1812L075ZR

PTC Resettable Fuses

PTC resettable fuses, also known as polyfuses, are electrical devices used to protect against short circuits and excessive current in industrial and consumer devices. A PTC resettable fuse consists of a polymer material embedded with carbon particles that provides current-limiting capabilities, and is designed to automatically sense the current flowing through an electrical circuit and open the circuit when the current exceeds a certain level (called the trip point).

The 1812L075ZR is a PTC resettable fuse specifically designed for high-capacity power applications. It has an indirect operating temperature range of -40 to +125 °C, and a maximum current rating of 75A. It is rated for a range of input voltages up to 20 V and can provide over current protection up to a maximum voltage of 33 V DC. This makes the 1812L075ZR ideal for high-capacity power applications, such as battery chargers, power converters, and high-power controllers.

The working principle of the 1812L075ZR is simple—when the device senses that the current flowing through it exceeds the trip point (the level at which the device will open the circuit), the device will open the circuit, shutting off the power supply. The device will remain in this state, effectively protecting the device, until the current is reduced and the temperature reaches the reset point. At that point, the device will reset itself and the circuit is re-energized.

As a PTC resettable fuse, the 1812L075ZR provides a number of advantages over traditional fuses. It is self-resetting, meaning that the fuse does not need to be replaced after each over-current event. It also has a low resistance in normal operation, thereby reducing the power dissipation. The working principle is simple and reliable, providing effective protection against over-current events.

The 1812L075ZR is a versatile and reliable PTC resettable fuse, ideal for use in high-capacity power applications. It provides simple and effective protection against short circuits and over-current events, saving time and money when these events occur. With its high current rating, wide temperature range, and low resistance, the 1812L075ZR is a must-have component for any high-capacity power application.