Semiconductors are electronic components extremely sensible to overloads and short-circuit, therefore they cannot be protected with general purpose fuse-links. For this reason there are ultra rapid fuse-links for this specific purpose, with very fast melting characteristics, low let-through energy values (I2t) and adequate selective coordination with protection devices upstream.
Typical application comprise protection of semiconductors (diodes, thyristors, triacs, etc) used in power rectifiers, UPS, converters, motor drives (AC and DC), soft starters, solid state relays, photovoltaic inverters, welding inverters and any application where it i necessary to protect semiconductor devices.
RAPIDPLUS range comprise three sizes with dimensions 10×38, 14×51 and 22×58, with rated currents between 4A and 100A and a rated voltage of 690 V AC. Sizes 14×51 and 22×58 are available also with striker, for use in fuse bases with micro-switch. There are two operating classes aR and gR.
Made of ceramic tube with high withstand to internal pressure and thermal chock, that allow a high breaking capacity in a reduced physical space, as well as a good thermal conductivity. End caps are made of silver plated copper for optimal contact with fuse base. Melting elements are made of pure silver and have a special design to obtain low I2t values and reduced arc voltages, as well as good aging resistance. These fuse-links meet IEC/EN60269-1 and IEC/EN60269-4 standards and RoHS directive 2002/95/EC.
aR Class
Protection against short circuit
Very low I2t values
Rated voltage 690V AC (700V DC L/R = 10 ms)
Rated breaking capacity 100 kA
gR Class
Protection against overload and short circuit
Rated voltage 690V AC (440V DC L/R = 10 ms)
Rated breaking capacity 100 kA