WE-SL1 Common Mode Chokes Würth Elektronik WE-SL1 Common Mode Chokes feature a low 1.65mm profile that results in outstanding common-mode noise suppression. This series is designed for circuits with 300mA of current and can sustain impedances up to 2000Ω. They have an 80VDC (42VAC) operating voltage and -40°C to +105°C operating temperature range. Würth WE-SL1 Common Mode Chokes can be used to filter common-mode noise in data lines and small power lines. They are ideal for circuits with height restrictions or for when components need to be placed on the backside of a PCB.