A miniature relay is a small, electrically operated switch that uses an electromagnet to open or close the contacts in a circuit. Despite their small size, these relays are designed to manage the switching of relatively high currents, offering reliable performance in a wide range of environments. The compact nature of miniature relays makes them ideal for situations where space is limited, such as in circuit boards, automotive systems, and other small electronic devices.

    Miniature relays consist of several key components: the coil, contacts, and an armature. The coil is energized by a current, which creates a magnetic field that attracts the armature, either opening or closing the contacts depending on the type of relay. These relays can be configured in various forms, such as single-pole single-throw (SPST) or single-pole double-throw (SPDT), depending on the desired functionality.