WE-ACHC High Current Air Coils Würth Elektronik WE-ACHC High Current Air Coils feature flat wire for high-frequency applications. Available in two sizes, 1010 and 1212, the WE-ACHC has an IR up to 40A and up to 50% higher Q-Factor than other products. The coil label enables pick-and-place assembly. Würth Elektronik WE-ACHC High Current Air Coils are suitable for high power filters, RF-Voltage regulators, and high-current applications.