![]() Installing a fastĪcting fuse in place of a semiconductor fuse can result in damage to your equipment and is Reaction time is not quick enough to protect sensitive semicondutor components. Difference between a fast acting fuse and a semiconductor fuse?Ī fast acting fuse protects equipment and wiring by reacting to short circuits quickly, but the These fuses offer enhanced protection, safety and reliability, along with reduced risk of replacement errors and assembly costs. Start protecting your new equipment with gS class fuses and gR class fuses today. The protection of power electronics equipment. The gR class fuse represents considerably improved performance in semiconductor protection.gR class fuses should be used in the design of low voltage equipment and in The primary timecurrentĬharacteristic of aR class fuses is the CC'curve, above which another protection device must be associated. Differences between aR Class and gR / gS Class FusesĪR class fuses feature a high minimum interrupting current as compared with their current rating. This also results in gS class fuses having lower fuse body temperatures. ![]() They both provide full-range breaking capacity (overloadĪnd short-circuit protection) but gS class fuses have lower power dissipation than gR class fuses due to ![]() GS class fuses are very similar to gR class fuses. Designers can often substitute a gR class fuse for an aR class fuse. GR class fuses provide full-range breaking capacity (overload and short-circuit protection) for the protection of semiconductors, cables and all switchgear of the installation. Note: aR fuses are often faster (with a lower I²t value) than a comparable gS or gR fuse.Īn aR class fuse must not be used as a replacement for a gR class fuse. Typical applications for semiconductor fuses include 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 is necessary to protect semiconductor devices.ĪR class fuses only provide partial-range breaking capacity (short-circuit protection only) for the protection of power semiconductors (IEC Utilization category). Semiconductor Fuses fall into three classes which characterise the breaking (interrupting) characteristic of the fuse - aR, gR and gS.These fuse speed markings are often printed on the fuse to help you identify it. Semidonductor fuses generally range from 125 to 2,100 volts and are available in a wide variety of shapes and sizes. ![]() by minimizing the I²t, peak current let-through and arc voltage. Also known as ultra-rapid fuses, high speed fuses or rectifier fuses a Semiconductor fuse is a high speed current limiting fuse that is designed to protect and isolate sensitive semiconductor components such as diodes, thyristors, SCRs etc. ![]()
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