MEC Switches 3FTL689 Equivalent & Substitute Parts

Part Overview

The 3FTL689 is a tactile switch from MEC Switches' Multimec® 3 series, configured as a SPST-NO (Single Pole Single Throw - Normally Open) momentary contact switch. It features top actuation, through-hole mounting, and integrated red LED illumination at 2 VDC. The switch is rated for 0.05A at 24VDC with an operating force of 300gf and mechanical life of 10,000,000 cycles.

The 3FTL689 carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this switch configuration.

Substiute Parts

3FTL689

MEC SwitchesIn Stock: 10233FTL689 Datasheet

Current PartRFQ

3FTH987

MEC SwitchesIn Stock: 10673FTH987 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3FTL689 is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPST-NO)
• Switch function (Off-Mom momentary operation)
• Contact rating (0.05A @ 24VDC)
• Actuator type and orientation (Plunger for Cap, Top Actuated)
• Mounting type (Through Hole)
• Actuator height off PCB (10.40mm)
• Outline dimensions (10.10mm x 10.10mm)
• Illumination specification (LED, Red at 2 VDC)
• Operating force (300gf)
• Switch travel (1.00mm)
• Ingress protection rating (IP67)
• Termination style (PC Pin)
• Mechanical life (10,000,000 cycles)

The 3FTH987 meets all these criteria and qualifies as a direct substitute. Differences in operating temperature range and product status do not affect functional interchangeability in applications designed for the 3FTL689.

Parameter Comparison

Engineering Selection Recommendations

The 3FTH987 is the direct substitute for the obsolete 3FTL689. Both parts are ROHS3 compliant, REACH unaffected, and carry identical electrical and mechanical specifications across all functional parameters.

The 3FTH987 offers an extended operating temperature range (-40°C ~ 160°C versus -40°C ~ 115°C), providing additional thermal margin for applications operating at elevated temperatures. The 3FTH987 maintains active product status, ensuring ongoing availability and supply chain support.

For applications where the original 3FTL689 was specified, the 3FTH987 provides direct functional replacement without design modification or PCB rework.

Frequently Asked Questions (FAQ)

Q: Can the 3FTH987 be used as a direct replacement for the 3FTL689 without PCB modifications?

A: Yes. The 3FTH987 is dimensionally and functionally identical to the 3FTL689. Outline dimensions (10.10mm x 10.10mm), actuator height (10.40mm), through-hole mounting, and PC pin termination are identical. No PCB layout changes are required.

Q: What is the difference in operating temperature range between these parts?

A: The 3FTL689 operates from -40°C to 115°C, while the 3FTH987 operates from -40°C to 160°C. The 3FTH987 provides a 45°C higher upper temperature limit. For applications operating within the 3FTL689 range, both parts are equivalent.

Q: Are the electrical specifications identical?

A: Yes. Both parts are rated for 0.05A at 24VDC, feature identical contact ratings, operating force (300gf), switch travel (1.00mm), and mechanical life (10,000,000 cycles). LED illumination specifications are identical: red LED at 2 VDC nominal.

Q: What is the difference in packaging between these parts?

A: The 3FTL689 packaging is listed as "-" (unspecified), while the 3FTH987 is supplied in Tube packaging. Packaging does not affect component functionality or electrical performance.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the 3FTL689 and 3FTH987 are ROHS3 compliant and REACH unaffected. Both carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: Why is the 3FTL689 listed as obsolete?

A: The 3FTL689 carries obsolete product status. The 3FTH987 is the active equivalent from MEC Switches' Multimec® 3 series and is recommended for new designs and ongoing production requirements.