M2018ES1W01 Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The M2018ES1W01 is a panel-mount toggle switch manufactured by NKK Switches with SPDT (Single Pole Double Throw) circuit configuration. This component is rated for 6A at 125V AC and 3A at 30V DC with momentary-off-momentary (Mom-Off-Mom) switching function. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Key Parameters

Parameter	M2018ES1W01
Manufacturer	NKK Switches
Circuit Configuration	SPDT
Switch Function	Mom-Off-Mom
Current Rating (AC)	6A
Current Rating (DC)	3A
Voltage Rating (AC)	125V
Voltage Rating (DC)	30V
Mounting Type	Panel Mount
Panel Cutout Diameter	6.50mm
Bushing Thread	1/4-40
Termination Style	Solder Lug
Operating Temperature Range	-30°C to 85°C
Electrical Life	25,000 Cycles
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the M2018ES1W01 is determined by the following critical parameters:

Primary Compatibility Criteria:

Circuit configuration (SPDT required)
Switch function (Mom-Off-Mom required)
Mounting type (Panel Mount required)
Termination style (Solder Lug required)
Panel cutout dimensions (6.35mm or 6.50mm circular acceptable)
Bushing thread (1/4-40 preferred)

Electrical Performance Criteria:

Current rating must meet or exceed 6A AC / 3A DC
Voltage rating must meet or exceed 125V AC / 30V DC
Operating temperature range must encompass -30°C to 85°C

Compliance Criteria:

RoHS3 compliance required
ECCN EAR99 classification

Substitute parts are grouped into two categories based on electrical performance alignment:

Category A - Full Electrical Equivalents: Parts meeting or exceeding all electrical ratings of the M2018ES1W01 (6A AC minimum, 125V AC minimum).

Category B - Reduced Electrical Rating Substitutes: Parts with lower electrical ratings suitable only for applications operating below their specified limits.

Parameter Comparison

Part Number	Manufacturer	Circuit	Current (AC)	Current (DC)	Voltage (AC)	Voltage (DC)	Panel Cutout	Bushing Thread	Temp Range	Electrical Life	Product Status	RoHS
M2018ES1W01	NKK Switches	SPDT	6A	3A	125V	30V	6.50mm	1/4-40	-30 to 85°C	25,000	Obsolete	ROHS3
MN18ES1W01	NKK Switches	SPDT	—	—	—	—	—	—	—	—	Active	ROHS3
5637AB9	APEM Inc.	SPDT	6A	4A	125V	30V	6.50mm	—	-40 to 85°C	50,000	Active	ROHS3
7105L2PHZBE	C&K	SPDT	0.4VA	0.4VA	20V	20V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3
7105L41H3ZQE2	C&K	SPDT	5A	5A	120V	28V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3
7105L41H3ZQE22	C&K	SPDT	5A	5A	120V	28V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3
7105P3Y4ZGE	C&K	SPDT	5A	5A	120V	28V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3
7105P3Y4ZQE	C&K	SPDT	5A	5A	120V	28V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3
7105P3YZQE	C&K	SPDT	5A	5A	120V	28V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3
7105SY4ZBE	C&K	SPDT	0.4VA	0.4VA	20V	20V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3
7105SY4ZQE	C&K	SPDT	5A	5A	120V	28V	6.35mm	1/4-40	-30 to 85°C	40,000	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation - Full Electrical Equivalent:

The 5637AB9 (APEM Inc.) is the preferred substitute for direct replacement applications. This part maintains electrical parity with the M2018ES1W01 at 6A AC / 4A DC and 125V AC / 30V DC ratings. The 5637AB9 offers extended operating temperature range (-40°C to 85°C) and doubled electrical life (50,000 cycles versus 25,000 cycles). Both parts are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability.

Secondary Recommendations - Reduced Electrical Rating Substitutes:

The C&K 7105 series parts (7105L41H3ZQE2, 7105L41H3ZQE22, 7105P3Y4ZGE, 7105P3Y4ZQE, 7105SY4ZQE) are suitable substitutes for applications where the circuit operates at or below 5A AC and 120V AC. These parts share identical mechanical mounting characteristics (6.35mm panel cutout, 1/4-40 bushing thread, solder lug termination) and maintain ROHS3 compliance with active product status. Electrical life ratings of 40,000 cycles exceed the original specification.

Limited Application Substitutes:

The C&K 7105L2PHZBE and 7105SY4ZBE are restricted to low-power applications operating at 0.4VA maximum and 20V maximum. These parts are suitable only for signal-level switching applications and are not appropriate for general-purpose replacement.

NKK Switches Alternative:

The MN18ES1W01 (NKK Switches) represents the manufacturer's active-status equivalent. Detailed electrical specifications are not provided in available documentation; verification with the manufacturer is required before selection for critical applications.

Frequently Asked Questions (FAQ)

Q: Can the 7105 series parts directly replace the M2018ES1W01 in all applications?

A: The 7105 series parts are mechanically compatible but carry reduced electrical ratings (5A AC / 120V AC versus 6A AC / 125V AC). Direct replacement is appropriate only for circuits operating within the 7105 series electrical limits. Applications requiring the full 6A AC / 125V AC rating must use the 5637AB9 or MN18ES1W01.

Q: What is the difference between the various C&K 7105 part numbers?

A: The 7105 series variants differ in actuator type and length. The 7105L series features flat anti-rotation actuators (13.49mm length), the 7105P3 series features flat anti-rotation actuators (11.43mm length), and the 7105SY series features standard round actuators (10.67mm length). All variants maintain identical electrical ratings and mechanical mounting compatibility.

Q: Is panel cutout dimension compatibility critical?

A: Panel cutout dimensions are critical for mechanical fit. The M2018ES1W01 specifies 6.50mm circular cutout, while most C&K substitutes specify 6.35mm. Both dimensions are acceptable for standard panel-mount applications with minor tolerance considerations. The 5637AB9 maintains the 6.50mm specification for direct fit compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original M2018ES1W01 specification. This ensures regulatory compliance for applications subject to RoHS requirements.

Q: What is the significance of the M2018ES1W01 obsolete status?

A: Obsolete status indicates the part is no longer manufactured by NKK Switches. The MN18ES1W01 represents the active-status successor from the same manufacturer. For new designs or long-term supply assurance, the 5637AB9 or 7105 series alternatives are recommended due to their confirmed active product status and established supply availability.

Q: Can low-power C&K parts (7105L2PHZBE, 7105SY4ZBE) be used in place of higher-rated parts?

A: No. These parts are rated for 0.4VA at 20V maximum and are suitable only for signal-level switching. They cannot safely carry the 6A AC / 125V AC load of the original specification and must not be selected for general-purpose replacement applications.

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