There are many types of coils used in 4-pin relays, with or without outsourcing. The coils should be placed in separate pieces in special appliances. If they are collided and connected, it will cause disconnection when they are separated. When the electromagnetic system is riveted, the pressure adjustment of the lever press and the press should be moderate. If the pressure is too small, the winding will become loose and the magnetic loss will increase. Multi-winding coils are generally made of lead wires of different colors. When welding, you should pay attention to distinguish, otherwise the coil will be welded wrong. Coils with start and end requirements are generally used as markers to indicate the start and end. Care should be taken when assembling and soldering, otherwise the level of the 4-pin relay will be reversed.

Glass insulators are made of metal pins and glass sintered. During inspection, assembly, adjustment, transportation, and cleaning, the pins are easily bent, and the glass insulators fall off and crack, resulting in air leakage and reduced insulation and withstand voltage performance. The rolling of the pins will also cause the contact reed to shift, which affects the reliable on-off of the product. This requires the operator of the assembly to handle the 4-pin relay with care, and the parts should be neatly arranged in the transfer box. When assembling or adjusting, it is not allowed to pull or twist the lead-out pin.