KSC221G Equivalent & Substitute Parts

Part Overview

The KSC221G 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 KSC221G is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Substiute Parts

KSC221G

C&KIn Stock: 1016KSC221G Datasheet

Current PartRFQ

KSC221GLFS

C&KIn Stock: 23956KSC221GLFS Datasheet

DirectRFQ

CB315FP

NKK SwitchesIn Stock: 2464CB315FP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KSC221G are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Circuit configuration (SPST-NO)
• Switch function (Off-Mom)
• Mounting type (Surface Mount)
• Actuator orientation (Top Actuated)
• Termination style (Gull Wing)
• Outline dimensions (6.20mm x 6.20mm)

Secondary Compatibility Criteria:

• Contact rating voltage and current capacity
• Actuator height and switch travel
• Operating force
• Operating temperature range
• Mechanical life rating
• Ingress protection level

The KSC221G has two identified substitutes: KSC221GLFS (direct equivalent from C&K) and CB315FP (similar part from NKK Switches). The KSC221GLFS maintains identical electrical and mechanical specifications while offering active product status and improved compliance. The CB315FP provides functional substitution with noted parameter variations in voltage rating, actuator height, operating force, temperature range, and mechanical life.

Parameter Comparison

Engineering Selection Recommendations

KSC221GLFS (Direct Equivalent): The KSC221GLFS is the primary substitute for the obsolete KSC221G. This part maintains identical electrical specifications (0.05A @ 32VDC), mechanical characteristics (4.60mm actuator height, 0.35mm travel, 200gf operating force), and physical footprint (6.20mm x 6.20mm). The KSC221GLFS carries active product status and achieves ROHS3 compliance, addressing regulatory requirements that the original KSC221G does not meet. Packaging is available in Cut Tape and Digi-Reel formats with substantial inventory availability (23,943 pieces).

CB315FP (Functional Substitute): The CB315FP from NKK Switches provides functional substitution when KSC221GLFS availability is constrained. This part shares the same circuit configuration (SPST-NO), mounting type (Surface Mount), actuator orientation (Top Actuated), termination style (Gull Wing), and outline dimensions (6.20mm x 6.20mm). However, the CB315FP operates at a reduced voltage rating (24VDC versus 32VDC), features a lower actuator height (3.10mm versus 4.60mm), reduced operating force (157gf versus 200gf), shorter switch travel (0.25mm versus 0.35mm), narrower operating temperature range (-25°C to 70°C versus -40°C to 85°C), and significantly lower mechanical life rating (100,000 cycles versus 500,000 cycles). The CB315FP is suitable only for applications where these parameter reductions are acceptable and the 24VDC rating is sufficient.

Frequently Asked Questions (FAQ)

Q: Can KSC221GLFS be used as a direct replacement for KSC221G? A: Yes. The KSC221GLFS is a direct equivalent with identical electrical and mechanical specifications. It maintains the same contact rating (0.05A @ 32VDC), actuator height (4.60mm), operating force (200gf), switch travel (0.35mm), mechanical life (500,000 cycles), and physical footprint (6.20mm x 6.20mm). The primary advantage is active product status and ROHS3 compliance.

Q: What are the key differences between KSC221GLFS and CB315FP? A: The KSC221GLFS maintains all original KSC221G specifications. The CB315FP differs in five critical parameters: voltage rating (24VDC versus 32VDC), actuator height (3.10mm versus 4.60mm), operating force (157gf versus 200gf), switch travel (0.25mm versus 0.35mm), and mechanical life (100,000 cycles versus 500,000 cycles). The CB315FP also has a narrower operating temperature range (-25°C to 70°C versus -40°C to 85°C).

Q: Is CB315FP suitable for all applications using KSC221G? A: No. The CB315FP is suitable only for applications where the reduced voltage rating (24VDC), lower mechanical life (100,000 cycles), narrower temperature range, and different actuator characteristics are acceptable. Applications requiring the full 32VDC rating, extended temperature operation (-40°C to 85°C), or higher cycle life (500,000 cycles) must use KSC221GLFS.

Q: What packaging options are available for these substitutes? A: KSC221GLFS is available in Cut Tape (CT) and Digi-Reel packaging formats. CB315FP is supplied in Tray packaging.

Q: Are both substitutes RoHS compliant? A: Yes. Both KSC221GLFS and CB315FP are ROHS3 compliant. The original KSC221G is RoHS non-compliant.

Q: What is the inventory status for these parts? A: KSC221GLFS has 23,943 pieces in stock. CB315FP has 2,453 pieces in stock.