1.Iron core of AC contactor would generate eddy current and hysteresis loss,but the DC contactor does not loss core. Therefore, aminated silicon steel sheetsis is iron core of AC contactor‘s component which is generally presenting E shape, while complete soft steel is the iron core of DC contactor’s component , which is generally presenting U shape.
2.When single-phase alternating current goes through AC contactor, a short circuit ring is appeared on the end of the static core to let electromagnet have no eliminate vibration and noise. However, the DC contactor does not have need of the short circuit ring.
4.AC contactor has a large starting current, its maximum operation frequency is about 600 times an hour, while that of DC contactor can be 1200 times an hour.
3.AC contactor uses a grid arc extinguishing equipment while the DC contactor uses a magnetic quenching arc extinguishing equipment