KSC421J70SH Equivalent & Substitute Parts

Part Overview

The KSC421J70SH 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 momentary switching in harsh environments.

The KSC421J70SH carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

KSC421J70SH

C&KIn Stock: 970KSC421J70SH Datasheet

Current PartRFQ

KSC421J 70SH LFS

C&KIn Stock: 48186KSC421J 70SH LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC421J70SH is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must maintain identical specifications in the following areas:

• Circuit configuration (SPST-NO)
• Contact rating (0.05A @ 32VDC)
• Surface mount packaging with J lead termination
• Physical footprint (6.20mm x 6.20mm outline)
• Actuator height (5.20mm vertical)
• Operating force (170gf)
• Switch travel distance (0.50mm)
• Ingress protection rating (IP67)
• Operating temperature range (-40°C to 85°C)
• Mechanical life specification (300,000 cycles)
• Top actuated orientation

The KSC421J70SH is part of the KSC421 base product family. Substitute parts within this family that meet all specified parameters are considered direct equivalents.

Parameter Comparison

Engineering Selection Recommendations

The KSC421J 70SH LFS is a direct functional equivalent to the KSC421J70SH. Both components share identical electrical and mechanical specifications, ensuring pin-for-pin and footprint compatibility.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The KSC421J70SH is classified as obsolete, indicating discontinued manufacturing and limited availability. The KSC421J 70SH LFS maintains active product status with current manufacturing support.

From a compliance perspective, the KSC421J 70SH LFS carries ROHS3 certification, whereas the KSC421J70SH is RoHS non-compliant. For applications subject to RoHS directives or requiring current environmental compliance certifications, the KSC421J 70SH LFS is the appropriate selection.

Both components are REACH Unaffected and carry EAR99 export classification. Packaging differs between bulk format (main part) and Tape & Reel format (substitute), which may influence procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the KSC421J 70SH LFS replace the KSC421J70SH in existing designs?

A: Yes. The KSC421J 70SH LFS is electrically and mechanically equivalent. All critical parameters—contact rating, switching characteristics, physical dimensions, actuator specifications, and environmental ratings—are identical. Direct substitution is possible without design modification.

Q: What is the difference between the packaging formats?

A: The KSC421J70SH is supplied in bulk packaging, while the KSC421J 70SH LFS is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and provides better component protection during handling and storage. Bulk packaging may require manual handling and custom packaging solutions.

Q: Why is the KSC421J70SH listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production of this specific part number. The KSC421J 70SH LFS represents the current active equivalent within the KSC421 product family, ensuring access to components with ongoing manufacturing support.

Q: Are there compliance differences between these parts?

A: Yes. The KSC421J 70SH LFS is ROHS3 compliant, while the KSC421J70SH is RoHS non-compliant. For applications requiring RoHS compliance or subject to environmental regulations, the KSC421J 70SH LFS is the appropriate selection.

Q: Will the KSC421J 70SH LFS work in the same PCB footprint?

A: Yes. Both components share identical outline dimensions (6.20mm x 6.20mm), actuator height (5.20mm), and J lead termination. PCB footprints designed for the KSC421J70SH are directly compatible with the KSC421J 70SH LFS.