Coilcraft, Inc. B0863-B Transformer for PoE Powered Devices B0863-BL B0863-BLD

PoE transformer designed for the Maxim MAX5941B PoE interface/pwm controller, operating at 275 kHz with a 50% duty cycle in forward topology. The component supports 28-60 V input and delivers 3.3 V at 4 A from parallel-connected secondary windings with a 1:0.29 turns ratio and 1500 Vrms isolation. It has a primary inductance of 165 µH minimum, a primary DCR of 0.061 Ω max, and leakage inductance of 0.75 µH max. The transformer is packaged in an EIA-481 embossed plastic tape on a 13" reel with 200 units per reel, weighs 5.6 g, and operates from -40°C to +85°C. It is rated MSL 1 and withstands three reflow cycles at 260°C. Terminations are RoHS-compliant tin-silver over tin over nickel over phosphor bronze.