KSC221J Equivalent & Substitute Parts

Part Overview

The KSC221J 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 KSC221J is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications.

Substiute Parts

KSC221J

C&KIn Stock: 238503KSC221J Datasheet

Current PartRFQ

KSC221JLFS

C&KIn Stock: 10137KSC221JLFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC221J is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part KSC221JLFS maintains identical specifications in circuit configuration (SPST-NO), contact rating (0.05A @ 32VDC), actuator geometry (4.60mm height, 6.20mm x 6.20mm outline), operating force (200gf), switch travel (0.35mm), ingress protection (IP67), operating temperature range (-40°C to 85°C), mechanical life (500,000 cycles), and termination style (J Lead). The primary distinction between these parts is packaging format and product status, with KSC221JLFS supplied in Tape & Reel format and maintaining active product status, whereas KSC221J is obsolete.

Parameter Comparison

Engineering Selection Recommendations

KSC221JLFS is the direct functional equivalent to KSC221J and serves as the primary substitute for obsolete inventory replacement. Selection of KSC221JLFS is supported by three key factors: (1) identical electrical and mechanical specifications across all critical parameters, (2) active product status ensuring continued availability and supply chain reliability, and (3) ROHS3 compliance, which addresses regulatory requirements for new designs and manufacturing processes. The transition from KSC221J to KSC221JLFS requires no circuit redesign or PCB layout modification, as both parts share identical footprints, pin configurations, and performance characteristics. Packaging format differences (bulk versus Tape & Reel) affect only procurement and assembly logistics, not functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can KSC221JLFS be used as a direct replacement for KSC221J in existing designs?

A: Yes. KSC221JLFS is electrically and mechanically identical to KSC221J. Both parts feature the same SPST-NO circuit configuration, 0.05A @ 32VDC contact rating, 4.60mm actuator height, 6.20mm x 6.20mm footprint, 200gf operating force, 0.35mm switch travel, IP67 ingress protection, and J Lead termination. No design changes are required.

Q: What is the primary difference between KSC221J and KSC221JLFS?

A: The primary differences are product status and packaging. KSC221J is obsolete and supplied in bulk packaging, while KSC221JLFS is an active product supplied in Tape & Reel format. Additionally, KSC221JLFS is ROHS3 compliant, whereas KSC221J is RoHS non-compliant.

Q: Are there any compatibility concerns with PCB assembly when switching from KSC221J to KSC221JLFS?

A: No compatibility concerns exist. Both parts are surface mount components with identical outline dimensions (6.20mm x 6.20mm), J Lead termination, and actuator geometry. PCB footprints, solder pad layouts, and assembly processes remain unchanged.

Q: Does the Tape & Reel packaging of KSC221JLFS affect component performance?

A: No. Tape & Reel packaging is a supply and assembly format only. It does not affect electrical performance, mechanical characteristics, or functional behavior of the component.

Q: Is ROHS3 compliance of KSC221JLFS a requirement for substitution?

A: ROHS3 compliance is a regulatory advantage of KSC221JLFS for new designs and manufacturing processes subject to RoHS directives. For existing designs using KSC221J, compliance status does not affect functional substitution, but regulatory requirements for your application should be evaluated.