MB2011LD1G01-BC Equivalent & Substitute Parts

Part Overview

The MB2011LD1G01-BC is a pushbutton switch manufactured by NKK Switches, classified as SPDT (Single Pole Double Throw) with On-Momentary function. This component is rated for 0.4VA at 28V AC/DC and features a red round button actuator with solder lug termination for panel mount, rear installation. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and legacy system support.

Substiute Parts

MB2011LD1G01-BC

NKK SwitchesIn Stock: 1039MB2011LD1G01-BC Datasheet

Current PartRFQ

1977737-2

TE Connectivity ALCOSWITCH SwitchesIn Stock: 11241977737-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MB2011LD1G01-BC is determined by the following critical parameters:

• Circuit Configuration: SPDT topology must be maintained
• Switch Function: On-Momentary operation required
• Mounting Interface: Panel Mount, Rear installation capability
• Termination: Solder Lug connection method
• Voltage Compatibility: Rated voltage must meet or exceed 28V DC/AC requirements
• Current Capacity: Minimum 0.4VA handling capability
• Regulatory Compliance: RoHS3 compliance required

The substitute part 1977737-2 (TE Connectivity ALCOSWITCH Switches) satisfies these core substitution criteria through matching circuit topology, switch function, mounting type, termination style, and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

The 1977737-2 serves as a functional equivalent for the obsolete MB2011LD1G01-BC based on the following engineering criteria:

Matching Specifications: Both components share identical SPDT circuit topology, On-Momentary switch function, panel mount rear installation, solder lug termination, and 50,000-cycle electrical life rating.

Voltage Compatibility: The substitute part is rated for 30V DC, which exceeds the 28V requirement of the main part, ensuring adequate voltage margin for DC applications.

Current Capacity: The 1977737-2 is rated for 60mA DC. For AC/DC applications requiring 0.4VA at 28V, verification of actual circuit current draw is necessary to confirm compatibility within the 60mA specification.

Regulatory Compliance: Both components maintain ROHS3 compliance, satisfying environmental and hazardous substance restrictions.

Product Availability: The 1977737-2 maintains active product status with current inventory availability, addressing the obsolescence of the original component.

Operating Temperature Consideration: The substitute operates within -20°C to 80°C, which is narrower than the original -30°C to 85°C range. Applications requiring operation below -20°C or above 80°C require alternative evaluation.

Frequently Asked Questions (FAQ)

Q: Can the 1977737-2 directly replace the MB2011LD1G01-BC in all applications?

A: Direct replacement is possible when circuit current draw does not exceed 60mA DC and operating temperature remains within -20°C to 80°C. Applications operating outside these parameters require alternative component evaluation.

Q: What is the primary difference between these two switches?

A: The main difference is current rating specification. The MB2011LD1G01-BC is rated for 0.4VA (AC/DC), while the 1977737-2 is rated for 60mA DC. Both maintain identical circuit topology and switch function.

Q: Are both components RoHS compliant?

A: Yes, both the MB2011LD1G01-BC and 1977737-2 are ROHS3 compliant.

Q: Does the actuator type difference affect substitution?

A: Actuator type (round button vs. plunger for cap) affects physical appearance and user interface feel but does not impact electrical function or circuit compatibility. Panel cutout dimensions must be verified for mechanical fit.

Q: What is the electrical life expectancy for the substitute part?

A: The 1977737-2 is rated for 50,000 electrical cycles, matching the original MB2011LD1G01-BC specification.

Q: Is the 1977737-2 currently available?

A: Yes, the 1977737-2 maintains active product status with documented inventory availability.