• Controls the supply voltage to the blower motor according to the gate voltage sent from the climate control unit and adjusts the rotation speed (airflow volume).
• There are four electrodes: source, gate, drain and feedback electrodes.
• The resistance between terminals C and D (between drain and source) changes according to the voltage (gate voltage) applied to terminal A (gate).
• When the gate voltage increases, the resistance between terminals C and D decreases, allowing the current to flow easily.
