KSC403J 50 SH Equivalent & Substitute Parts

Part Overview

The KSC403J 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 0.01A 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 KSC403J 50 SH is currently listed as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this switch.

Substiute Parts

KSC403J 50 SH

C&KIn Stock: 967KSC403J 50 SH Datasheet

Current PartRFQ

KSC403J 50SH LFG

C&KIn Stock: 23332KSC403J 50SH LFG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC403J 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 0.01A @ 32VDC is mandatory
• Physical Dimensions: Outline of 6.20mm x 6.20mm and actuator height of 5.20mm ensure PCB layout compatibility
• Mechanical Characteristics: Operating force of 120gf and switch travel of 0.30mm define tactile response and actuation behavior
• Environmental Performance: IP67 ingress protection and -40°C ~ 125°C operating range must be preserved
• Mounting Interface: Surface mount with J Lead termination is required for assembly compatibility

The KSC403J 50SH LFG meets all these parameters identically, establishing it as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The KSC403J 50SH LFG is a direct functional equivalent to the KSC403J 50 SH across all critical electrical, mechanical, and dimensional parameters. The substitute part is currently in active production status, ensuring long-term availability and supply chain stability.

The KSC403J 50SH LFG carries ROHS3 compliance, whereas the original part is RoHS non-compliant. Both parts maintain REACH Unaffected status and EAR99 export classification. The substitute part is available in Cut Tape (CT) packaging with significantly higher inventory levels (23,300 pcs vs. 915 pcs), supporting production scalability.

Selection of the KSC403J 50SH LFG as a replacement is supported by identical functional performance, improved regulatory compliance, and superior component availability.

Frequently Asked Questions (FAQ)

Q: Can the KSC403J 50SH LFG be used as a direct replacement for the KSC403J 50 SH?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including circuit configuration, contact rating, dimensions, operating force, and environmental performance. No circuit redesign or PCB layout modification is required.

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

A: The primary differences are product status and regulatory compliance. The KSC403J 50 SH is obsolete and RoHS non-compliant, while the KSC403J 50SH LFG is in active production and ROHS3 compliant. The "LFG" suffix indicates the lead-free, RoHS3 compliant variant.

Q: Are there packaging differences between these parts?

A: The original part number does not specify packaging format. The substitute part is supplied in Cut Tape (CT) packaging, which is standard for surface mount component distribution and is compatible with automated assembly equipment.

Q: Will the substitute part work in existing designs without modification?

A: Yes. The KSC403J 50SH LFG maintains identical footprint, pin configuration, and electrical characteristics. Existing PCB designs, schematics, and assembly processes require no changes.

Q: Why should I transition to the KSC403J 50SH LFG?

A: The substitute part offers improved component availability, active manufacturing status, and ROHS3 regulatory compliance. These factors support long-term design sustainability and supply chain reliability.