Advantage 1, excellent quarantine, leakage current is very small, suitable for withstand voltage tester, insulation resistance detection, BMS insulation inspection; 2. Fast switching speed and small jitter, suitable for ATE test matrix; 3. Airtight sealing, no oxidation of contacts; extremely long service life under small signal (hundreds of millions of times of no-load); 4, low parasitic capacitance, suitable for high-voltage weak signal acquisition; And 5, compare with a vacuum high-voltage relay, that vacuum high-voltage relay is smaller in size and low in cost. Short board (very important, don't step on the pit) 1, the carrying current is very small! High-power DC load is strictly prohibited. It can not be used to cut off the main circuit of hundreds of amperes of power batteries (vacuum high-voltage DC relay should be used for the main circuit of new energy vehicles, so don't confuse it). 2. The breaking capacity of DC inductive load is weak, and frequent on-off with load is very easy for contact adhesion; 3. The glass tube has general impact resistance and shock resistance; the volume of the ultra-high voltage model is obviously larger; 4. It is not suitable for high-frequency continuous on-off high-power pulse discharge.