KSC401J 50 SH Equivalent & Substitute Parts

Part Overview

The KSC401J 50 SH 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 32VDC. This surface mount component features top actuation, IP67 ingress protection, and is designed for applications requiring reliable tactile feedback with minimal travel distance.

The KSC401J 50 SH carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for legacy systems.

Substiute Parts

KSC401J 50 SH

C&KIn Stock: 1041KSC401J 50 SH Datasheet

Current PartRFQ

KSC401J 50SH LFS

C&KIn Stock: 97124KSC401J 50SH LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC401J 50 SH is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: SPST-NO topology must be maintained
• Electrical Rating: Contact rating of 0.05A @ 32VDC is non-negotiable
• Physical Compatibility: Surface mount package with 6.20mm x 6.20mm outline and 5.20mm actuator height
• Mechanical Characteristics: Operating force of 145gf and 0.50mm switch travel
• Environmental Performance: IP67 ingress protection and -40°C ~ 85°C operating range
• Mechanical Durability: 5,000,000 cycle mechanical life specification

The substitute part KSC401J 50SH LFS meets all these parameters identically, with the primary distinction being packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The KSC401J 50SH LFS is a direct functional equivalent to the KSC401J 50 SH. All electrical, mechanical, and dimensional specifications are identical.

Product Status Consideration: The KSC401J 50 SH is obsolete, while the KSC401J 50SH LFS maintains active product status with significantly higher inventory availability (97,024 units versus 948 units). This ensures long-term supply chain reliability.

Compliance Advantage: The KSC401J 50SH LFS is ROHS3 compliant, whereas the original part is RoHS non-compliant. For new designs or systems subject to regulatory requirements, the substitute part provides compliance alignment.

Packaging Consideration: The substitute part is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. The original part is supplied in bulk packaging. Packaging format does not affect electrical or mechanical performance.

Both parts share identical REACH and ECCN classifications (REACH Unaffected, EAR99).

Frequently Asked Questions (FAQ)

Q: Can KSC401J 50SH LFS be used as a direct replacement for KSC401J 50 SH in existing designs?

A: Yes. All functional parameters—circuit configuration, electrical rating, mechanical characteristics, and environmental specifications—are identical. The parts are electrically and mechanically interchangeable.

Q: What is the difference between the two part numbers?

A: The primary differences are product status (obsolete versus active), packaging format (bulk versus Tape & Reel), and RoHS compliance status. The "LFS" suffix in the substitute part number indicates Tape & Reel packaging and updated compliance certification.

Q: Does the Tape & Reel packaging affect component performance?

A: No. Packaging format is a supply and assembly consideration only. It does not alter electrical performance, mechanical characteristics, or reliability specifications.

Q: Why is RoHS compliance relevant if the original part is non-compliant?

A: RoHS compliance becomes critical for new production runs, system redesigns, or markets with regulatory requirements. The substitute part's ROHS3 compliance eliminates potential regulatory barriers for future applications.

Q: Are there inventory implications for selecting the substitute part?

A: Yes. The KSC401J 50SH LFS has substantially higher inventory availability (97,024 units) compared to the obsolete KSC401J 50 SH (948 units). This ensures consistent supply for ongoing production requirements.

Q: Is the MSL (Moisture Sensitivity Level) the same for both parts?

A: Yes. Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.