KSR221G Equivalent & Substitute Parts

Part Overview

The KSR221G 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, rubber actuator material, and is designed for applications requiring momentary switching functionality. The KSR221G is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing production and maintenance applications. The KSR221GLFS serves as the direct active substitute, offering identical electrical and mechanical specifications with improved compliance status.

Substiute Parts

KSR221G

C&KIn Stock: 1101KSR221G Datasheet

Current PartRFQ

KSR221GLFS

C&KIn Stock: 9080KSR221GLFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The KSR221GLFS is classified as a direct manufacturer substitute for the KSR221G based on identical electrical and mechanical parameters. Substitution eligibility is determined by the following critical parameters:

• Circuit configuration: SPST-NO
• Contact rating: 0.05A @ 32VDC
• Mounting type: Surface Mount
• Actuator orientation: Top Actuated
• Actuator height: 2.50mm
• Outline dimensions: 6.00mm x 3.80mm
• Termination style: Gull Wing
• Operating force: 200gf
• Switch travel: 0.30mm
• Operating temperature range: -40°C ~ 85°C
• Mechanical life: 100,000 Cycles
• Ingress protection: IP50

The KSR221GLFS maintains complete parameter alignment with the KSR221G across all electrical and mechanical specifications. The primary distinction lies in product status and regulatory compliance, with the KSR221GLFS classified as Active and RoHS3 Compliant, compared to the obsolete status of the KSR221G.

Parameter Comparison

Engineering Selection Recommendations

The KSR221GLFS is the appropriate selection for new designs and production applications requiring KSR221G functionality. The substitute part maintains complete electrical and mechanical compatibility while offering the following advantages:

• Active product status ensures ongoing manufacturer support and availability
• RoHS3 compliance satisfies current regulatory requirements for electronic components in most jurisdictions
• Identical electrical specifications (0.05A @ 32VDC, SPST-NO configuration) ensure direct functional equivalence
• Identical mechanical specifications (2.50mm actuator height, 6.00mm x 3.80mm outline, gull wing termination) guarantee PCB layout compatibility without redesign
• Cut Tape packaging provides standard supply chain handling

For legacy systems currently utilizing the KSR221G, the KSR221GLFS provides a direct replacement without circuit modification or PCB redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the KSR221GLFS be used as a direct replacement for the KSR221G in existing designs?

A: Yes. The KSR221GLFS maintains identical electrical and mechanical specifications, including circuit configuration (SPST-NO), contact rating (0.05A @ 32VDC), mounting type (surface mount), actuator height (2.50mm), outline dimensions (6.00mm x 3.80mm), and termination style (gull wing). No circuit modification or PCB redesign is required.

Q: What is the primary difference between the KSR221G and KSR221GLFS?

A: The KSR221G is classified as obsolete with RoHS non-compliant status, while the KSR221GLFS is an active product with RoHS3 compliance. All electrical and mechanical parameters are identical.

Q: Are there packaging differences between these parts?

A: The KSR221G packaging specification is not defined in the available data. The KSR221GLFS is supplied in Cut Tape (CT) packaging, which is standard for surface mount tactile switches and compatible with automated assembly processes.

Q: What parameters must remain identical for substitution eligibility?

A: Critical parameters for substitution include circuit configuration (SPST-NO), contact rating (0.05A @ 32VDC), mounting type (surface mount), actuator orientation (top actuated), actuator height (2.50mm), outline dimensions (6.00mm x 3.80mm), termination style (gull wing), operating force (200gf), switch travel (0.30mm), operating temperature range (-40°C ~ 85°C), mechanical life (100,000 cycles), and ingress protection (IP50).

Q: Is the KSR221GLFS suitable for applications with RoHS compliance requirements?

A: Yes. The KSR221GLFS is RoHS3 compliant, satisfying regulatory requirements for electronic components in applications subject to RoHS directives.