E-Switch – Small surface-mount switches offer long operating lifetime

The TL3780 from E-Switch is a series of extremely small surface-mount tact switches which have a footprint of just 2.0mm 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 3.0mm 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
  • Dielectric strength for 1 minute:
    - 250V AC: TL3780/TL3750
    - 100V AC: TL3700
  • Travel:
    - 0.13mm: TL3780/TL3750
    - 0.15mm: TL3700
  • Operating-temperature range:
    -40°C to 85°C


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