A PCB electromagnetic relay is an electromechanical switch that is mounted directly onto a Printed Circuit Board (PCB). It typically consists of a coil, a movable armature, and one or more contacts. When an electrical current passes through the coil, it generates a magnetic field that attracts or repels the armature, causing the contacts to open or close. This action allows the relay to switch larger currents or voltages with a much smaller control current, making it ideal for controlling high-power devices using low-power signals.

    PCB electromagnetic relays are compact and designed to be soldered onto the PCB, saving space and simplifying the manufacturing process. They are available in a variety of configurations, such as single-pole or double-pole, normally open (NO) or normally closed (NC) contacts, depending on the specific needs of the application.