2061 & 2063 High-Current 2-Electrode GDTs Bourns 2061 and 2063 High-Current 2-Electrode Gas Discharge Tubes (GDTs) are designed for industrial and telecommunication applications requiring high current handling capabilities. The 2-electrode GDT devices are offered with DC breakdown voltages ranging from 230V to 800V max. and surge ratings from 60kA to 100kA. Bourns 2061 and 2063 High-Current 2-Electrode GDTs are available in the core package.