1. SiC/MOSFET, high voltage diode, high voltage thin film capacitor, wafer probe withstand voltage breakdown, reverse leakage current, aging stress test; 2. Multi-channel high-voltage matrix: a large number of high-voltage reed relay arrays set up multi-channel scanning switches, and the low voltage control of the single chip microcomputer applies high voltage to different stations in turn; millisecond switching and contactless bouncing ensure the sorting accuracy of the high-speed assembly line; 3. High-end models can use 10 kV ~ 20 kV ultra-high withstand voltage models. The maximum withstand voltage of coil and contact quarantine is 25 kV, which can completely prevent high voltage from entering the main control board and burning the industrial control circuit.