Automotive relays refer to relays specially used for electrical control in the automotive industry. It is one of the most widely used automotive electronic components in automotive products after sensors. Relays for automobiles can be simply divided into relays for PCB boards and relays for fuse boxes.
The contacts of the electromagnetic relay are divided into normally open contacts and normally closed contacts according to the function of the circuit. Static contacts are called normally closed contacts (NC).
A certain voltage or current is applied to both ends of the electromagnetic relay coil, and the magnetic flux generated by the coil passes through the magnetic circuit composed of the iron core, the yoke, the armature and the working air gap of the magnetic circuit. Under the action of the magnetic field, the armature is attracted to the pole face of the iron core, thereby Push the normally closed contact to disconnect and the normally open contact to close; when the voltage or current across the coil is less than a certain value, and the mechanical reaction force is greater than the electromagnetic attraction force, the armature returns to the initial state, the normally open contact is disconnected, and the normally closed contact Click to connect.