KSL1M511LFT Equivalent & Substitute Parts

Part Overview

The KSL1M511LFT 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 through-hole mounted component features top actuation, a 9.90mm actuator height, and is designed for applications requiring momentary switching functionality. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The KSL series provides reliable switching performance with 100,000 mechanical life cycles and IP60 ingress protection.

Substiute Parts

KSL1M511LFT

C&KIn Stock: 949KSL1M511LFT Datasheet

Current PartRFQ

KSL1M511 LFTR

C&KIn Stock: 762KSL1M511 LFTR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KSL1M511LFT is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Must be SPST-NO
• Contact Rating: Must be 0.05A @ 32VDC
• Switch Function: Must be Off-Mom (Momentary)
• Mounting Type: Must be Through Hole
• Outline Dimensions: Must be 7.40mm x 7.40mm
• Operating Force: Must be 500gf
• Switch Travel: Must be 0.70mm
• Mechanical Life: Must be 100,000 Cycles
• Ingress Protection: Must be IP60 - Dust Tight
• Termination Style: Must be PC Pin
• Series: Must be KSL

The substitute part KSL1M511 LFTR meets all mandatory electrical and mechanical parameters. Variations in actuator height and maximum operating temperature are within acceptable tolerance ranges for equivalent substitution and do not affect core switching functionality or electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The KSL1M511 LFTR is a direct functional equivalent to the discontinued KSL1M511LFT. Both parts maintain identical electrical specifications, mechanical characteristics, and compliance certifications. The substitute part is currently in active production status with 672 units available in inventory, ensuring supply chain continuity.

The KSL1M511 LFTR features a reduced actuator height of 4.70mm compared to the original 9.90mm. This dimensional difference must be evaluated against specific PCB layout and mechanical assembly requirements. The substitute part operates within a maximum temperature range of -40°C to 85°C, compared to the original -40°C to 90°C. This 5°C reduction in upper operating temperature should be assessed against application thermal requirements.

Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99, maintaining identical regulatory and compliance status. The substitute part is available in bulk packaging, whereas the original part was supplied in standard packaging.

Frequently Asked Questions (FAQ)

Q: Can KSL1M511 LFTR be used as a direct replacement for KSL1M511LFT?

A: Yes, the KSL1M511 LFTR is functionally equivalent across all critical electrical and mechanical parameters. Both parts share identical circuit configuration (SPST-NO), contact rating (0.05A @ 32VDC), operating force (500gf), switch travel (0.70mm), and mechanical life (100,000 cycles). The substitute part is currently in active production.

Q: What are the differences between these two parts?

A: The primary differences are actuator height (9.90mm vs. 4.70mm) and maximum operating temperature (90°C vs. 85°C). The substitute part also differs in packaging format (bulk vs. standard). These variations do not affect core switching functionality or electrical performance.

Q: Does the reduced actuator height affect PCB compatibility?

A: The 5.20mm reduction in actuator height may impact mechanical clearance and user interface ergonomics depending on the specific application design. PCB footprint compatibility remains unchanged due to identical outline dimensions (7.40mm x 7.40mm) and through-hole termination.

Q: Are both parts RoHS compliant?

A: Yes, both KSL1M511LFT and KSL1M511 LFTR are ROHS3 compliant with MSL rating of 1 (Unlimited). Both parts are REACH unaffected and classified under ECCN EAR99.

Q: What is the temperature operating range difference?

A: The original part operates from -40°C to 90°C, while the substitute operates from -40°C to 85°C. Applications requiring operation above 85°C must evaluate this specification against thermal requirements.

Q: Is the substitute part currently available?

A: Yes, the KSL1M511 LFTR is in active production status with 672 units available in inventory, providing reliable supply chain availability compared to the discontinued original part.