Printed Circuit Board (PCB) electromagnetic relays are indispensable components in the realm of electrical and electronic systems, enabling efficient control of high-power devices while maintaining the safety and integrity of low-power control circuits. The versatility and reliability of these relays have made them a staple in countless applications, ranging from industrial automation to consumer electronics. In this article, we will explore the working principle, key features, applications, and benefits of PCB electromagnetic relays.
Working Principle of PCB Electromagnetic Relays At its core, a PCB electromagnetic relay is an electromechanical switch that uses an electromagnetic coil to control the opening or closing of electrical contacts. The relay consists of a coil, an armature (a movable iron piece), a set of contacts, and a spring mechanism. When an electric current is applied to the coil, it generates a magnetic field that attracts the armature. This movement causes the contacts to change their position, either closing a circuit (NO—normally open) or opening a circuit (NC—normally closed). The armature’s return to its original position is facilitated by a spring, ensuring that the contacts return to their default state when the coil is no longer energized.
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