E-Switch – Small Surface Mount Switches Offer Long Operating Lifetime


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The TL3780 from E-Switch is a series of extremely small surface mount tact switches which have a footprint of just 2.0 x 3.0mm and a very low profile of 0.60mm. These switches are ideal for applications in which space is at a premium, and in which long operating life is an important requirement.

E-Switch offers the TL3780 series in versions with a choice of two actuating-force options: 240 grammes-force (gf) and 330gf. All TL3780 switches have a single-pole, single-throw contact configuration.

The switches have a lifecycle rating of 300,000 for the 300gf switches, and 500,000 actuations for the 240gf parts. Their maximum current rating is 20mA at 15V DC.

The TL3700 series of surface mount switches from E-Switch has similar features to the TL3780, but offers lower actuating-force options of 160gf and 100gf. The TL3700 switches are also slightly larger, measuring 3.0 x 2.6mm.

And the TL3750 series matches the 300,000 cycle lifetime of the TL3780, while offering a higher 50mA current rating than the TL3780 series.


  • 500mΩ maximum initial contact resistance
  • 50mΩ insulation resistance at 100V DC
  • 250V AC dielectric strength for 1 minute (TL3700: 100V AC)
  • Operating temperature range: -40°C to +85°C
  • 0.13mm travel (TL3700: 0.15mm)


  • Wearable devices
  • Medical equipment
  • Audio/visual equipment
  • Portable electronic devices