TST3425 Small Tactile Switch:

TST3425 is an on/off electronic small tactile switch that is only on when the button is pressed or if there is a definitive change in pressure.
It was used for circuit board, the height for the switch is 2.5mm.
The Tactile Switch applications include: Low power, miniature devices, digital switching, anything where operator feedback is required (a switch confirmation coming from the switch being depressed) will find that the perfect choice is a Tactile switch.

Pls check the datasheet below:

Type: Snap-in Operating force: 180/250/400gf
Operating Direction: Top Push Travel: 0.25mm
Operating Life: Over 100,000 cycles Initial contact resistance: 100mΩ max.
Stem color: Silver Operating Temperature: -30℃~+85℃
Stem height: H=2.5mm Series type: SMD type
Rating (max.): 50mA 12V DC Rating (min.): 10µA 1V DC
SPQ: 1,000pcs Total Length: 4.6mm/5,1mm
TST3425 small tactile switch