Alt / Mom - this means that this switch uses a combination of momentary and alternate action. When you press and hold the air transmitter or air button this will close both the mom. and the alt. switch inside. This then completes the electrical circuit to allow the pump to run and pressurise the pressure switch (TBS132) or Vacuum Switch (VTBS3002). Once the pr. switch is closed you can release the air button. This action can be stopped by either pressing the air button again causing the alternate switch to open or if the pressure drops on the pump this will open the pressure switch contact.

Double Pole, Single Throw...
This means this is a double line conductor with a simple on/off configuration for both poles. 2 flat spade conductors are used to connect the circuit on each side. This switch is an alternate action meaning it will hold in the on position and then hold in the off position when actuated.

Height: 57mm
Width: 25mm (at widest point)
Depth: 50mm (from front to rear spade)