•  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).

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•  There are three electrodes: source, gate, and drain electrodes.

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•  The resistance between terminals B and A (between drain and source) changes according to the voltage (gate voltage) applied to terminal E (gate).

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•  When the gate voltage increases, the resistance between terminals B and A decreases, allowing the current to flow easily.