As the name suggests, a circuit protection device protects the circuit and helps prevent short circuits, excessively raised temperatures, and current in a conductor. Circuit protection devices have a DIN rail mounting, and are especially useful in sensitive electronics, circuits of several electrical appliances, and power supplies. Other such devices include fuses, relays, RCD, and poly switches. These are also known as circuit breakers. At EE-USA, we stock a variety of brands of such circuit protection devices including Altech. We offer them at the best prices with free shipping. We source them from reliable manufacturers, and hence all of them do come with short circuit withstand UL rating and voltage rating.