Q. What is the relay rating?

A. The relay has a rated voltage of 250V a.c. at 10A or 30V d.c. at 10A for resistive (d.c.) loads. For inductive (a.c.) loads the switching current should be de-rated according to the power factor. The current reduction factor can vary between 1 and 0.35 depending on the type of load. Note that the minimum specified switching current or 'wetting current' is 10mA. It is actually possible to switch 110V d.c. but the switching current must not exceed 0.5A for resistive (d.c.) loads.