KSL1M411 Equivalent & Substitute Parts

Part Overview

The KSL1M411 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 in PCB applications. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

KSL1M411

C&KIn Stock: 983KSL1M411 Datasheet

Current PartRFQ

TL6105DF300QP

E-SwitchIn Stock: 770TL6105DF300QP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSL1M411 is determined by strict alignment of the following critical parameters:

Circuit & Electrical Compatibility:

• Circuit configuration must be SPST-NO
• Switch function must be Off-Mom (momentary operation)
• Contact rating voltage must equal or exceed 32VDC
• Contact rating current must equal or exceed 0.05A

Mechanical & Physical Compatibility:

• Mounting type must be Through Hole
• Actuator orientation must be Top Actuated
• Termination style must be PC Pin
• Outline dimensions must be compatible with PCB footprint (7.40mm x 7.40mm baseline)
• Actuator height must accommodate existing mechanical clearances

Operational Characteristics:

• Operating force of 300gf is the baseline requirement
• Switch travel tolerance must be compatible with application design
• Mechanical life rating must support intended duty cycle
• Operating temperature range must encompass -40°C ~ 90°C or be compatible with application limits

Environmental & Compliance:

• Ingress protection rating should maintain or exceed IP60
• Grounding pin feature should be present for equivalent functionality
• Moisture sensitivity level MSL 1 is acceptable

The TL6105DF300QP from E-Switch meets these substitution criteria through equivalent circuit configuration, identical switch function, superior voltage rating (50VDC), matching mechanical interface, and compatible operational parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TL6105DF300QP

The TL6105DF300QP is the qualified substitute for the obsolete KSL1M411 based on the following engineering criteria:

Electrical Equivalence: Both components share identical SPST-NO circuit configuration and Off-Mom switch function. The TL6105DF300QP contact rating of 0.05A @ 50VDC exceeds the KSL1M411 requirement of 0.05A @ 32VDC, providing additional voltage margin for circuit protection.

Mechanical Compatibility: Through-hole mounting, top actuation, PC pin termination, and grounding pin features are identical. Outline dimensions (7.20mm x 7.20mm vs. 7.40mm x 7.40mm) are compatible with existing PCB footprints. Actuator height difference of 0.10mm (10.00mm vs. 9.90mm) requires verification of mechanical clearance in the application enclosure.

Operational Characteristics: Operating force of 300gf is identical. Switch travel reduction from 0.60mm to 0.50mm is within typical application tolerance but should be verified for tactile feedback requirements. Mechanical life rating of 50,000 cycles for the TL6105DF300QP is lower than the KSL1M411 (100,000 cycles); this is acceptable for applications with moderate duty cycles but should be assessed for high-frequency switching applications.

Environmental & Compliance: The TL6105DF300QP operates across -40°C ~ 85°C, which is 5°C lower at the upper limit than the KSL1M411. This is acceptable for most industrial and consumer applications. The substitute provides full sealing (sealed - fully) compared to IP60 dust-tight rating, offering enhanced environmental protection. RoHS3 compliance of the TL6105DF300QP meets current regulatory requirements, whereas the KSL1M411 is RoHS non-compliant.

Availability & Production Status: The TL6105DF300QP is in active production with 682 units in stock, ensuring long-term supply continuity compared to the obsolete KSL1M411.

Frequently Asked Questions (FAQ)

Q: Can the TL6105DF300QP directly replace the KSL1M411 without PCB modification?

A: The TL6105DF300QP is mechanically and electrically compatible with the KSL1M411 for most applications. However, verify the following before direct substitution: (1) Mechanical clearance for the 0.10mm taller actuator height (10.00mm vs. 9.90mm), (2) Application tolerance for the 0.10mm reduction in switch travel (0.50mm vs. 0.60mm), and (3) Duty cycle compatibility with the lower mechanical life rating (50,000 vs. 100,000 cycles). No PCB footprint modification is required due to compatible outline dimensions and PC pin termination.

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

A: Both components are SPST-NO momentary switches with identical 0.05A contact current rating. The primary electrical difference is the voltage rating: the TL6105DF300QP is rated for 50VDC compared to the KSL1M411 at 32VDC. This higher voltage rating in the substitute provides additional safety margin and is fully backward-compatible with 32VDC applications.

Q: Does the TL6105DF300QP meet RoHS requirements?

A: Yes. The TL6105DF300QP is ROHS3 compliant, meeting current Restriction of Hazardous Substances regulations. The original KSL1M411 is RoHS non-compliant. If your application or supply chain requires RoHS compliance, the TL6105DF300QP is the appropriate choice.

Q: How do the mechanical life ratings compare, and does this affect component selection?

A: The KSL1M411 is rated for 100,000 mechanical cycles, while the TL6105DF300QP is rated for 50,000 cycles. For applications with moderate switching frequency (typical user-actuated buttons, occasional control inputs), the 50,000-cycle rating is sufficient. For high-frequency switching applications or safety-critical systems requiring extended component life, the lower rating should be evaluated against actual duty cycle requirements.

Q: What is the impact of the 0.10mm difference in switch travel?

A: The KSL1M411 has 0.60mm switch travel compared to 0.50mm for the TL6105DF300QP. This 0.10mm reduction is minor and typically imperceptible to end users. However, if the application design relies on specific tactile feedback characteristics or mechanical stop positioning, this difference should be verified through functional testing or application review.

Q: Are there any environmental or sealing differences?

A: The KSL1M411 provides IP60 dust-tight protection. The TL6105DF300QP offers enhanced sealing with a fully sealed design, providing superior protection against moisture and contaminants. Both components have identical Moisture Sensitivity Level (MSL 1 - Unlimited), indicating no special handling requirements during storage or assembly.

Q: What is the operating temperature range difference, and is it significant?

A: The KSL1M411 operates from -40°C to 90°C, while the TL6105DF300QP operates from -40°C to 85°C. The 5°C difference at the upper temperature limit is acceptable for most industrial, commercial, and consumer applications. If your application requires operation above 85°C, the KSL1M411 specifications would be preferred, though the component is obsolete.