15ST120SU

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PTC resettable fuses are electrical protection devices that provide current limiting and overcurrent protection. They are often used to protect sensitive electronic components from harm caused by inrush currents, thermal runaway, and other electrical transients. The 15ST120SU is a very popular type of PTC resettable fuse, as it offers superior current limiting and overcurrent protection in a compact package. It is also very cost-effective, making it a great value for many applications.

The 15ST120SU PTC resettable fuse is designed to protect sensitive electronic components from short-circuit and overcurrent conditions. When a device connected to the 15ST120SU exceeds the fuse’s rated current value, the fuse will automatically trip and disconnect the device from the power source, effectively providing overcurrent protection. After the short circuit or overload condition has been removed, the 15ST120SU can be manually reset and the device is ready to be powered again. This resetting feature allows the fuse to be reused, eliminating the cost and hassle of replacing the fuse after each use.

The 15ST120SU PTC resettable fuse has many applications, depending on the application’s requirements. It is commonly used to overcurrent protect automotive electronics and electric motor drivers. It can also be used to protect household and industrial electronics, such as cell phone chargers, power strips, surge protectors, LEDs, and other consumer electronics. Additionally, the PTC resettable fuse is used in various medical applications, such as medical equipment and patient monitoring systems. The 15ST120SU is also used in many power supplies and UPS systems, as its small form factor and cost-effectiveness make it ideal for these applications.

The working principle of the 15ST120SU PTC resettable fuse is quite simple. The device consists of two parts: a positive temperature coefficient (PTC) polymer and a metal fuse element. When the current running through the circuit exceeds the fuse’s rated value, the internal PTC polymer heats up, causing the metal fuse element to melt and open the circuit, thus preventing further current flow and protecting the device connected to it. Once the fault current has been removed, the polymer cools down and the metal fuse element reforms, resetting the circuit and allowing power to flow until the next fault.

Thanks to its small size, cost-efficiency, and easy resetting function, the 15ST120SU is a great choice for many power applications. It provides effective current limiting and overcurrent protection, making it a valuable component in many designs. With its wide range of applications, the 15ST120SU PTC resettable fuse is an essential component for protecting electronic devices from over-current and short-circuit conditions.

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