MB2011LS1G01-CA Equivalent & Substitute Parts

Part Overview

The MB2011LS1G01-CA 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 circular 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

MB2011LS1G01-CA

NKK SwitchesIn Stock: 1184MB2011LS1G01-CA 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-CA is determined by the following critical parameters:

• Circuit Configuration: Must be SPDT to maintain identical switching logic
• Switch Function: Must be On-Momentary to preserve operational behavior
• Mounting Type: Must be Panel Mount, Rear to ensure mechanical compatibility
• Termination Style: Must be Solder Lug for direct connection compatibility
• Voltage Rating: Substitute must meet or exceed 28V DC rating
• Current Rating: Substitute must handle the application's current requirements within its rated capacity
• Regulatory Compliance: RoHS3 compliance required for modern supply chain acceptance

The part 1977737-2 (TE Connectivity ALCOSWITCH Switches) meets these core substitution criteria. Both components share identical circuit configuration (SPDT), switch function (On-Momentary), mounting type (Panel Mount, Rear), termination style (Solder Lug), and regulatory compliance (ROHS3). The substitute's 30V DC rating exceeds the original 28V requirement, and its 60mA DC rating is suitable for applications within this current envelope.

Parameter Comparison

Engineering Selection Recommendations

The 1977737-2 qualifies as a functional substitute for the MB2011LS1G01-CA based on matching circuit topology (SPDT), operational mode (On-Momentary), mounting configuration (Panel Mount, Rear), and termination method (Solder Lug). Both components maintain ROHS3 compliance and identical electrical life ratings (50,000 cycles).

Selection of the 1977737-2 is supported by its active product status, ensuring ongoing availability and supply chain continuity compared to the obsolete MB2011LS1G01-CA. The substitute's 30V DC rating provides margin above the original 28V specification.

Critical evaluation points for implementation:

• Current Rating Differential: The original part is rated 0.4VA (AC/DC) while the substitute is rated 60mA DC. Confirm that the application's actual current draw does not exceed 60mA to ensure reliable operation.
• Temperature Range Narrowing: The substitute operates from -20°C to 80°C versus the original -30°C to 85°C. Verify that the application environment falls within the substitute's operating range.
• Actuator Geometry: The original features a round button actuator while the substitute uses a plunger-type actuator. Confirm that the panel cutout dimensions and user interface requirements are compatible with the plunger design.
• Panel Cutout Dimensions: The original specifies a circular 6.50mm diameter cutout; the substitute does not provide this specification. Physical verification of mechanical fit is required before implementation.

Frequently Asked Questions (FAQ)

Q: Can the 1977737-2 directly replace the MB2011LS1G01-CA in all applications?

A: The 1977737-2 is functionally equivalent in circuit configuration, switch function, mounting type, and termination style. However, three factors require verification: (1) the application's current draw must not exceed 60mA DC, (2) the operating environment must remain within -20°C to 80°C, and (3) the panel cutout and actuator geometry must be compatible with the plunger-type design.

Q: What is the significance of the SPDT circuit configuration?

A: SPDT (Single Pole Double Throw) means the switch has one input contact that can connect to either of two output contacts. This configuration is essential for On-Momentary operation, where the switch returns to its default state when released. Both the original and substitute maintain this identical topology.

Q: Why does the current rating differ between the two parts?

A: The MB2011LS1G01-CA is rated 0.4VA (approximately 400mA at 1V), while the 1977737-2 is rated 60mA DC. This difference reflects different design specifications and intended application ranges. The substitute's lower rating requires confirmation that the actual circuit current does not exceed 60mA.

Q: Are both parts RoHS compliant?

A: Yes. Both the MB2011LS1G01-CA and 1977737-2 are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and supply.

Q: What does "Panel Mount, Rear" termination mean?

A: Panel Mount, Rear indicates that the switch is mounted from the rear side of a control panel, with solder lug terminals extending behind the panel for connection to the circuit board or wiring harness. Both parts use this identical mounting and termination configuration.

Q: Why is the MB2011LS1G01-CA listed as obsolete?

A: Obsolete status indicates that NKK Switches has discontinued production and support for this model. The 1977737-2, maintained in active production by TE Connectivity, provides continuity for applications requiring SPDT On-Momentary pushbutton switches with panel mount configuration.