M2018ES1W03 Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The M2018ES1W03 is a panel-mount toggle switch manufactured by NKK Switches, configured as a Single Pole Double Throw (SPDT) momentary-off-momentary (Mom-Off-Mom) switch. The part is rated for 6A at 125V AC and 3A at 30V DC with a flatted brass actuator and epoxy sealed terminals. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations where functional compatibility is required.

Substiute Parts

M2018ES1W03

NKK SwitchesIn Stock: 950M2018ES1W03 Datasheet

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100SP4T6B11M2QE

E-SwitchIn Stock: 976100SP4T6B11M2QE Datasheet

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100SP4T6B11M2QEH

E-SwitchIn Stock: 1378100SP4T6B11M2QEH Datasheet

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7105P3Y1CBE

C&KIn Stock: 8927105P3Y1CBE Datasheet

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7105P3Y1CQE

C&KIn Stock: 7677105P3Y1CQE Datasheet

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7105P3Y1CQI

C&KIn Stock: 12247105P3Y1CQI Datasheet

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7105P3Y4CQE

C&KIn Stock: 11467105P3Y4CQE Datasheet

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7105P3YCQE

C&KIn Stock: 13197105P3YCQE Datasheet

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A127L21HCQ

ElectroswitchIn Stock: 957A127L21HCQ Datasheet

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U15P3Y1CGE

C&KIn Stock: 929U15P3Y1CGE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M2018ES1W03 is determined by the following critical parameters:

Primary Compatibility Criteria:

• 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
• Operating temperature range must encompass -30°C to 85°C

Electrical Performance Criteria:

• AC voltage rating must be ≥125V
• AC current rating must be ≥6A
• DC voltage rating must be ≥30V
• DC current rating must be ≥3A

Mechanical Compatibility Criteria:

• Panel cutout diameter must be compatible (6.35mm or 6.50mm acceptable)
• Actuator length variation within ±1.0mm is acceptable for Mom-Off-Mom applications
• Actuator material must be brass with chrome plating

Regulatory Compliance:

• RoHS3 compliance required
• ECCN classification must be EAR99

Substitute parts are grouped based on their ability to meet or exceed these parameters while maintaining functional equivalence in panel-mount SPDT momentary switch applications.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Electrical Equivalents (Recommended for Replacement):

The A127L21HCQ (Electroswitch) provides the closest electrical match with identical 6A AC and 125V AC ratings. This part maintains full compatibility with the original M2018ES1W03 electrical specifications and is currently in active production status with RoHS compliance. The extended operating temperature range (-30°C to 90°C) and superior electrical life (60,000 cycles) provide enhanced reliability margins.

Tier 2 - Functional Equivalents (Acceptable for Most Applications):

The E-Switch 100SP4T6B11M2QE and 100SP4T6B11M2QEH, along with C&K parts 7105P3Y1CQE, 7105P3Y1CQI, 7105P3Y4CQE, 7105P3YCQE, and U15P3Y1CGE all meet the core functional requirements with 5A AC current rating at 120V AC. These parts are suitable for applications where the load current does not exceed 5A AC. All substitute parts in this tier are in active production with ROHS3 compliance and provide extended electrical life (40,000 cycles).

Tier 3 - Limited Compatibility:

The 7105P3Y1CBE (C&K) is rated for only 0.4VA at 20V and does not meet the electrical requirements of the M2018ES1W03. This part is not suitable as a substitute for standard applications.

Compliance Considerations:

All recommended substitute parts maintain ROHS3 compliance and EAR99 ECCN classification, ensuring regulatory alignment with the original component. The A127L21HCQ carries RoHS compliance (not specifically ROHS3) and should be evaluated against specific procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can the 100SP4T6B11M2QE replace the M2018ES1W03 in a 6A application?

A: The 100SP4T6B11M2QE is rated for 5A AC maximum. Applications requiring 6A AC operation must use the A127L21HCQ, which maintains the full 6A AC rating of the original M2018ES1W03.

Q: What is the difference between the E-Switch 100SP4T6B11M2QE and 100SP4T6B11M2QEH?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: 100SP4T6B11M2QE is supplied in bulk packaging, while 100SP4T6B11M2QEH is supplied in bulk packaging with identical specifications. Consult procurement requirements for packaging compatibility.

Q: Are the C&K 7105P3 series parts interchangeable with each other?

A: The 7105P3Y1CQE, 7105P3Y1CQI, 7105P3Y4CQE, and 7105P3YCQE are electrically and mechanically equivalent. The 7105P3Y1CBE operates at significantly lower voltage and current ratings (0.4VA at 20V) and is not interchangeable with the other 7105P3 variants or the M2018ES1W03.

Q: Does the panel cutout diameter difference between 6.35mm and 6.50mm affect installation?

A: The 0.15mm difference is within standard mechanical tolerance for panel-mount switch installations. Both cutout diameters are compatible with the 1/4-40 bushing thread specification. Verify panel hole dimensions in the specific application to confirm fit.

Q: What is the significance of the actuator length variation among substitute parts?

A: Actuator length variations (11.40mm to 13.97mm) affect the physical profile and operator feel. For Mom-Off-Mom applications, variations within approximately 1.0mm are functionally acceptable. The A127L21HCQ with 13.97mm actuator length provides a longer engagement profile, which may be beneficial in applications requiring positive tactile feedback.

Q: Why does the A127L21HCQ show "Not Specified" for panel cutout dimensions?

A: The A127L21HCQ panel cutout dimensions were not provided in the component data. Consult the Electroswitch technical documentation or contact the manufacturer to confirm mechanical compatibility with existing panel designs before implementation.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts are ROHS3 compliant. The A127L21HCQ is listed as RoHS Compliant without specific ROHS3 designation. Verify compliance status against specific procurement or regulatory requirements for your application.

Q: What is the advantage of the A127L21HCQ's 60,000-cycle electrical life compared to the M2018ES1W03's 25,000 cycles?

A: The extended electrical life rating indicates longer component durability under repeated switching operations. The A127L21HCQ provides 2.4 times the cycle rating, resulting in extended service life and reduced maintenance frequency in high-cycle applications.