Triad chokes are manufactured in a wide variety of inductance values and physical configurations. Smoothing chokes are power supply filter chokes having a core with an air gap that prevents saturation at maximum direct current. Specifications. Inductance Ranges: 0.005 H to 15 H. DC Current Ranges: 10 mA to 22.5 A. Resistance Ranges: 0.06 to 3500 Ohms.