Switching electrical energy has always been one of the most important functions in electrical engineering. “Light on - light off”; ‘Machine on - machine off’. With alternating current - thanks to the zero crossing - this was also easy to manage with mechanical switches. With direct current, however, a problem arises due to the principle: the arc.
An electric arc occurs when two current-carrying contacts are separated - i.e. when switching. This creates a spark which ignites the surrounding gas mixture and transforms it into a conductive, ionized plasma. With alternating current, this arc extinguishes after a very short time due to the zero crossing. Not so with direct current: here the arc remains. Such arcs only occur above a certain voltage and current. However, this makes them high-energy and can lead to serious injuries.
The trend today is moving ever faster towards mobile applications of electrical energy. In the low-power sector, we are all familiar with this from smartphones and the like. However, the automotive and aviation sectors as well as smaller ships also work almost exclusively with direct current.
In addition, electricity is also being generated directly as direct current to an ever greater extent. Photovoltaics are particularly worth mentioning here. So why convert the direct current into alternating current with losses (inverters), transport it and then convert it back into direct current with losses (rectifiers)?
For some time now, SCHURTER has been increasingly focusing on solutions for the direct use of direct current. These include the world's first 400 VDC plug-in connection systems for data centers.
The Electronic Direct Current Switch (EDC) is a new product that is about to go into series production. This is an electro-mechanical microswitch that has been developed specifically for switching high direct currents. The EDC is currently the only one of its kind. Super-compact and lightweight. It switches up to 10 A at 48 VDC. The occurrence of electric arcs is prevented by the special design and the use of state-of-the-art electronic components (semiconductors). As a result, the electronic DC pushbutton has a significantly longer service life (more than 1 million switching cycles) and is more reliable than any comparable electromechanical alternative.
Have a look at the provisional datasheet and request a free working sample with the link below.