Detailed Answer
Relay load connection principles: 1. small loads (contactor coils/solenoid valves/indicators): drive directly with the relay (within contact rating 5A/250VAC); 2. large loads (motor main circuits): must be controlled indirectly through contactors; 3. inductive loads (coils) need arc suppression/freewheeling protection; 4. keep the load within 80% of the contact rating. LDER LD series contact rating is 5A/250VAC, sufficient for driving mainstream contactors.
| Small loads | Direct drive |
| Large loads | Indirect via contactor |
| Protection | Arc suppression/freewheeling |
Note:Driving a motor directly with a relay will burn the contacts; a contactor is required.