Littelfuse 59140-1-T-03-F Magnetic Reed Switch: Equivalent & Substitute Parts

Part Overview

The Littelfuse 59140-1-T-03-F is a magnetic reed switch sensor with SPST-NO (Single Pole Single Throw - Normally Open) output configuration. This component features wire leads termination and flange mount packaging, designed for magnetic actuation applications across industrial and commercial environments.

The 59140-1-T-03-F carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure continued availability, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

59140-1-T-03-F

Littelfuse Inc.In Stock: 96659140-1-T-03-F Datasheet

Current PartRFQ

59140-1-T-02-F

Littelfuse Inc.In Stock: 102559140-1-T-02-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 59140-1-T-03-F is determined by strict alignment across the following critical parameters:

• Output Configuration: SPST-NO switching topology
• Actuator Type: Magnetic actuation mechanism
• Termination Interface: Wire leads connection method
• Package Form Factor: Flange mount mechanical interface
• Actuation Distance: 8.40mm must-operate specification
• Operating Temperature Range: -40°C to 105°C environmental specification
• Series Family: 59140 product line
• Compliance Standards: ROHS3 compliance requirement

The identified substitute part maintains identical electrical and mechanical specifications across all these parameters, ensuring functional and physical compatibility within existing designs and applications.

Parameter Comparison

Engineering Selection Recommendations

The 59140-1-T-02-F is the direct substitute for the obsolete 59140-1-T-03-F. Both components share identical electrical specifications, mechanical interfaces, and environmental operating parameters. The primary distinction is product status: the 59140-1-T-02-F maintains Active status with current manufacturing support and documented availability.

Selection of the 59140-1-T-02-F provides:

• Functional equivalence across all switching and actuation specifications
• Continued compliance with ROHS3 regulatory requirements
• Maintained compatibility with existing flange mount mechanical interfaces
• Sustained performance across the specified -40°C to 105°C operating temperature envelope
• Access to active product support and supply chain continuity

Frequently Asked Questions (FAQ)

Q: Can the 59140-1-T-02-F directly replace the 59140-1-T-03-F in existing applications?

A: Yes. Both components are identical in electrical output configuration (SPST-NO), actuation mechanism (magnetic), termination method (wire leads), package form factor (flange mount), and operating specifications. Direct substitution is supported without design modification.

Q: What is the significance of the product status difference between these parts?

A: The 59140-1-T-03-F is classified as Obsolete, indicating discontinued manufacturing and limited availability. The 59140-1-T-02-F maintains Active status, ensuring ongoing production, documented supply, and manufacturer support. For new designs or ongoing production requirements, the Active part is the appropriate selection.

Q: Are there packaging differences between these substitute parts?

A: The 59140-1-T-03-F does not specify packaging detail in available documentation. The 59140-1-T-02-F is supplied in Box packaging. Both components maintain identical flange mount mechanical interfaces and wire leads termination, ensuring compatibility regardless of packaging format.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both the 59140-1-T-03-F and 59140-1-T-02-F are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity classification, and operate across the identical -40°C to 105°C temperature range. Compliance and environmental specifications are fully aligned.

Q: What is the must-operate distance specification, and is it identical between parts?

A: The must-operate distance is 8.40mm for both components. This specification defines the magnetic field distance at which the reed switch is guaranteed to close. Identical specifications ensure equivalent actuation behavior in magnetic sensing applications.