744775133

The 744775133 from Würth Elektronik is a 33 µH fixed inductor from the WE-PD2 series. It uses an unshielded ferrite drum core with wirewound construction, designed for surface-mount assembly in a 7850 package with dimensions of 7.8 mm x 7.0 mm x 4.95 mm. The inductor operates over a temperature range of -40 °C to +125 °C and is RoHS, REACH, and halogen-free compliant.

Electrically, the inductance is 33 µH ±10% at 10 kHz/100 mV. The rated current is 1.35 A at a temperature rise of 40 K, while the saturation current is 1.47 A typical. DC resistance is 0.088 Ω typical and 0.13 Ω maximum at 20 °C. The self-resonant frequency is 14.5 MHz typical, and the maximum operating voltage is 120 V DC.

This power inductor is intended for general electronic equipment, particularly power conversion and filtering circuits. The unshielded design should be considered in applications sensitive to electromagnetic interference. The wirewound ferrite construction provides stable inductance at high currents, making it suitable for DC-DC converter output stages and power supply input filtering.