KSL1A211 Equivalent & Substitute Parts

Part Overview

The KSL1A211 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 component features top actuation, through-hole mounting, and a grounding pin for enhanced reliability. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

KSL1A211

C&KIn Stock: 910KSL1A211 Datasheet

Current PartRFQ

TL6105DF160QP

E-SwitchIn Stock: 1314TL6105DF160QP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSL1A211 is determined by the following critical parameters:

Electrical Compatibility:

• Circuit configuration must remain SPST-NO
• Contact rating voltage must equal or exceed 32VDC (50VDC acceptable)
• Current rating of 0.05A is the baseline requirement

Mechanical Compatibility:

• Mounting type must be Through Hole
• Actuator orientation must be Top Actuated
• Outline dimensions must be within acceptable PCB layout tolerances (7.40mm x 7.40mm baseline)
• Actuator height must accommodate existing mechanical clearances (9.90mm baseline)
• Termination style must be PC Pin for direct board integration

Functional Requirements:

• Switch function Off-Mom (momentary operation)
• Grounding pin presence for signal integrity
• Operating temperature range must support -40°C ~ 90°C minimum

The TL6105DF160QP from E-Switch satisfies these substitution criteria through equivalent electrical ratings, identical circuit topology, matching mechanical form factor, and compatible termination methodology.

Parameter Comparison

Engineering Selection Recommendations

The TL6105DF160QP is a direct functional substitute for the obsolete KSL1A211. Selection of this alternative is supported by the following engineering factors:

Product Status & Availability: The KSL1A211 is obsolete, whereas the TL6105DF160QP is in active production with confirmed inventory of 1213 units. This ensures long-term component availability and supply chain continuity.

Regulatory Compliance: The TL6105DF160QP achieves ROHS3 compliance, meeting current environmental and regulatory standards. The original KSL1A211 is RoHS non-compliant, making the substitute the appropriate choice for new designs and updated production runs.

Electrical Performance: The substitute's 50VDC contact rating exceeds the original 32VDC requirement, providing additional voltage margin. Current rating remains identical at 0.05A, ensuring equivalent electrical performance within the application's design envelope.

Mechanical Integration: Outline dimensions of 7.20mm x 7.20mm are slightly smaller than the original 7.40mm x 7.40mm, reducing PCB footprint without compromising functionality. Actuator height variance of 0.10mm (10.00mm vs. 9.90mm) is negligible for most mechanical clearance applications. Both components utilize identical PC Pin termination for direct board integration.

Operational Considerations: The substitute exhibits higher operating force (160gf vs. 130gf) and reduced switch travel (0.25mm vs. 0.50mm), resulting in a more responsive tactile feedback profile. Mechanical life rating of 300,000 cycles is lower than the original 500,000 cycles; this is acceptable for applications not requiring extended cycle life. Operating temperature range of -40°C ~ 85°C covers most industrial and commercial applications, with a 5°C reduction in upper limit from the original specification.

Environmental Protection: The TL6105DF160QP provides fully sealed construction compared to the original IP60 dust-tight rating, offering enhanced protection against moisture ingress and environmental contamination.

Frequently Asked Questions (FAQ)

Q: Can the TL6105DF160QP be used as a direct replacement for the KSL1A211 without PCB modifications?

A: Yes. Both components share identical circuit configuration (SPST-NO), mounting type (Through Hole), actuator orientation (Top Actuated), and termination style (PC Pin). The outline dimension reduction (7.20mm vs. 7.40mm) and actuator height variance (0.10mm) do not require PCB layout changes for standard applications.

Q: What are the key electrical differences between these components?

A: The primary electrical difference is the contact rating voltage: the substitute TL6105DF160QP is rated for 50VDC compared to the original 32VDC. Current rating remains identical at 0.05A. This voltage increase provides additional design margin and is fully backward-compatible with 32VDC applications.

Q: How do the mechanical characteristics differ?

A: The substitute exhibits higher operating force (160gf vs. 130gf), requiring greater finger pressure for actuation. Switch travel is reduced from 0.50mm to 0.25mm, resulting in a shorter, more responsive tactile stroke. Mechanical life is rated at 300,000 cycles versus the original 500,000 cycles.

Q: Is the TL6105DF160QP suitable for high-temperature applications?

A: The substitute operates across -40°C ~ 85°C, which covers most industrial and commercial temperature ranges. Applications requiring operation above 85°C should be evaluated against specific thermal requirements, as the substitute has a 5°C lower upper temperature limit than the original KSL1A211.

Q: What packaging format is the substitute supplied in?

A: The TL6105DF160QP is supplied in Tube packaging, suitable for automated assembly and manual component handling. The original KSL1A211 packaging format is not specified in the available documentation.

Q: Does the substitute meet current regulatory requirements?

A: Yes. The TL6105DF160QP is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The original KSL1A211 is RoHS non-compliant, making the substitute the appropriate choice for designs requiring regulatory compliance.

Q: Are there any application limitations when using the TL6105DF160QP?

A: Applications requiring mechanical life exceeding 300,000 cycles should evaluate the reduced cycle rating of the substitute. Applications operating continuously above 85°C should verify thermal compatibility. The increased operating force (160gf) may require user interface adjustments in applications with sensitive actuation requirements.