KSA1M511LFT Equivalent & Substitute Parts

Part Overview

The KSA1M511LFT 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 4.70mm actuator height, and an operating force of 500gf. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

KSA1M511LFT

C&KIn Stock: 1113KSA1M511LFT Datasheet

Current PartRFQ

KSA1M511 LFTR

C&KIn Stock: 5711KSA1M511 LFTR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KSA1M511LFT 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: Through hole configuration required
• Actuator Height: 4.70mm vertical dimension
• Actuator Orientation: Top actuated design
• Outline Dimensions: 7.40mm x 7.40mm footprint
• Operating Force: 500gf actuation force
• Switch Travel: 0.70mm displacement
• Termination Style: PC pin connection
• Ingress Protection: IP60 rating
• Mechanical Life: 100,000 cycles minimum

The KSA1M511 LFTR meets all substitution criteria as a direct equivalent from the same manufacturer and series, with identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The KSA1M511 LFTR is a direct functional equivalent to the KSA1M511LFT. Both parts are manufactured by C&K within the KSA series and share identical electrical specifications, mechanical dimensions, and performance characteristics. The substitute part is currently in active production status, whereas the original part is discontinued.

The operating temperature range of the substitute extends to 85°C compared to the original 90°C maximum. Applications requiring operation above 85°C should evaluate this specification against system requirements.

Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental consistency. The difference in packaging format (tape and reel versus bulk) does not affect functional compatibility and relates only to procurement and handling logistics.

Frequently Asked Questions (FAQ)

Q: Can KSA1M511 LFTR be used as a direct replacement for KSA1M511LFT?

A: Yes. Both parts are electrically and mechanically equivalent with identical SPST-NO circuit configuration, 0.05A @ 32VDC contact rating, 4.70mm actuator height, 500gf operating force, and 100,000 cycle mechanical life. The substitute is currently available in active production.

Q: What is the difference between the two part numbers?

A: The primary difference is product status. KSA1M511LFT is discontinued at DiGi Electronics, while KSA1M511 LFTR is active. The operating temperature maximum differs by 5°C (90°C versus 85°C). Packaging format also differs: the original uses tape and reel, while the substitute uses bulk packaging.

Q: Are there any electrical performance differences?

A: No. Both parts maintain identical contact ratings of 0.05A @ 32VDC, switch function (Off-Mom), and mechanical specifications including 0.70mm travel distance and IP60 ingress protection.

Q: Does the packaging difference affect PCB assembly compatibility?

A: No. Packaging format affects only procurement and handling. Both parts use identical PC pin termination and 7.40mm x 7.40mm footprints, ensuring PCB assembly compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both KSA1M511LFT and KSA1M511 LFTR are ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What is the maximum operating temperature for each part?

A: KSA1M511LFT operates from -40°C to 90°C. KSA1M511 LFTR operates from -40°C to 85°C. Applications requiring operation above 85°C should use the original part specification if available from alternative sources.