This series of vacuum contactors are suitable for AC 50-60HZ, the rated voltage of the main circuit is below 1.6KV, and the rated current is from 160A, 250A, 400A, 630A, 800A, 1000A1250A power network system, for long-distance connection and breaking and frequent start and control of AC motors, transformers and capacitor banks and other occasions have permanent magnet mechanism and electric maintenance two, fully enclosed design, beautiful and generous, cost-effective, and CJ20 installation size interchangeability consistency is good, simple control, more stable and reliable performance, maintenance-free service life is long, cost-effective, is the most ideal replacement product for old-fashioned AC contactors. This series of products also has permanent magnet vacuum contactor, after the product is closed, the mechanical secondary control zero power consumption, more energy-saving power is an excellent energy-saving control switch, which can be used for infrequent action and the occasion that the closing machinery is in a state of maintenance.