KSC621G Equivalent & Substitute Parts

Part Overview

The KSC621G 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. The KSC621G is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain functional compatibility while meeting current manufacturing and compliance requirements.

Substiute Parts

KSC621G

C&KIn Stock: 734KSC621G Datasheet

Current PartRFQ

KSC621GLFS

C&KIn Stock: 14795KSC621GLFS Datasheet

DirectRFQ

1301.9316

SCHURTER Inc.In Stock: 35751301.9316 Datasheet

SimilarRFQ

1301.9317

SCHURTER Inc.In Stock: 63881301.9317 Datasheet

SimilarRFQ

1301.9318

SCHURTER Inc.In Stock: 7911301.9318 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the KSC621G is based on the following critical parameters: circuit configuration (SPST-NO), switch function (Off-Mom), contact rating voltage capability, mounting type (surface mount), actuator orientation (top actuated), and termination style (gull wing). These parameters define the mechanical and electrical interface requirements for direct replacement.

The substitute parts are grouped into two categories:

Direct Equivalent (Same Manufacturer): KSC621GLFS maintains identical electrical specifications, mechanical dimensions, and functional characteristics as the KSC621G. The primary difference is packaging format (Tape & Reel versus bulk) and product status (active versus obsolete).

Similar Substitutes (Alternative Manufacturer): Parts 1301.9316, 1301.9317, and 1301.9318 from SCHURTER Inc. share the same circuit configuration, switch function, mounting type, actuator orientation, and termination style. These parts operate at a lower voltage rating (12VDC versus 32VDC) and exhibit variations in mechanical parameters including actuator height, outline dimensions, operating force, switch travel, ingress protection rating, operating temperature range, and mechanical life cycle rating.

Parameter Comparison

Engineering Selection Recommendations

KSC621GLFS is the primary direct equivalent for KSC621G replacement. This part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. The only functional difference is packaging format (Tape & Reel versus bulk). Selection of KSC621GLFS is appropriate for applications requiring exact parameter matching and modern compliance certifications.

SCHURTER Inc. parts (1301.9316, 1301.9317, 1301.9318) are classified as similar substitutes rather than direct equivalents due to reduced voltage rating (12VDC versus 32VDC), lower mechanical life rating (100,000 cycles versus 300,000 cycles), reduced ingress protection (IP40 versus IP67), and narrower operating temperature range (-20°C ~ 70°C versus -40°C ~ 85°C). These parts are suitable only for applications where the KSC621G's 32VDC rating is not required and where the reduced environmental protection and mechanical life specifications are acceptable. All SCHURTER parts offer ROHS3 compliance and active product status.

Selection between SCHURTER alternatives (1301.9316, 1301.9317, 1301.9318) depends on actuator height requirements: 7.00mm (1301.9316), 7.30mm (1301.9317), or 8.00mm (1301.9318). All three share identical electrical and most mechanical characteristics.

Frequently Asked Questions (FAQ)

Q: Can KSC621GLFS be used as a direct replacement for KSC621G?

A: Yes. KSC621GLFS is electrically and mechanically identical to KSC621G. The parts share the same contact rating (0.05A @ 32VDC), circuit configuration (SPST-NO), mechanical dimensions (6.20mm x 6.20mm), actuator height (7.70mm), operating force (170gf), switch travel (0.40mm), ingress protection (IP67), operating temperature range (-40°C ~ 85°C), and mechanical life (300,000 cycles). KSC621GLFS is currently in active production with ROHS3 compliance.

Q: What is the primary difference between KSC621G and KSC621GLFS?

A: The primary differences are product status and packaging. KSC621G is obsolete and supplied in bulk packaging, while KSC621GLFS is active and supplied in Tape & Reel format. Both parts are electrically and mechanically identical.

Q: Can SCHURTER parts (1301.9316, 1301.9317, 1301.9318) replace KSC621G?

A: SCHURTER parts are similar substitutes with significant parameter differences. They operate at 12VDC (versus 32VDC), provide IP40 protection (versus IP67), support 100,000 mechanical cycles (versus 300,000), and operate within -20°C ~ 70°C (versus -40°C ~ 85°C). Substitution is possible only if the application does not require the higher voltage rating, enhanced environmental protection, extended temperature range, or higher mechanical life cycle rating of the KSC621G.

Q: What are the differences between SCHURTER parts 1301.9316, 1301.9317, and 1301.9318?

A: These three SCHURTER parts are identical except for actuator height. Part 1301.9316 has 7.00mm actuator height, 1301.9317 has 7.30mm, and 1301.9318 has 8.00mm. Selection depends on PCB clearance and mechanical envelope requirements for the specific application.

Q: Are all substitute parts RoHS compliant?

A: KSC621G is RoHS non-compliant. KSC621GLFS and all SCHURTER parts (1301.9316, 1301.9317, 1301.9318) are ROHS3 compliant. For applications requiring RoHS compliance, KSC621GLFS or SCHURTER alternatives must be selected.

Q: What packaging formats are available?

A: KSC621G is supplied in bulk packaging. KSC621GLFS is supplied in Tape & Reel format. SCHURTER parts (1301.9316, 1301.9317, 1301.9318) are supplied in bulk packaging.