KSA0M431LFT Equivalent & Substitute Parts

Part Overview

The KSA0M431LFT 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 component features top actuation, a 4.70mm actuator height, and an operating force of 300gf. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

KSA0M431LFT

C&KIn Stock: 1001KSA0M431LFT Datasheet

Current PartRFQ

KSA0M431 LFTR

C&KIn Stock: 9805KSA0M431 LFTR Datasheet

DirectRFQ

TL6100AF130QP

E-SwitchIn Stock: 4881TL6100AF130QP Datasheet

SimilarRFQ

TL6100AF160QP

E-SwitchIn Stock: 5975TL6100AF160QP Datasheet

SimilarRFQ

TL6100AF300QP

E-SwitchIn Stock: 5835TL6100AF300QP Datasheet

SimilarRFQ

TL6100BF160QP

E-SwitchIn Stock: 872TL6100BF160QP Datasheet

SimilarRFQ

TL6100BF300RP

E-SwitchIn Stock: 998TL6100BF300RP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the KSA0M431LFT is based on the following critical parameters that must align for functional compatibility:

Primary Compatibility Criteria:

• Circuit configuration: SPST-NO
• Switch function: Off-Mom (Momentary)
• Mounting type: Through Hole
• Actuator orientation: Top Actuated
• Termination style: PC Pin
• RoHS compliance: ROHS3 Compliant

Secondary Compatibility Considerations:

• Actuator height and outline dimensions (mechanical fit on PCB)
• Operating force (user interface feel and actuation requirements)
• Contact rating voltage and current (electrical load capacity)
• Operating temperature range (environmental operating conditions)
• Mechanical life cycles (durability requirements)

Substitute parts are grouped into two categories:

Direct Equivalent: KSA0M431 LFTR maintains identical electrical specifications, mechanical dimensions, and operating characteristics as the main part, differing only in packaging format (Bulk vs. standard packaging).

Similar Alternatives: E-Switch TL6100 series parts (TL6100AF130QP, TL6100AF160QP, TL6100AF300QP, TL6100BF160QP, TL6100BF300RP) share the same circuit configuration, mounting type, actuator orientation, and termination style. These parts differ in contact rating (0.05A @ 12VDC vs. 0.01A @ 32VDC), operating force variants, actuator height (5.20mm for BF series), and mechanical life specifications.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Recommended for Pin-Compatible Applications):

KSA0M431 LFTR is the primary substitute for KSA0M431LFT. Both parts are manufactured by C&K, maintain identical electrical and mechanical specifications, and are ROHS3 compliant. The only difference is packaging format (Bulk vs. standard). This part is currently in active production with significantly higher inventory availability (9780 Pcs vs. 962 Pcs), ensuring supply chain continuity.

Alternative Substitutes (E-Switch TL6100 Series):

E-Switch TL6100 series parts are functionally compatible alternatives when the application can accommodate the following parameter variations:

• Contact rating: 0.05A @ 12VDC (higher current capacity, lower voltage rating compared to 0.01A @ 32VDC)
• Operating temperature range: -40°C ~ 85°C (narrower upper temperature limit compared to 125°C)
• Outline dimensions: 7.20mm x 7.20mm (slightly smaller footprint compared to 7.40mm x 7.40mm)
• Switch travel: 0.50mm (reduced travel compared to 0.60mm)
• Mechanical life: 500,000 to 1,000,000 cycles (extended durability compared to 100,000 cycles)

Operating Force Variants:

TL6100AF130QP (130gf) and TL6100AF160QP (160gf) provide lighter actuation forces compared to the 300gf specification of the main part. TL6100AF300QP and TL6100BF300RP maintain the 300gf operating force.

Actuator Height Consideration:

TL6100BF160QP and TL6100BF300RP feature a 5.20mm actuator height, compared to 4.70mm for the main part and AF series alternatives. This 0.50mm difference may affect PCB clearance and user interface ergonomics.

Frequently Asked Questions (FAQ)

Q: Can KSA0M431 LFTR be used as a direct replacement for KSA0M431LFT?

A: Yes. KSA0M431 LFTR is electrically and mechanically identical to KSA0M431LFT. Both parts share the same circuit configuration (SPST-NO), contact rating (0.01A @ 32VDC), mechanical dimensions (7.40mm x 7.40mm), actuator height (4.70mm), operating force (300gf), and temperature range (-40°C ~ 125°C). The only difference is packaging format. This is the recommended substitute.

Q: What are the key differences between KSA0M431LFT and E-Switch TL6100 series parts?

A: The primary differences are contact rating (0.01A @ 32VDC vs. 0.05A @ 12VDC), operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C), outline dimensions (7.40mm x 7.40mm vs. 7.20mm x 7.20mm), and mechanical life (100,000 cycles vs. 500,000 to 1,000,000 cycles). All parts maintain the same circuit configuration (SPST-NO), switch function (Off-Mom), mounting type (Through Hole), and actuator orientation (Top Actuated).

Q: Which E-Switch TL6100 variant should I select?

A: Selection depends on application requirements. For 300gf operating force matching the original part, choose TL6100AF300QP (4.70mm actuator height, 500,000 cycles) or TL6100BF300RP (5.20mm actuator height, 500,000 cycles). For lighter actuation, TL6100AF130QP (130gf, 1,000,000 cycles) or TL6100AF160QP (160gf, 1,000,000 cycles) are available. Verify that the lower contact rating (0.05A @ 12VDC) and reduced temperature range (-40°C ~ 85°C) are acceptable for your circuit.

Q: Does the 0.20mm difference in outline dimensions (7.40mm vs. 7.20mm) affect PCB layout?

A: The E-Switch TL6100 series has a slightly smaller footprint (7.20mm x 7.20mm vs. 7.40mm x 7.40mm). This difference is typically accommodated in standard PCB designs with through-hole mounting. However, verify that your PCB layout provides adequate clearance and that the smaller footprint does not conflict with adjacent components or trace routing.

Q: What is the impact of the 0.50mm actuator height difference in TL6100BF series?

A: TL6100BF160QP and TL6100BF300RP have a 5.20mm actuator height compared to 4.70mm for the main part and TL6100AF series. This 0.50mm increase may affect PCB clearance under enclosures or overlays and may alter the tactile feel and user interface ergonomics. Verify mechanical clearance in your application before selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. KSA0M431 LFTR and all E-Switch TL6100 series parts listed are ROHS3 compliant, matching the compliance status of the original KSA0M431LFT.

Q: What is the difference between AF and BF designations in the TL6100 series?

A: The AF and BF designations indicate different actuator heights. AF series parts have a 4.70mm actuator height, while BF series parts have a 5.20mm actuator height. Both series share the same circuit configuration, contact rating, and mounting characteristics.