KSH251J 50 LFS Equivalent & Substitute Parts

Part Overview

The KSH251J 50 LFS is a tactile switch manufactured by C&K, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.05A at 12VDC. This surface mount component features top actuation with a square button actuator and is designed for off-momentary switch function applications. The product is currently obsolete, making identification of equivalent substitute parts essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

KSH251J 50 LFS

C&KIn Stock: 1080KSH251J 50 LFS Datasheet

Current PartRFQ

95CW06E5JT

Grayhill Inc.In Stock: 82395CW06E5JT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSH251J 50 LFS is determined by strict equivalence across the following critical parameters:

Electrical Compatibility: Circuit configuration (SPST-NO), contact rating (0.05A @ 12VDC), and switch function (Off-Mom) must remain identical.

Mechanical Compatibility: Surface mount mounting type, top actuated orientation, J lead termination style, and outline dimensions (6.30mm x 6.30mm nominal) must be maintained to ensure PCB footprint compatibility.

Environmental & Reliability: Operating temperature range, mechanical life rating, and moisture sensitivity level determine functional equivalence in the target application environment.

The substitute part 95CW06E5JT from Grayhill Inc. meets these core substitution criteria while maintaining electrical and mechanical compatibility with the original KSH251J 50 LFS design.

Parameter Comparison

Engineering Selection Recommendations

The 95CW06E5JT from Grayhill Inc. is the qualified substitute for the obsolete KSH251J 50 LFS. Both components maintain identical electrical specifications (SPST-NO circuit, 0.05A @ 12VDC contact rating) and mechanical compatibility (surface mount, top actuated, J lead termination). The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

The 95CW06E5JT carries ROHS3 compliance certification, meeting current regulatory requirements. Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating, suitable for standard storage and handling conditions.

Dimensional variations exist: the substitute exhibits a 0.20mm reduction in outline width (6.20mm vs. 6.30mm) and a 0.20mm increase in actuator height (5.20mm vs. 5.00mm). These minor differences remain within typical PCB layout tolerances for surface mount applications. The substitute provides superior mechanical life (500,000 cycles vs. 100,000 cycles), extending component reliability in high-cycle applications.

Operating temperature range differs: the substitute operates within -25°C to 70°C versus the original -40°C to 90°C. Application environments requiring extended temperature extremes must be evaluated against this specification change.

Frequently Asked Questions (FAQ)

Q: Can the 95CW06E5JT directly replace the KSH251J 50 LFS on existing PCBs?

A: Yes, for most applications. Both components share identical circuit configuration (SPST-NO), contact rating (0.05A @ 12VDC), mounting type (surface mount), and termination style (J lead). Minor dimensional variations (0.20mm outline width reduction, 0.20mm actuator height increase) typically remain within standard PCB layout tolerances. Verify specific PCB clearance requirements for your design before implementation.

Q: What are the key electrical differences between these parts?

A: There are no electrical differences. Both components maintain identical SPST-NO circuit configuration, off-momentary switch function, and 0.05A @ 12VDC contact rating. Electrical compatibility is complete.

Q: How do the mechanical specifications differ?

A: Switch travel differs significantly: the KSH251J 50 LFS has 1.30mm travel versus 0.45mm for the 95CW06E5JT. Operating force is comparable (350gf vs. 360gf). The substitute provides substantially higher mechanical life (500,000 cycles vs. 100,000 cycles). Actuator height increases by 0.20mm (5.20mm vs. 5.00mm), and outline width decreases by 0.20mm (6.20mm vs. 6.30mm).

Q: Are there temperature range limitations with the substitute?

A: Yes. The 95CW06E5JT operates within -25°C to 70°C, compared to the original -40°C to 90°C range. Applications requiring operation below -25°C or above 70°C must be evaluated separately. Standard industrial environments typically fall within the substitute's operating range.

Q: What compliance certifications apply to the substitute part?

A: The 95CW06E5JT carries ROHS3 compliance and maintains REACH Unaffected status. Both certifications meet current regulatory requirements for electronic component procurement and use.

Q: Is the substitute part currently available?

A: Yes. The 95CW06E5JT is in active production status with documented inventory availability, ensuring reliable supply chain access compared to the obsolete KSH251J 50 LFS.