Lightning-protection anti-interference filter
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The utility model discloses a lightning-protection anti-interference filter comprising a lightning-protection module and a filter module that are respectively connected in power supply line between an alternating current network and electronic equipment, wherein the lightning-protection module is connected with one side of the alternating current network; the filter module is connected with one side of the electronic equipment; the lightning-protection module comprises three piezoresistances, an overload protector L01 connected in series on a fire wire, as well as a temperature fuse L02 and a resistor R0 connected in series with each other; after connected in series with each other, the temperature fuse L02 and the resistor R0 are connected in parallel between the fire wire and a zero wire; the input terminal of the temperature fuse L02 is connected with an output terminal of the overload protector L01 and the output terminal of the overload protector L01 is connected with the zero wire after going through the resistor R0; and the filter module is a power supply filter which is connected between the fire wire and the zero wire. The lightning-protection anti-interference filter has reasonable design, convenient wiring and good use effect, does not play roles in the situation that the power supply line of the electronic equipment works normally and does not generate any bad effects on the power supply line of the electronic equipment, and can effectively play roles in flow discharging and voltage limitation when the thunder invading wave comes.