1. The number in the first part of the model number of the tube indicates the maximum operating current value of the tube, such as: G40, 20N means its maximum operating current is 40A, 20A, respectively. The first half of the number of the tube model indicates the maximum operating current value of the tube, such as: G40××××, 20N×××× means that its maximum operating current is 40A, 20A. The second half of the tube model number indicates the maximum withstand voltage value of the tube, such as: G × × × × 150 × × × ×, × × × N120x × × × respectively, the maximum withstand voltage value of 1.5 kV, 1.2 kV.
3. tube model suffix letter containing "D" means that the tube contains a damping diode. But not labeled "D" is not necessarily no damping diode, so be sure to use a multimeter to test the verification in the maintenance, to avoid undue losses.
An IGBT tube technical parameters, including reverse breakdown voltage (BVceo), collector maximum continuous current (IC), output power, operating frequency and other parameters.