MB2011LS1G01-BC Equivalent & Substitute Parts

Part Overview

The MB2011LS1G01-BC is a pushbutton switch manufactured by NKK Switches, featuring SPDT (Single Pole Double Throw) circuit configuration with 0.4VA rating at 28V. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. The switch is designed for panel mount rear installation with solder lug termination and epoxy sealed terminals.

Substiute Parts

MB2011LS1G01-BC

NKK SwitchesIn Stock: 1215MB2011LS1G01-BC Datasheet

Current PartRFQ

1977737-2

TE Connectivity ALCOSWITCH SwitchesIn Stock: 11241977737-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MB2011LS1G01-BC is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Mom (momentary operation)
• Mounting type must be Panel Mount, Rear
• Termination style must be Solder Lug
• Voltage rating must meet or exceed 28V DC
• Current rating must accommodate 0.4VA or equivalent load

Secondary Compatibility Factors:

• Operating temperature range should encompass the application environment
• Electrical life rating of 50,000 cycles minimum
• RoHS3 compliance for regulatory alignment
• Panel cutout dimensions for mechanical fit (when specified)

The substitute part 1977737-2 (TE Connectivity ALCOSWITCH Switches) satisfies the primary criteria with SPDT circuit, On-Mom function, panel mount rear configuration, solder lug termination, and 30V DC rating. The 60mA DC current rating is within the 0.4VA envelope at rated voltage.

Parameter Comparison

Engineering Selection Recommendations

The 1977737-2 qualifies as a functional equivalent for the MB2011LS1G01-BC based on matching circuit topology, switch function, mounting configuration, and termination method. Both components maintain ROHS3 compliance and equivalent electrical life ratings.

The substitute part offers the advantage of active product status, ensuring continued availability and supply chain stability. The 30V DC rating provides a 2V margin above the original 28V specification. The 60mA DC current rating is compatible with the 0.4VA load envelope at the specified voltage.

Consideration should be given to the reduced lower operating temperature limit (-20°C versus -30°C) and the different actuator geometry (plunger versus round button). Panel cutout dimensions should be verified for mechanical compatibility, as the original specification lists a circular 6.50mm diameter cutout while the substitute part does not specify panel cutout dimensions.

Frequently Asked Questions (FAQ)

Q: Can the 1977737-2 directly replace the MB2011LS1G01-BC in existing designs?

A: The 1977737-2 is electrically compatible as a substitute, matching SPDT circuit, On-Mom function, 50,000 cycle electrical life, and solder lug termination. Physical verification of panel cutout compatibility is required, as the substitute part does not specify cutout dimensions. Actuator geometry differs (plunger versus round button), which may affect user interface feel and panel aesthetics.

Q: What is the current rating equivalence between 0.4VA and 60mA?

A: At 28V DC, 0.4VA equals approximately 14.3mA. At 30V DC, the 60mA rating of the substitute part provides substantial margin above the original specification. The substitute is rated for DC operation only, whereas the original supports both AC and DC at 28V.

Q: Are both parts RoHS compliant?

A: Yes, both the MB2011LS1G01-BC and 1977737-2 are ROHS3 compliant. Both carry MSL 1 (Unlimited) moisture sensitivity classification.

Q: What is the significance of product status difference?

A: The MB2011LS1G01-BC is obsolete, indicating discontinued manufacturing and limited remaining inventory (1158 pcs available). The 1977737-2 is active, ensuring ongoing availability and supply chain continuity for future procurement.

Q: Should operating temperature range differences affect substitution decisions?

A: The substitute part operates from -20°C to 80°C versus the original -30°C to 85°C. If the application requires operation below -20°C or above 80°C, the 1977737-2 is not suitable. Verify actual operating environment requirements before substitution.