In the domain of electrical engineering, power controllers act as the unsung heroes, silently managing the flow of electrical power. Imagine a dimmer switch on steroids. These devices regulate the amount of power delivered to a load (an electrical device) by adjusting the voltage or current. Power controllers come in various forms, each with its strengths for specific applications.
The Electromechanical Relays or EMRs are explained here https://www.semiconductorsindia.com/products/relays
The other Power Controllers are explained as below: