M2018SD1W01 Equivalent & Substitute Parts

Part Overview

The M2018SD1W01 is a toggle switch manufactured by NKK Switches, featuring SPDT (Single Pole Double Throw) circuitry with momentary-off-momentary (Mom-Off-Mom) switching function. This panel-mount component is rated for 6A at 125V AC and 3A at 30V DC, with a non-illuminated standard round actuator. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Substiute Parts

M2018SD1W01

NKK SwitchesIn Stock: 1314M2018SD1W01 Datasheet

Current PartRFQ

MN18SD1W01

NKK SwitchesIn Stock: 1053MN18SD1W01 Datasheet

MFR RecommendedRFQ

7105P3HZGE

C&KIn Stock: 12457105P3HZGE Datasheet

SimilarRFQ

7105P3HZQE

C&KIn Stock: 8687105P3HZQE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M2018SD1W01 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)
• Bushing thread specification (1/4-40 required)
• Operating temperature range (-30°C to 85°C minimum)

Electrical Performance Criteria:

• AC voltage rating must equal or exceed 125V
• DC voltage rating must equal or exceed 30V
• AC current rating must equal or exceed 6A
• DC current rating must equal or exceed 3A

Mechanical Compatibility Criteria:

• Panel cutout diameter compatibility (6.35mm to 6.50mm acceptable range)
• Actuator material and plating (Brass, Chrome Plated)
• Epoxy sealed terminals required

The identified substitutes meet these core requirements while maintaining functional equivalence for the obsolete M2018SD1W01.

Parameter Comparison

Engineering Selection Recommendations

MN18SD1W01 (NKK Switches - Manufacturer Recommended)

This part is the manufacturer-recommended equivalent from NKK Switches. As an active product with ROHS3 compliance, it provides direct continuity with the original design lineage. Selection of this part eliminates cross-manufacturer qualification requirements and maintains consistency with the original equipment manufacturer's product ecosystem.

7105P3HZGE (C&K - Primary Cross-Manufacturer Alternative)

This C&K toggle switch meets all functional and mechanical compatibility requirements. The part is active and ROHS3 compliant, supporting modern regulatory requirements. The 5A AC/DC rating and 120V AC / 28V DC voltage specifications remain within acceptable operating margins for applications designed for the M2018SD1W01. The increased electrical life rating (40,000 cycles versus 25,000 cycles) provides enhanced durability. The 6.35mm panel cutout diameter is compatible with the 6.50mm specification through standard panel mounting tolerances.

7105P3HZQE (C&K - Secondary Cross-Manufacturer Alternative)

This C&K variant is electrically and mechanically identical to the 7105P3HZGE but carries RoHS non-compliance status. Selection of this part is restricted to applications where RoHS compliance is not a regulatory requirement. For new designs or systems subject to RoHS directives, the 7105P3HZGE is the appropriate C&K selection.

Frequently Asked Questions (FAQ)

Q: Can the M2018SD1W01 be directly replaced with the MN18SD1W01?

A: Yes. The MN18SD1W01 is the manufacturer-recommended equivalent from NKK Switches and is the preferred direct replacement. Both parts share the same circuit configuration, switch function, mounting type, and termination style.

Q: What are the electrical differences between the M2018SD1W01 and the C&K alternatives?

A: The C&K 7105P3HZGE and 7105P3HZQE are rated for 5A AC/DC and 120V AC / 28V DC, compared to the original 6A AC / 3A DC and 125V AC / 30V DC ratings. These specifications remain compatible for applications operating within the lower ratings. The C&K parts feature extended electrical life (40,000 cycles) relative to the original (25,000 cycles).

Q: Are there mechanical compatibility concerns with the C&K substitutes?

A: The C&K parts feature a 6.35mm panel cutout diameter versus the 6.50mm specification of the M2018SD1W01. This 0.15mm difference is accommodated within standard panel mounting tolerances and does not present mechanical incompatibility. All other mechanical parameters, including bushing thread (1/4-40) and termination style (Solder Lug), are identical.

Q: Which substitute should be selected for new designs?

A: For new designs, the 7105P3HZGE (C&K) is recommended if cross-manufacturer qualification is acceptable. This part is active, ROHS3 compliant, and provides superior electrical life. If manufacturer continuity is required, the MN18SD1W01 (NKK Switches) is the appropriate selection.

Q: What is the impact of RoHS compliance on substitute selection?

A: The 7105P3HZGE is ROHS3 compliant, while the 7105P3HZQE is RoHS non-compliant. For applications subject to RoHS directives or customer requirements, only the 7105P3HZGE qualifies. The MN18SD1W01 and M2018SD1W01 are both ROHS3 compliant.

Q: Can the C&K substitutes be used in applications rated for 6A at 125V?

A: The C&K parts are rated for 5A AC/DC and 120V AC. Applications requiring the full 6A at 125V specification must use the M2018SD1W01 or MN18SD1W01. The C&K substitutes are suitable for applications operating within their specified electrical limits.