Patent ID: 7639467

Claim:
An over-voltage protection circuit assembly for protecting an electronic circuit from being damaged by over-voltage, the over-voltage protection circuit assembly comprising: a connector comprising a power terminal configured to receive power; and an over-voltage protection circuit comprising: a voltage input terminal configured to connect with the power terminal of the connector; a voltage output terminal configured to connect with the electronic circuit, the voltage output terminal connected to the voltage input terminal via a resistor; a relay comprising an inductance coil and a switch, the inductance coil connected between the voltage input terminal and ground; a warning unit connected in series with the switch of the relay between the voltage input terminal and ground; and a voltage regulating diode connected between the voltage output terminal and ground, the anode of the voltage regulating diode connected to ground, and the cathode of the voltage regulating diode connected to the voltage output terminal; wherein if the voltage input terminal receives a voltage suitable for the electronic circuit, the relay is open, the warning unit does not work, and the voltage output terminal outputs the voltage to the electronic circuit; and if the voltage input terminal receives a voltage greater than the suitable voltage of the electronic circuit, the relay is closed, the warning unit alarms, and the greater voltage is regulated to the suitable voltage by the voltage regulating diode.