KSC421G70SH Equivalent & Substitute Parts

Part Overview

The KSC421G70SH 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, gull wing termination, and IP67 ingress protection suitable for dust-tight and waterproof applications. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

KSC421G70SH

C&KIn Stock: 851KSC421G70SH Datasheet

Current PartRFQ

KSC421G 70SH LFS

C&KIn Stock: 62156KSC421G 70SH LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC421G70SH is determined by strict equivalence across the following critical parameters:

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

The KSC421G 70SH LFS meets all these parameters while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The KSC421G 70SH LFS is the direct functional equivalent of the obsolete KSC421G70SH. Both components share identical electrical and mechanical specifications, ensuring pin-for-pin and footprint compatibility. The substitute part offers two significant advantages: active product status with ongoing manufacturer support and ROHS3 compliance, compared to the non-compliant status of the original part. For new designs or production transitions, the KSC421G 70SH LFS is the appropriate selection. The packaging difference (Tape & Reel versus bulk) reflects standard distribution formats and does not affect component functionality or PCB assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Are the KSC421G70SH and KSC421G 70SH LFS electrically identical?

A: Yes. Both components feature identical circuit configuration (SPST-NO), contact rating (0.05A @ 32VDC), operating force (170gf), switch travel (0.50mm), and mechanical life (300,000 cycles). Electrical performance is equivalent.

Q: Can the KSC421G 70SH LFS be used as a direct replacement on existing PCBs designed for the KSC421G70SH?

A: Yes. The substitute part maintains identical surface mount footprint (6.20mm x 6.20mm), gull wing termination, actuator height (5.20mm), and top actuation orientation. No PCB redesign is required.

Q: What is the significance of the packaging difference between these parts?

A: The KSC421G70SH is supplied in bulk packaging, while the KSC421G 70SH LFS is supplied in Tape & Reel format. This difference affects procurement and assembly logistics but does not impact component performance or compatibility.

Q: Why is RoHS compliance important for this substitution?

A: The KSC421G 70SH LFS is ROHS3 compliant, whereas the original part is non-compliant. For applications subject to RoHS regulations or customer requirements, the substitute part ensures regulatory compliance without functional compromise.

Q: Are there any environmental or operational limitations when substituting these parts?

A: No. Both parts operate across the identical temperature range (-40°C ~ 85°C), maintain IP67 ingress protection, and share equivalent moisture sensitivity levels (MSL 1 - Unlimited). Environmental performance is unchanged.