onsemi NIS5420MT1TXG Electronic Fuse, 18 V

The ON Semiconductor NIS5420 effuse is a cost effective, resettable fuse which can greatly enhance the reliability of a hard drive or other circuit from both catastrophic and shutdown failures. It is designed to buffer the load device from excessive input voltage which can damage sensitive circuits.

Integrated power device
Power device thermally protected
No external current shunt required