1206 USB 2.0 Common Mode Chokes Coilcraft 1206 USB 2.0 Common Mode Chokes eliminate virtually all common mode noise in high-speed differential mode signal transmission applications. These devices offer up to 2.7GHz differential mode (3dB cutoff frequency), up to 2.24kΩ common mode peak impedance, and up to 40dB common mode noise attenuation. Coilcraft 1206 chokes feature a core material of ferrite, gold over nickel over silver-palladium-glass frit terminations, and an ambient temperature range of -40°C to +85°C with IRMS current.