600 V Housingless Welding Diode Housingless Welding Diode 600 V, 8040 A with a diameter of 46 mm. We designed this welding diode with improved losses for medium frequency resistance welding and high current rectifier applications. The low on-state voltage allows very high forward current of around 8040 A continuously which is more than our current type 46DN06.The 46DN06B02 is very compact with a diameter of 46 mm and a height of 4 mm.