Coilcraft, Inc. WBT4-1L WBT4-1L

The WBT4-1L is a wideband transformer with a 1:4 impedance ratio and center taps on both primary and secondary windings, designed for RF applications. It operates over a bandwidth of 0.040 to 150 MHz with a maximum insertion loss of 0.26 dB. The primary inductance is 45 µH minimum at 100 kHz, with a DC resistance of 120 mΩ max, while the secondary inductance is 135 µH minimum and DC resistance is 160 mΩ max. The transformer supports up to 250 mA current, has 500 Vrms interwinding isolation, and handles 1/4 W RF input power. It is available in a through-hole package with dimensions specified in inches, weighing 0.38-0.40 g. The operating and storage temperature range is -40°C to +85°C, with MSL 1 moisture sensitivity and RoHS-compliant terminations.