Chip Fuse Protects Against Overcurrent and Excessive Ambient Temperatures

SCHURTER’s new USN 1206 is designed to meet the ever-increasing challenges associated with packing density in power electronics. The new chip fuse offers temperature sensitivity suitable for both overcurrent protection and protection against excessive ambient temperatures. 

The USN 1206 is not a pure thermal fuse. It requires a current flow to blow, thus providing protection against overcurrent, just as well as any conventional fuse. In addition, it is designed to protect power semiconductors in automotive applications against over-temperature. The fuse has a current-time characteristic that shifts as a function of the ambient temperature. As a result, a specific trigger at a certain threshold value can be achieved with increasing temperature. The 12A current rated USN 1206 has high I2t values at 32VDC and a slow blowing characteristic. It has a breaking capacity of 80A at 32VDC and 170A at 16VDC, with an operating temperature range of -40°C to +125°C.

The new SCHURTER USN 1206 meets the AEC-Q200 standard, making it suitable for automotive applications requiring the highest reliability under particularly difficult conditions (heat, vibration, mechanical and cyclic strength).   


SCHURTER are sponsors of the Electric & Hybrid Vehicle Technology Expo.