• Actuator length: Variations acceptable if panel mounting geometry permits (14.50mm to 15.75mm)
• Electrical life: Substitute parts must meet or exceed 50,000 cycles

The C&K 7105L1 series parts (7105L1PH3ZQE and 7105L1PH3ZQI) satisfy these criteria as active-status alternatives with enhanced current ratings (5A) and voltage capabilities (120V AC), while maintaining core SPDT Mom-Off-Mom functionality and identical mounting specifications.

Parameter Comparison

Engineering Selection Recommendations

7105L1PH3ZQE Selection Criteria: This substitute is recommended for applications requiring active product status with full regulatory compliance. The part maintains ROHS3 compliance and REACH affected status, providing continuity with modern supply chain requirements. Enhanced current rating (5A) and voltage capability (120V AC) provide operational margin beyond the original 0.4VA specification. Electrical life of 40,000 cycles meets the majority of low-cycle-count applications, though falls short of the original 50,000-cycle specification for high-cycle-count environments.

7105L1PH3ZQI Selection Criteria: This substitute offers identical electrical and mechanical specifications to 7105L1PH3ZQE with the exception of RoHS compliance status. Selection of this part is appropriate only for applications where RoHS non-compliance is acceptable or where legacy system compatibility requires non-compliant component sourcing. REACH affected status applies identically to both C&K alternatives.

Compliance Considerations: Applications subject to ROHS3 regulatory requirements must use 7105L1PH3ZQE. Applications with REACH-restricted substance requirements should evaluate the REACH affected status of both C&K alternatives against the original REACH unaffected status of the NKK part.

Frequently Asked Questions (FAQ)

Q: Can the C&K 7105L1 series parts directly replace the M2018CS1G01 in existing designs?

A: Functional replacement is supported for SPDT Mom-Off-Mom switching applications operating at 28V DC or lower. The identical bushing thread (1/4-40), solder lug termination, and panel mount configuration enable direct mechanical substitution. Panel cutout diameter variation (6.35mm vs. 6.50mm) is within standard mechanical tolerance. Actuator length increase (15.75mm vs. 14.50mm) requires verification that panel thickness and surrounding component geometry accommodate the additional 1.25mm extension.

Q: What is the significance of the actuator type difference (Standard Round vs. Anti-Rotation)?

A: The anti-rotation feature in the C&K parts prevents unintended rotation of the actuator during panel mounting or vibration exposure. This is a functional enhancement that does not prevent substitution. Standard round actuators lack this feature but remain mechanically compatible with identical bushing threads and panel cutout specifications.

Q: Why do the C&K substitutes have higher current and voltage ratings than the original part?

A: The 7105L1 series is designed for broader application coverage, supporting 5A at 120V AC while maintaining backward compatibility with lower-voltage 28V DC applications. Higher ratings do not affect performance in lower-power circuits; the switch will operate identically at 0.4VA as the original part.

Q: What is the impact of the 40,000-cycle electrical life versus the original 50,000 cycles?

A: The 10,000-cycle reduction represents approximately 20% lower cycle count specification. For applications with documented cycle count requirements exceeding 40,000 cycles, the C&K substitutes may not meet design specifications. For typical low-cycle-count applications (under 40,000 cycles), this difference is not operationally significant.

Q: Are there compliance implications when substituting the M2018CS1G01 with C&K parts?

A: The original M2018CS1G01 is ROHS3 compliant and REACH unaffected. The 7105L1PH3ZQE maintains ROHS3 compliance but is REACH affected. The 7105L1PH3ZQI is RoHS non-compliant and REACH affected. Applications subject to ROHS3 or REACH regulatory requirements must use 7105L1PH3ZQE exclusively. Legacy or non-regulated applications may use either C&K part based on availability and cost considerations.

Q: What panel thickness range is compatible with the 15.75mm actuator length of the C&K substitutes?

A: This specification is not provided in the component data. Panel thickness compatibility must be evaluated based on the specific application panel geometry and the 1.25mm actuator length increase relative to the original 14.50mm specification.