selection of PTC and MOV for regulator.

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dfordivya
Posts: 1
Joined: Mon Nov 13, 2017 4:07 am

selection of PTC and MOV for regulator.

Post by dfordivya » Mon Nov 13, 2017 4:24 am

I want to Protect the voltage regulator which has a input voltage of 12V+/- 1 and a load current of 200mA for the regulator.The regulator ZLDO1117 has min load current of 2mA to 5mA and a output current capablity of 1A. A ptc fuse in series with the supply and a MOV in parallel is used for protection. How to specify the PTC voltage, holding current and trip current?

Also help in selecting the MOV DC voltage and energy rating.

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