Fuses are used to protect circuits and entire devices from overcurrent.
In a vast majority of cases, single-use circuit fuses are utilized in industrial applications. Their rated currents range anywhere from several dozen milliamps to several thousand amperes. Rated current is a fuse's key parameter. However, in industrial installations rated voltage and breaking capacity (the maximum voltage under which the fuse will still work and protect the circuit) should also be considered. These parameters depend mostly on the fuse's size. Popular sizes of cylindrical industrial fuses are: 8x31 mm, 10,3x38 mm, 14x51 mm, and 22x58 mm. In higher power applications, NH fuses are often used. NH fuses have a different, standardised shape.
When choosing a fuse, their performance characteristics should be considered. They include information about reaction time and intended use. Fast and ultra-fast fuses are an excellent fit for applications in which protected circuits are very sensitive to overcurrent. Time-delay fuses protect installations in which temporary current jumps or voltage jumps can occur.
Industrial fuses available at TME
TME's offer includes fuses from Littelfuse, SIBA, DF Electric, Bussmann, Siemens, Schurter, Weber, Eska, ABB, and Cliff. Cliff fuses are resettable — they do not get permanently damaged upon activation. Some SIBA fuses have an activation indicator which lets you easily check the fuse status. You can find fuses with various performance characteristics at TME: gG (for general use), aM (for engines), aR, gR (for power electronics), gL & gRL (for wires and cables, including power electronics cables), gPV (for photovoltaic installations), gS (combining the features of gG and aR fuses), gTr (for transformers), and universal time-delay, fast & ultra-fast fuses.