1. Ceramic brazing sealing technology ensures that the contacts are sealed inside the sealed chamber, preventing the leakage of electric arcs and ensuring the product has good safety. 2. Using hydrogen as a protective gas, it effectively prevents contact oxidation and burning, with low and stable contact resistance. The contact part can meet the IP67 protection level. 3. Capable of carrying current for a long time at 40A and 85 ℃. 4. The insulation resistance reaches 1000M Ω (1000VDC), and the withstand voltage between the contact and the coil is 4kV, which meets the requirements of IEC 60664-1.