PoE120PL 120W Planar Transformers Coilcraft PoE120PL 120W Planar Transformers are designed for active clamp forward topology. These ferrite core transformers feature high efficiency, good direct current resistance (DCR), and low leakage inductance. Coilcraft PoE120PL 120W Planar Transformers operate at a 200kHz frequency and 36V to 72V input voltage range. The modules provide 0.009' clearance above the seating plane and include a 12V auxiliary winding.