KSR211J Equivalent & Substitute Parts

Part Overview

The KSR211J 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 with a 2.50mm actuator height and is designed for applications requiring momentary switching functionality. The KSR211J is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing production and maintenance applications.

Substiute Parts

KSR211J

C&KIn Stock: 890KSR211J Datasheet

Current PartRFQ

KSR211GLFS

C&KIn Stock: 9803KSR211GLFS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSR211J is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: SPST-NO topology must be maintained
• Contact Rating: 0.05A @ 32VDC electrical specification
• Mounting Type: Surface mount compatibility required
• Actuator Height: 2.50mm vertical dimension
• Actuator Orientation: Top actuated design
• Outline Dimensions: 6.00mm x 3.80mm footprint
• Operating Force: 180gf actuation force
• Switch Travel: 0.25mm displacement
• Operating Temperature: -40°C ~ 85°C range
• Mechanical Life: 100,000 cycles minimum

The KSR211GLFS meets all these parameters. The primary difference is the termination style (Gull Wing vs. J Lead) and product status (Active vs. Obsolete), with the substitute offering improved availability and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The KSR211GLFS is the direct functional equivalent to the KSR211J across all critical electrical and mechanical parameters. Selection between these parts should be based on the following factors:

For New Designs or Production Continuation: The KSR211GLFS is the recommended choice. It maintains identical electrical performance and mechanical specifications while offering active product status and RoHS3 compliance. The gull wing termination style is compatible with standard surface mount assembly processes.

PCB Layout Considerations: The termination style difference (J Lead vs. Gull Wing) requires PCB footprint verification. Gull wing leads are standard for modern surface mount assembly and provide improved solder joint reliability compared to J lead configurations.

Compliance Requirements: If RoHS3 compliance is mandated for your application, the KSR211GLFS is the only option from this comparison set.

Inventory and Lead Time: The KSR211GLFS has significantly higher inventory availability (9700 pcs vs. 804 pcs), reducing procurement risk and lead time variability.

Frequently Asked Questions (FAQ)

Q: Can the KSR211GLFS be used as a direct replacement for the KSR211J on existing PCBs?

A: Electrical and mechanical compatibility is confirmed across all functional parameters. However, the termination style differs (Gull Wing vs. J Lead), requiring PCB footprint verification. If your existing design uses J lead footprints, the PCB layout must be updated to accommodate gull wing leads, or a custom adapter approach must be evaluated.

Q: What is the significance of the termination style difference?

A: Termination style affects the solder joint geometry and assembly process compatibility. Gull wing leads are the industry standard for modern surface mount assembly and provide superior solder joint reliability. J lead termination is less common in current manufacturing processes.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts maintain identical contact ratings (0.05A @ 32VDC), operating force (180gf), switch travel (0.25mm), and mechanical life (100,000 cycles). Electrical performance is equivalent.

Q: Why is RoHS compliance different between these parts?

A: The KSR211J is listed as RoHS non-compliant, while the KSR211GLFS is RoHS3 compliant. This reflects manufacturing process updates and material composition changes implemented by C&K. For applications subject to RoHS regulations, the KSR211GLFS is the compliant option.

Q: What is the impact of the different packaging options?

A: The KSR211J uses standard packaging, while the KSR211GLFS is available in Cut Tape (CT) and Digi-Reel® formats. This affects handling, storage, and automated assembly compatibility but does not impact component performance.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both parts operate across -40°C to 85°C, making them suitable for identical thermal environments.