KSC121G Equivalent & Substitute Parts

Part Overview

The KSC121G 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 KSC121G is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

KSC121G

C&KIn Stock: 784KSC121G Datasheet

Current PartRFQ

KSC121GLFS

C&KIn Stock: 10128KSC121GLFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC121G is based on electrical and mechanical parameter equivalence within the KSC series. The substitute part KSC121GLFS maintains identical functional specifications across all critical parameters: SPST-NO circuit configuration, 0.05A @ 32VDC contact rating, 2.50mm actuator height, 6.20mm x 6.20mm outline, 180gf operating force, 0.30mm switch travel, 200,000 cycle mechanical life, -40°C to 85°C operating temperature range, IP67 ingress protection, and gull wing termination.

The primary distinction between KSC121G and KSC121GLFS is packaging format and product status. KSC121G is supplied in standard packaging as an obsolete part, while KSC121GLFS is supplied in Tape & Reel (TR) format and maintains active product status. Both parts share the same base product number (KSC121) and are manufactured by C&K.

Parameter Comparison

Engineering Selection Recommendations

The KSC121GLFS is the direct functional equivalent for the obsolete KSC121G. Both parts are manufactured by C&K within the same KSC series and share identical electrical and mechanical specifications. Selection of KSC121GLFS is supported by its active product status, ensuring continued availability and supply chain reliability.

KSC121GLFS provides improved regulatory compliance with ROHS3 certification, compared to the non-compliant status of KSC121G. Both parts maintain REACH Unaffected status and EAR99 export classification.

For applications requiring the KSC121G, KSC121GLFS is the appropriate substitute. Packaging format differs (Tape & Reel versus standard packaging), which may affect procurement quantities and handling procedures but does not impact functional performance or PCB integration.

Frequently Asked Questions (FAQ)

Q: Can KSC121GLFS directly replace KSC121G in existing designs?

A: Yes. KSC121GLFS is functionally equivalent to KSC121G across all electrical and mechanical parameters. Outline dimensions, mounting footprint, actuator height, contact rating, and operating characteristics are identical. No design modifications are required.

Q: What is the difference between KSC121G and KSC121GLFS?

A: The primary differences are product status and packaging format. KSC121G is obsolete and supplied in standard packaging. KSC121GLFS is active and supplied in Tape & Reel (TR) format. KSC121GLFS also carries ROHS3 compliance certification, whereas KSC121G is RoHS non-compliant.

Q: Are there any compatibility concerns with Tape & Reel packaging?

A: No compatibility concerns exist. Tape & Reel packaging is standard for high-volume surface mount assembly. The component itself is identical; only the delivery format differs. Tape & Reel packaging is suitable for automated pick-and-place assembly equipment.

Q: Do both parts share the same PCB footprint?

A: Yes. Both KSC121G and KSC121GLFS have identical outline dimensions (6.20mm x 6.20mm), gull wing termination, and surface mount configuration. PCB footprints are interchangeable.

Q: What certifications apply to KSC121GLFS?

A: KSC121GLFS is ROHS3 compliant and REACH Unaffected. Both parts carry EAR99 export classification and HTSUS code 8536.50.9031.