KSC343J Equivalent & Substitute Parts

Part Overview

The KSC343J is a tactile switch manufactured by C&K, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.01A 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 KSC343J is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications.

Substiute Parts

KSC343J

C&KIn Stock: 5501KSC343J Datasheet

Current PartRFQ

KSC343JLFG

C&KIn Stock: 2109KSC343JLFG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KSC343J is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Must be SPST-NO
• Contact Rating: Must be 0.01A @ 32VDC
• Mounting Type: Must be Surface Mount
• Actuator Height: Must be 4.60mm
• Outline Dimensions: Must be 6.20mm x 6.20mm
• Operating Force: Must be 300gf
• Switch Travel: Must be 0.20mm
• Ingress Protection: Must be IP67
• Operating Temperature Range: Must be -40°C to 125°C
• Mechanical Life: Must be 300,000 Cycles
• Termination Style: Must be J Lead

The KSC343JLFG meets all electrical and mechanical parameters required for direct substitution. The primary distinction is packaging format and product status compliance.

Parameter Comparison

Engineering Selection Recommendations

The KSC343JLFG is the direct functional equivalent to the obsolete KSC343J. Both components share identical electrical specifications, mechanical dimensions, and performance characteristics. The KSC343JLFG is currently in active production status, ensuring long-term availability and supply chain continuity.

Key differentiation factors:

• Product Status: KSC343JLFG is Active, whereas KSC343J is Obsolete
• RoHS Compliance: KSC343JLFG meets ROHS3 requirements; KSC343J is non-compliant
• Packaging Format: KSC343JLFG is supplied in Tape & Reel format, optimized for automated assembly processes

For new designs or production transitions, KSC343JLFG is the appropriate selection. The component maintains full electrical and mechanical compatibility while providing compliance with current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can KSC343JLFG be used as a direct replacement for KSC343J in existing designs?

A: Yes. Both components are electrically and mechanically identical. They share the same circuit configuration (SPST-NO), contact rating (0.01A @ 32VDC), physical dimensions (6.20mm x 6.20mm), actuator height (4.60mm), operating force (300gf), switch travel (0.20mm), and mechanical life (300,000 cycles). PCB layout and schematic integration require no modification.

Q: What is the difference between the packaging formats?

A: KSC343J is supplied in bulk packaging, while KSC343JLFG is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for high-volume automated assembly operations and provides improved component handling and placement accuracy.

Q: Does the RoHS compliance difference affect functional performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical or mechanical performance. Both components operate identically within specified parameters. KSC343JLFG's ROHS3 compliance ensures alignment with current environmental and regulatory requirements.

Q: Are there any thermal or environmental performance differences?

A: No. Both components operate across the identical temperature range (-40°C to 125°C) and maintain the same IP67 ingress protection rating. Environmental performance characteristics are equivalent.

Q: What is the mechanical life expectancy for both components?

A: Both KSC343J and KSC343JLFG are rated for 300,000 mechanical cycles at the specified operating force of 300gf and switch travel of 0.20mm.