SCHURTER 3-102-646 MSM Mechanical Metal Line Switch - Equivalent & Substitute Parts

Part Overview

The SCHURTER 3-102-646 is an anti-vandal illuminated pushbutton switch with SPDT circuit configuration, designed for panel-mount front installation. This component features a ceramic actuator with white LED illumination and is rated for 100mA DC at 30V. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications where continued supply cannot be guaranteed.

Substiute Parts

3-102-646

SCHURTER Inc.In Stock: 9983-102-646 Datasheet

Current PartRFQ

3-145-386

SCHURTER Inc.In Stock: 11893-145-386 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCHURTER 3-102-646 is determined by the following critical parameters:

• Circuit configuration (SPDT requirement)
• Anti-vandal and illuminated switch type
• Panel-mount front installation capability
• Current and voltage ratings (100mA DC, 30V DC minimum)
• LED illumination with 24VDC nominal voltage
• Round flush button actuator geometry
• Quick Connect 0.110" (2.8mm) termination compatibility
• Circular 16.10mm panel cutout compatibility
• Operating temperature range (-25°C to 85°C)
• IP40 ingress protection rating

The SCHURTER 3-145-386 qualifies as a manufacturer-recommended substitute based on matching the core functional requirements of the MSM mechanical metal line switch platform within the SCHURTER product family.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 3-145-386 is designated as the manufacturer-recommended substitute for the obsolete 3-102-646. Selection of the 3-145-386 is supported by:

• Active product status, ensuring continued availability and supply chain reliability
• Manufacturer recommendation, indicating functional and mechanical compatibility within the MSM switch platform
• Higher current inventory (1164 units), providing supply security for production and maintenance applications
• SCHURTER Inc. as the original equipment manufacturer, maintaining design consistency and quality standards

For applications currently using the 3-102-646, transition to the 3-145-386 is the manufacturer-supported path forward. Verification of specific electrical and mechanical parameters for the 3-145-386 against application requirements is necessary prior to implementation.

Frequently Asked Questions (FAQ)

Q: Why is the 3-102-646 being replaced? A: The 3-102-646 has reached obsolete status. The manufacturer recommends the 3-145-386 as the active equivalent within the MSM mechanical metal line switch product family.

Q: Are the 3-102-646 and 3-145-386 mechanically interchangeable? A: Both components are part of the SCHURTER MSM switch platform. Mechanical compatibility is supported by the manufacturer recommendation. Physical dimensions, panel cutout requirements, and termination style must be verified against your specific installation.

Q: What is the difference between the MSM CS series and MSM series? A: The 3-102-646 belongs to the MSM CS series, while the 3-145-386 is part of the broader MSM series. Both are SCHURTER mechanical metal line switches. The manufacturer recommendation indicates functional equivalence for substitution purposes.

Q: Can I use the 3-145-386 in existing designs using the 3-102-646? A: The 3-145-386 is the manufacturer-recommended substitute. Electrical and mechanical parameters must be confirmed to match your application requirements before implementation.

Q: What inventory considerations should I account for? A: The 3-102-646 has 927 units in stock, while the 3-145-386 has 1164 units available. For long-term supply planning, the active status of the 3-145-386 provides greater assurance of continued availability compared to the obsolete 3-102-646.