... supply for CCTV SystemSTD-4012T-50-4Security box-type power adapter(1)Input Voltage:AC 100-246V (2)Input Voltage: ... the circuit,when condition removed, PTC fuse will automatically back to close. High Voltage Protection:when high voltage occurs, the ... -protection status, when condition removed, then switch back to normal.(8)Application: CCTV Camera, PTZ, IR Illuminators, Video Process Equipment, ...