The SPDT Contactor is a series of DC Contactor with contact arrangement of single pole double throw, namely one changeover relay. It is widely used in electrical control systems, such as communication power supply equipment, frequency converters, engineering machinery, electromobiles, electric forklifts, automobiles, trains, ships, uninterruptible power supplies, etc. Single pole double throw contactor is developed for both interrupted and uninterrupted loads, and suitable for switching resistive, capacitive and inductive loads. Due to the diversity of product structures, different installation requirements can be met.