Long-term practice at home and abroad has proved that about 70% of the faults occur on the contacts, which shows that the correct selection and use of relay contacts is very important.
● The combination should use products equal to or more than the required number of contacts.
● The load capacity of most automotive relays is only nominal resistive load, but the actual use of automotive relays is often not resistive load, but inductive load, lamp load, motor load, due to the presence of high inrush current contacts The steady-state load should be derated according to the magnitude of the inrush current.
● Contact material Contact material should conform to the type of load used, and special requirements should be made for low level or medium current.