Good price and quality 12v 5 pin relay is generally composed of iron core, coil, armature, contact and so on. When working, a certain voltage is applied to both ends of the coil, and current will flow through the coil to produce electromagnetic effect. Under the action of electromagnetic force, the armature overcomes the pull of the anti-spring and attracts to the iron core, thereby driving the armature's moving contact. It is attracted to the static contact. When the coil is de-energized, the electromagnetic attraction will disappear, and the armature will return to its original position under the reaction force of the spring, so that the movable contact is attracted to the original static contact. This kind of pull-in and release action achieves the purpose of (electricity) conduction and disconnection.

Good price and quality 12v 5 pin relay is a relay that turns on or off the circuit according to the current in the coil. The coil of the current relay is connected in series in the circuit. In order not to affect the working condition of the circuit, the current relay attracts fewer coils and thick wires. When the coil current is higher than the setting value, it is called an overcurrent relay, and when the coil current is lower than the setting value, it is called an undercurrent relay.

Good price and quality When the 12v 5 pin relay works normally, the current through the current coil is the rated value, so the electromagnetic force generated is not enough to overcome the reaction elastic force, and the normally closed contact remains closed. When the current through the coil exceeds the setting value, the electromagnetic attraction force is greater than the reaction spring tension, the iron core attracts the armature to open the normally closed contact, and the normally open contact closes. Overcurrent fine relays are mainly used for frequent and heavy-load starting occasions, as short-circuit and overload protection of motors or main circuits. Undercurrent relays are often used for DC motor and magnetic chuck loss-of-excitation protection.