KSC641J Equivalent & Substitute Parts

Part Overview

The KSC641J 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 a 340gf operating force. The KSC641J is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications.

Substiute Parts

KSC641J

C&KIn Stock: 1966KSC641J Datasheet

Current PartRFQ

KSC641JLFS

C&KIn Stock: 8494KSC641JLFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC641J is determined by strict equivalence across all electrical and mechanical parameters. The substitute part KSC641JLFS maintains identical specifications in the following critical areas:

• Circuit configuration (SPST-NO)
• Contact rating (0.05A @ 32VDC)
• Physical dimensions (6.20mm x 6.20mm outline, 7.70mm actuator height)
• Mechanical characteristics (340gf operating force, 0.40mm travel, 300,000 cycle life)
• Environmental performance (IP67 ingress protection, -40°C ~ 85°C operating range)
• Termination style (J Lead)
• Moisture sensitivity (MSL 1)

The primary distinction between these parts is product status and packaging configuration, with KSC641JLFS available in active production status with Tape & Reel packaging, whereas KSC641J is obsolete with standard packaging.

Parameter Comparison

Engineering Selection Recommendations

The KSC641JLFS is the direct functional equivalent of the KSC641J and serves as the appropriate substitute for new designs and production continuity. Selection of KSC641JLFS is supported by the following factors:

• Identical electrical and mechanical specifications ensure drop-in compatibility
• Active product status guarantees ongoing availability and supply chain reliability
• ROHS3 compliance aligns with current regulatory requirements, whereas the original KSC641J is non-compliant
• Tape & Reel packaging is standard for high-volume manufacturing operations
• All certifications and environmental ratings remain equivalent

For applications where RoHS compliance is not a requirement, the KSC641J may remain functional if inventory is available; however, KSC641JLFS is the recommended selection for new implementations.

Frequently Asked Questions (FAQ)

Q: Can KSC641JLFS be used as a direct replacement for KSC641J in existing designs?

A: Yes. The KSC641JLFS maintains identical electrical ratings (0.05A @ 32VDC), mechanical dimensions (6.20mm x 6.20mm, 7.70mm height), operating force (340gf), and environmental specifications (IP67, -40°C ~ 85°C). PCB layout and assembly processes require no modification.

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

A: The KSC641J is obsolete with standard packaging, while KSC641JLFS is in active production with Tape & Reel packaging. Additionally, KSC641JLFS is ROHS3 compliant, whereas KSC641J is non-compliant.

Q: Does the Tape & Reel packaging affect electrical or mechanical performance?

A: No. Packaging format is a supply and handling consideration only. Electrical characteristics, contact ratings, and mechanical performance are identical between standard and Tape & Reel configurations.

Q: Are there any compatibility concerns with PCB assembly equipment?

A: No. Both parts use identical J Lead termination, outline dimensions, and surface mount configuration. Standard pick-and-place equipment and reflow processes are compatible with both variants.

Q: What certifications apply to both parts?

A: Both parts carry REACH Unaffected and EAR99 ECCN classifications. KSC641JLFS additionally meets ROHS3 compliance requirements. Both maintain MSL 1 (Unlimited) moisture sensitivity rating.