Coilcraft, Inc. WB4-1HL WB4-1HL

The WB4-1HL is a surface mount wideband transformer with a 1:4 impedance ratio, designed for RF applications operating from 0.100 to 500 MHz. It features a maximum insertion loss of 0.50 dB, a primary inductance of 25 µH, and a primary DCR of 120 mΩ. The secondary inductance is 100 µH with a DCR of 160 mΩ. The transformer supports up to 250 mA current, has 500 Vrms interwinding isolation, and operates from -40°C to +85°C. It uses ferrite core material and has RoHS-compliant matte tin terminations. The size is consistent with the WB series surface mount package, weighing 0.38-0.40 g. It is rated for three reflow cycles at 260°C and meets MSL level 1 for moisture sensitivity.