In the vast world of electronics, there are numerous components that work together harmoniously to create functional devices. One of the unsung heroes of these components is the PCB electromagnetic relay. This device plays a critical role in switching operations, allowing for the control of high voltage and current circuits with low power input. This article delves into the intricacies of PCB electromagnetic relays, exploring their construction, operation, types, applications, and advantages.
Construction of PCB Electromagnetic Relay A typical PCB electromagnetic relay consists of several key elements： Coil： The coil, or winding, is an essential component that generates a magnetic field when an electrical current passes through it. This magnetic field is responsible for the operation of the relay. Armature： The armature is a movable piece of iron that is influenced by the magnetic field produced by the coil. When energized, the armature moves to either close or open the relay’s contacts. Contacts： The contacts are conductive components that complete or interrupt the circuit. They come in various configurations, such as normally open (NO) or normally closed (NC), depending on the desired operation.