A miniature relay is a small-sized electromechanical switch that uses an electromagnetic coil to open or close contacts in a circuit. It operates by energizing the coil, which generates a magnetic field that moves an armature and changes the state of the contacts. The primary advantage of a miniature relay is that it allows a small control signal, often at a low voltage and current, to control a much larger and more powerful load. This makes them ideal for applications where space is limited but functionality needs to remain robust.

    The term "miniature" refers to the compact size of the relay. These relays are typically much smaller than standard relays, making them perfect for embedded systems, consumer electronics, and other applications where space constraints are a concern.