P30/19-3C81 – FERROXCUBE

The FERROXCUBE P30/19-3C81 core is a high-permeability (µi ≈ 2300) ferrite core designed for power applications operating at frequencies up to approximately 500 kHz. This P core geometry, with outer diameter 30mm and height 19mm, offers a balance between core volume and surface area for heat dissipation. The 3C81 material is a MnZn ferrite characterized by low core losses at elevated temperatures, making it suitable for transformers and inductors in switch-mode power supplies. AL value is typically around 2500 nH per turn squared, dependent on gapping. This core requires careful consideration of winding techniques to minimize leakage inductance and proximity effects, particularly at higher frequencies. The P30/19 geometry facilitates efficient winding and assembly, and its planar surfaces allow for effective heat sinking when necessary.