1. The contact capacity of the Electromagnetic relay generally does not exceed 5A, the contact capacity of the small Electromagnetic relay is generally only 1A or 2A, and the minimum contact capacity of the contactor is 10A to 20A;

2. The coil of the Electromagnetic relay is divided into DC and AC, while the coil of the contactor is only AC;

3. The contacts of the contactor usually have three main contacts and several auxiliary contacts, while the contacts of the Electromagnetic relay generally do not distinguish between main and auxiliary;

4. The contacts of the Electromagnetic relay are sometimes set in pairs, that is, the normally open contact and the normally closed contact are combined together, while the main contacts of the Electromagnetic relay are generally normally open contacts and will not be set in pairs;

5. According to specific requirements, the Electromagnetic relay will be combined with other devices to design time Electromagnetic relay and pressure Electromagnetic relay, etc., which have additional functions, while contactors generally do not have additional functions.