Here’s a breakdown of how they work and some important characteristics:

Working Principle: Coil (Electromagnet): When an electrical current flows through the coil, it generates a magnetic field. Armature: The magnetic field pulls an armature, which moves to open or close the relay contacts. Contacts: These are the key switching elements. The armature either brings together or separates these contacts when activated. Spring: A spring returns the armature to its original position when the coil current is turned off, resetting the relay. Types of Electromechanical Relays: SPDT (Single-Pole Double-Throw): One common type with a single input contact and two possible output contacts.