UMT-W Series Surface-Mount Fuses

SCHURTER has launched a pulse-proof surface-mount ceramic fuse with super time-lag tripping characteristics. The UMT-W is particularly suitable as a fail safe device in demanding applications.

The cuboid-shaped (5.3 mm x 16 mm), extremely compact surface-mount fuse is available in five rated currents from 5 A to 20 A and reaches rated voltages of up to 125 V_AC and V_DC with a breaking capacity of up to 1000 A. This circuit protector is super slow and has precisely defined melting characteristics unique for a surface-mount fuse.

The UMT-W is recommended wherever high inrush currents flow (e.g. motor control systems) and particularly suitable for applications with long wires (e.g. avionics), which are often primarily protected by an electronic fuse. If this monitoring fails or does not perform its task correctly, the UMT-W takes over as a fail safe device and transfers the system to a safe, current-less state. Due to the precise melting times, with its precisely defined min/max corridor at 4xIn, robust and selective safety concepts can be implemented on top of the electronic fuse.

The UMT-W fuse is a "COTS+" product. The "+" comes from extended fuse qualification tests (e.g. AEC-Q200) and highly controlled manufacturing processes, which are available to all SCHURTER customers. For higher reliability requirements, a visual inspection according to MIL-PRF 55342 is offered with different types of up-screenings (burn-in) and detailed test reports on request.