They are a cast aluminum or iron box that can withstand a heavy-duty explosion from gas entering the box and igniting, and then containing the explosion. Dust Explosion-proof Power Distribution Panel MAMX-20 *In—built circuit breaker, AC Contactor, Thermorelay, PLC, Transducer, Soft starter and other components, The panel can install indicator, Pushbutton, Universal switch, Display instrument. *Maximum current: <630A *Used in industrial environment. It is widely used in flammable and explosive gas environment such as oil exploitation, refining, chemical industry, offshore oil platform, oil tanker, etc. You will benefit from a highly flexible solution tailored precisely to your application.