ITEM NAME:DC-DC 8-32V to 45~390V High Voltage Boost Converter O7M5 Mod Step-up Booste N6B3 Description&Preview.Output Power: 40W (Peak 70W). Over current protection: Yes. Input reverse polarity protection: Yes (non-self-healing, reverse burning fuse, try not reversed.). Short circuit protection: Yes. You can follow below process to chontact us.