Ultra-rapid fuses: when every tenth of a second counts

Power semiconductors: Without the high-tech developments in the field of converters, thyristors or UPS, today's energy supply would be unthinkable. As important as these devices are, they are also highly sensitive to short-circuit currents.

It is therefore reassuring to know that SIBA makes fuses that work so fast they are able to protect these semiconductors and so keep them working for very much longer. The name of this product range is "Ultra-rapid". They separate your investment from the power supply quickly and reliably. And we have designed them in such a way that even after a long time in service under constantly changing operating loads, they still maintain their condition. For we know that every tenth of a second counts if your semiconductor is to be kept safe from harm ...

Click here to see a full list with product data of our semiconductor protection fuses


Photovoltaic: Protection for small domestic equipment as well as for big solar farms


From small-scale house installations to large-scale solar power plants, from bungalow rooftops in Germany to American supermarkets, from sports arenas in Asia all the way to self-sufficient systems in rural India. It is a current trend that especially mid-scale PV plants increasingly are using string inverters with rated voltages of 800 V AC and higher. To meet these requirements SIBA has expanded its portfolio.

Read more about our 800 V AC portfolio for string inverters.

Click here for further details about fuses for solar plants.

Battery systems and energy storage:
ideal protection

There will soon be a new standard to address the much stricter requirements that fuses for energy storage and battery systems will be expected to satisfy. SIBA already has a number of products that meet this standard in its portfolio. In addition to its well-known back-up fuses that exclusively provide short-circuit protection, SIBA now also has a new family of full-range fuse inserts that respond to overload currents as well. Both product ranges have rated breaking capacities in excess of 100 kA and so can meet the tough requirements of modern-day battery systems.

Click here for more Details about fuses for energy storage.

Not just frequency converters firmly
under control

©fotolia/Nataliya Hora
©fotolia/Nataliya Hora

Frequency converters used in motor control allow variable speeds, constant torques and gentle starts. A high-quality solution, therefore. And so all the more important to ensure that such investments are properly protected. Our URDC fuses keep your frequency converters safe from harm. And not just them: UPS, power converters and special applications in the field of wind and solar energy are some of the other areas in which these fuses are used.

Power semiconductors:
fast reaction needed


Super-fast tripping times on the one hand, but on the other, the ability to handle even large currents safely. Readily available standard products with many connection options on the one hand, but on the other, special designs that we can develop on request to meet your particular applications. Our Ultra-rapid products are designed for realworld needs – and to give you the peace of mind that your equipment is well protected.

Other applications: At home in
many operating classes


Our UR fuses cover the whole range of uses for power semiconductors, starting from classical short-circuit fuses mounted directly on the semiconductor with the back-up operating class, aR, and extending to the full-range operating class gR, which is also able to protect against overload currents, and also to operating class gS, originally introduced by SIBA as operating class gRL. This product protects not only the semiconductor itself, but also the leads. And in doing so, it preserves your investment from harm.

Any questions?