KSA1M331LFT Equivalent & Substitute Parts

Part Overview

The KSA1M331LFT is a tactile switch manufactured by C&K, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.01A at 32VDC. This through-hole mounted switch features top actuation, a 4.70mm actuator height, and an operating force of 130gf. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

KSA1M331LFT

C&KIn Stock: 5519KSA1M331LFT Datasheet

Current PartRFQ

KSA1M331 LFTR

C&KIn Stock: 10546KSA1M331 LFTR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KSA1M331LFT is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: SPST-NO topology must be maintained
• Contact Rating: 0.01A @ 32VDC electrical specification
• Mounting Type: Through Hole configuration
• Actuator Height: 4.70mm vertical dimension
• Actuator Orientation: Top Actuated design
• Outline Dimensions: 7.40mm x 7.40mm footprint
• Operating Force: 130gf actuation requirement
• Switch Travel: 0.50mm displacement
• Mechanical Life: 1,000,000 Cycles minimum
• Operating Temperature: -40°C ~ 125°C range
• Ingress Protection: IP60 rating
• Compliance: ROHS3 Compliant, REACH Unaffected

The KSA1M331 LFTR meets all substitution criteria as a direct equivalent within the KSA series.

Parameter Comparison

Engineering Selection Recommendations

The KSA1M331 LFTR is a direct functional equivalent to the KSA1M331LFT. Both parts are manufactured by C&K within the KSA series and maintain identical electrical and mechanical specifications. The primary distinction is product status: the KSA1M331LFT is discontinued, while the KSA1M331 LFTR remains in active production with higher inventory availability (10,440 units versus 5,445 units).

Both parts carry ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current applications. The KSA1M331 LFTR is the recommended selection for new designs and ongoing procurement due to its active status and superior stock position.

Frequently Asked Questions (FAQ)

Q: Can the KSA1M331 LFTR be used as a direct replacement for the KSA1M331LFT?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including circuit configuration, contact rating, mounting type, actuator dimensions, and operating characteristics. No circuit modifications are required.

Q: What is the difference between KSA1M331LFT and KSA1M331 LFTR?

A: The parts are functionally equivalent. The primary difference is product lifecycle status: KSA1M331LFT is discontinued, while KSA1M331 LFTR is actively manufactured and stocked.

Q: Are both parts compatible with the same PCB footprint?

A: Yes. Both parts share identical outline dimensions (7.40mm x 7.40mm), actuator height (4.70mm), and through-hole termination style, ensuring direct PCB compatibility without layout modifications.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both KSA1M331LFT and KSA1M331 LFTR are ROHS3 compliant and REACH unaffected, meeting current regulatory standards.

Q: What is the mechanical life expectancy for these switches?

A: Both parts are rated for 1,000,000 mechanical cycles, providing equivalent durability and reliability for momentary switch applications.