The AC3028SQ Series from Bourns are Air Coil Inductors. They have an inductance in the range of 27-47 nH and have inductance tolerances of ±2 and ±5. These power inductors have current ratings of up to 5.5 A and a DC resistance in the range of 8.1-11.3 milli-ohms, featuring high Q value. They are designed to operate across a wide temperature range of -25°C to +125°C. These RoHS-compliant power inductors are available in surface-mount packages and are ideal for high frequency television and radio receivers, radio transmitters, RF amplifiers, and tuning applications.