Calculate the current size
Device current.Coefficient = selection current
Selection current X coefficient = equipment current
(Coefficient: The resistive load is 2 times, and the inductive load is 6 times.)
Resistive loads: electric heating, incandescent lamps, electricity….etc.
Inductive load: motor, transformer, capacitor, solenoid valve, air conditioner, with inductance
Example 1: A heater with a rated current of 15A, and the heater is a resistive load, then the formula: 15AX2=30A, you must choose to purchase a 40A solid state relay.
Example 2:-A motor with a rated current of 15A, and the motor is an inductive load, then the formula: 15AX 6=90A, you must choose to purchase a 100A solid state relay.