The USN 1206 fuse is designed to meet the 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, per se. It requires a current flow to blow, thus providing protection against overcurrent, just as well as any conventional fuse. In addition, it is also designed to protect power semiconductors in automotive applications against over-temperature. The fuse has a current-time characteristic which shifts as a function of the ambient temperature. As a result, a specific trigger at a certain threshold value can happen with rising temperature. The 12-A current-rated USN 1206 has high I2t melting values at 32 Vdc and a slow-blowing characteristic. It has a breaking capacity of 80 A at 32 Vdc and 170 A at 16 Vdc with an operating temperature range of a -40 to a 125°C.
The 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).
Applications include secondary protection dc and ac, automotive electronics, intrinsically safe electronics, battery protection, and many others.
In all electronics with temperature-critical components (eg MOSFETs) Shurter is certified according to IATF 16949.
More information: SCHURTER, Inc., 447 Aviation Blvd., Santa Rosa, CA 95403, (707) 636-3000, www.schurter.com/en
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