M2018SS1W01-BB Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The M2018SS1W01-BB is a panel-mount toggle switch manufactured by NKK Switches, configured as a Single Pole Double Throw (SPDT) momentary-off-momentary switch. This component is rated for 6A at 125V AC and 3A at 30V DC operation. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and new designs requiring compatible switching functionality.

Substiute Parts

M2018SS1W01-BB

NKK SwitchesIn Stock: 918M2018SS1W01-BB Datasheet

Current PartRFQ

MN18SS1W01-BB

NKK SwitchesIn Stock: 1134MN18SS1W01-BB Datasheet

MFR RecommendedRFQ

A127S1HZQ

ElectroswitchIn Stock: 1182A127S1HZQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M2018SS1W01-BB is determined by the following critical parameters:

• Circuit Configuration: Must be SPDT to maintain electrical functionality
• Switch Function: Must be Mom-Off-Mom to preserve operational behavior
• Current Rating: Must support minimum 6A at 125V AC; DC ratings of 3A at 30V or higher are acceptable
• Voltage Rating: Must support 125V AC minimum; DC voltage of 28V or higher is acceptable
• Mounting Type: Must be Panel Mount with 1/4-40 bushing thread for mechanical compatibility
• Termination Style: Must be Solder Lug for circuit board integration
• Actuator Type: Standard round actuator acceptable; length variations within mechanical envelope are permissible

The two identified substitute parts meet these core criteria while offering improved product status and availability.

Parameter Comparison

Engineering Selection Recommendations

MN18SS1W01-BB is the manufacturer-recommended substitute from NKK Switches. As an active product from the original manufacturer, this part maintains design continuity and supply chain reliability. Selection of this part is appropriate for applications requiring direct manufacturer support and long-term availability assurance.

A127S1HZQ is a functionally equivalent alternative from Electroswitch. This part meets all critical electrical parameters and offers enhanced specifications including higher DC current rating (6A versus 3A), extended operating temperature range (-30°C to 90°C versus -30°C to 85°C), and increased electrical life (60,000 cycles versus 25,000 cycles). Both parts are RoHS compliant and carry equivalent trade classifications. The A127S1HZQ is suitable for applications where extended component life and broader operational margins are beneficial.

Both substitute parts are active products with current inventory availability, addressing the obsolescence status of the M2018SS1W01-BB.

Frequently Asked Questions (FAQ)

Q: Can the A127S1HZQ be used as a direct replacement for the M2018SS1W01-BB?

A: Yes. Both parts share identical SPDT circuit configuration, Mom-Off-Mom function, 6A AC rating at 125V, 1/4-40 bushing thread, and solder lug termination. The A127S1HZQ meets or exceeds all electrical specifications of the M2018SS1W01-BB. The 3.09mm difference in actuator length (10.41mm versus 14.60mm) must be evaluated against mechanical envelope constraints in the specific application.

Q: What is the difference between MN18SS1W01-BB and A127S1HZQ?

A: MN18SS1W01-BB is the NKK Switches active product line equivalent, maintaining manufacturer continuity. A127S1HZQ is manufactured by Electroswitch and offers enhanced electrical life (60,000 versus 25,000 cycles) and higher DC current rating (6A versus 3A). Both meet the core functional requirements of the obsolete M2018SS1W01-BB.

Q: Are there mechanical compatibility concerns when substituting these parts?

A: Both substitute parts use identical 1/4-40 bushing threads and 6.50mm panel cutout dimensions, ensuring mechanical fit. The A127S1HZQ has a shorter actuator length (10.41mm versus 14.60mm), which may affect clearance in confined spaces or require evaluation of operator access.

Q: Do all three parts have equivalent compliance certifications?

A: All three parts carry ECCN EAR99 and HTSUS 8536.50.9065 classifications. The M2018SS1W01-BB is ROHS3 compliant; both substitutes are RoHS compliant. All parts meet regulatory requirements for their respective product statuses.

Q: Which substitute part should be selected for new designs?

A: Selection depends on application requirements. MN18SS1W01-BB is appropriate for designs requiring direct NKK Switches support and supply chain continuity. A127S1HZQ is appropriate for applications benefiting from extended electrical life and enhanced DC current capability.