Littelfuse 59135-4-S-02-F Magnetic Reed Switch Equivalent & Substitute Parts

Part Overview

The Littelfuse 59135-4-S-02-F is a magnetic reed switch sensor with SPST-NC (Single Pole Single Throw - Normally Closed) 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 16.50mm.

The 59135-4-S-02-F is classified as obsolete. Identifying equivalent substitute parts is essential for maintaining design continuity, ensuring supply chain reliability, and supporting long-term product availability for applications requiring this specific reed switch configuration.

Substiute Parts

59135-4-S-02-F

Littelfuse Inc.In Stock: 77859135-4-S-02-F Datasheet

Current PartRFQ

59135-4-S-02-A

Littelfuse Inc.In Stock: 137759135-4-S-02-A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 59135-4-S-02-F is determined by strict equivalence across the following critical parameters:

• Output Type: SPST-NC configuration
• Actuator Material: Magnetic actuation
• Termination Style: Wire leads
• Must Operate Distance: 16.50mm
• Operating Temperature Range: -40°C to 105°C
• Package / Case: Flange mount form factor
• Series Compatibility: Littelfuse 59135 series

The substitute part 59135-4-S-02-A meets all these criteria while offering improved product status and supply availability.

Parameter Comparison

Engineering Selection Recommendations

The 59135-4-S-02-A is the direct substitute for the obsolete 59135-4-S-02-F. Both components are manufactured by Littelfuse Inc. within the same 59135 series and maintain identical electrical and mechanical specifications across all critical parameters.

The 59135-4-S-02-A offers the advantage of active product status, ensuring continued manufacturer support and supply chain availability. Both parts maintain ROHS3 compliance and identical operating characteristics, making the 59135-4-S-02-A suitable for direct replacement in applications currently using the 59135-4-S-02-F.

Frequently Asked Questions (FAQ)

Q: Can the 59135-4-S-02-A be used as a direct replacement for the 59135-4-S-02-F?

A: Yes. Both components share identical electrical specifications (SPST-NC output), mechanical configuration (flange mount with wire leads), actuation characteristics (16.50mm must-operate distance), and operating temperature range (-40°C to 105°C). The 59135-4-S-02-A is the active equivalent.

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

A: The 59135-4-S-02-F is obsolete, while the 59135-4-S-02-A maintains active product status. The 59135-4-S-02-A is supplied in box packaging. All functional and electrical parameters remain identical.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited). No compliance differences exist between the two components.

Q: What does the must-operate distance of 16.50mm mean?

A: The must-operate distance specifies the maximum separation between the reed switch and the magnetic actuator at which the switch is guaranteed to close. Both parts operate at this identical distance.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The 59135-4-S-02-A is a direct functional and mechanical equivalent to the 59135-4-S-02-F. No design modifications are required for substitution.