Littelfuse 59140-1-S-05-F Magnetic Reed Switch Equivalent & Substitute Parts

Part Overview

The Littelfuse 59140-1-S-05-F is a magnetic reed switch sensor with SPST-NO (Single Pole Single Throw - Normally Open) output configuration, designed for flange mount applications with wire lead termination. This component operates across a temperature range of -40°C to 105°C and features a magnetic actuator with a must-operate distance of 10.40mm.

The 59140-1-S-05-F is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this magnetic sensor.

Substiute Parts

59140-1-S-05-F

Littelfuse Inc.In Stock: 72759140-1-S-05-F Datasheet

Current PartRFQ

59140-1-S-02-F

Littelfuse Inc.In Stock: 262959140-1-S-02-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 59140-1-S-05-F is determined by strict equivalence across the following critical parameters:

• Functional Output: SPST-NO configuration
• Actuator Type: Magnetic activation
• Termination: Wire leads
• Physical Form Factor: Flange mount package
• Actuation Specification: Must-operate distance of 10.40mm
• Environmental Compliance: Operating temperature range -40°C to 105°C, ROHS3 compliance, MSL 1

The substitute part 59140-1-S-02-F meets all these criteria and belongs to the same Littelfuse 59140 series, ensuring functional and mechanical compatibility with the original design.

Parameter Comparison

Engineering Selection Recommendations

The 59140-1-S-02-F is the primary substitute for the obsolete 59140-1-S-05-F. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications, including SPST-NO output, magnetic actuation, wire lead termination, flange mount configuration, and operating parameters.

The key distinction is product status: the 59140-1-S-02-F maintains active production status with verified inventory availability (2566 units), whereas the 59140-1-S-05-F is obsolete. Both components maintain ROHS3 compliance and identical environmental ratings, ensuring regulatory continuity in applications requiring these certifications.

Frequently Asked Questions (FAQ)

Q: Can the 59140-1-S-02-F directly replace the 59140-1-S-05-F in existing designs?

A: Yes. Both components share identical electrical output (SPST-NO), actuation distance (10.40mm), termination style (wire leads), package form factor (flange mount), and operating temperature range (-40°C to 105°C). No design modification is required.

Q: What is the primary reason for substitution?

A: The 59140-1-S-05-F is classified as obsolete. The 59140-1-S-02-F provides functional and mechanical equivalence while maintaining active production and supply availability.

Q: Are there compliance differences between these parts?

A: No. Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Regulatory requirements are maintained across the substitution.

Q: Does packaging differ between these parts?

A: The 59140-1-S-05-F packaging information is not specified in available data. The 59140-1-S-02-F is supplied in box packaging. Both maintain identical flange mount physical form factor and wire lead termination.

Q: What inventory status should be considered for procurement?

A: The 59140-1-S-02-F has confirmed inventory of 2566 units in stock. The 59140-1-S-05-F, being obsolete, should not be specified for new procurement.