MEC Switches 3FTL640 Equivalent & Substitute Parts

Part Overview

The MEC Switches 3FTL640 is a tactile switch with SPST-NO circuit configuration, rated for 0.05A at 24VDC. This illuminated switch features a top-actuated plunger design with yellow LED illumination and is housed in a 10.10mm x 10.10mm outline. The 3FTL640 is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

3FTL640

MEC SwitchesIn Stock: 11863FTL640 Datasheet

Current PartRFQ

3FTH940

MEC SwitchesIn Stock: 11433FTH940 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3FTL640 can be substituted with the 3FTH940 based on the following critical parameters that remain constant across both parts:

• Circuit configuration: SPST-NO
• Contact rating: 0.05A @ 24VDC
• Actuator type: Plunger for Cap
• Mounting type: Through Hole
• Actuator height: 10.40mm
• Actuator orientation: Top Actuated
• Outline dimensions: 10.10mm x 10.10mm
• Illumination type and color: LED, Yellow
• Illumination voltage: 2.1 VDC
• Operating force: 300gf
• Ingress protection: IP67
• Actuator material: Polybutylene Terephthalate (PBT)
• Switch travel: 1.00mm
• Mechanical life: 10,000,000 Cycles
• Termination style: PC Pin
• RoHS compliance: ROHS3 Compliant
• MSL rating: 1 (Unlimited)
• REACH status: REACH Unaffected

The primary difference is the extended operating temperature range of the 3FTH940 (-40°C ~ 160°C versus -40°C ~ 115°C) and its active product status, making it a direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The 3FTH940 is the direct substitute for the obsolete 3FTL640. Both parts maintain identical electrical and mechanical specifications, including contact rating, circuit configuration, actuator geometry, and illumination characteristics. The 3FTH940 offers an extended operating temperature range (-40°C ~ 160°C) compared to the 3FTL640 (-40°C ~ 115°C), providing enhanced thermal performance for applications requiring higher temperature operation. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The 3FTH940's active product status ensures long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 3FTH940 be used as a direct replacement for the 3FTL640?

A: Yes. The 3FTH940 is a direct substitute. Both parts share identical circuit configuration (SPST-NO), contact rating (0.05A @ 24VDC), mechanical dimensions, actuator specifications, and illumination characteristics. No circuit modifications are required.

Q: What is the key difference between these two parts?

A: The primary difference is the operating temperature range. The 3FTL640 operates from -40°C to 115°C, while the 3FTH940 extends to 160°C. Additionally, the 3FTH940 is an active product, whereas the 3FTL640 is obsolete.

Q: Are the physical dimensions identical?

A: Yes. Both parts have identical outline dimensions (10.10mm x 10.10mm), actuator height (10.40mm), and mounting type (Through Hole). PCB layout compatibility is maintained.

Q: Do both parts have the same illumination specifications?

A: Yes. Both parts feature yellow LED illumination with a nominal voltage of 2.1 VDC and identical light output characteristics.

Q: What is the packaging difference?

A: The 3FTL640 is packaged in standard format, while the 3FTH940 is supplied in bulk packaging. This does not affect component functionality or performance.

Q: Are compliance certifications identical?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8536.50.9031).