The reliability index and technical level of aerospace electromagnetic relay are extremely high. It has the irreplaceable advantages of high conversion depth, multi-channel synchronous conversion, high sensitivity, fast action, small size, low power consumption, large input-output ratio and strong anti-interference ability, so it is widely used in various fields of weapons and equipment, aerospace and national defense industry. According to incomplete statistics, a new tactical missile in the use of aerospace relays to 900, a synchronous satellite using aerospace relays up to about 1500, a...