3.3 µH, 530 mA — the DC bias ceiling and the DCR trade-off
The Murata LQH32DN3R3M23L is a 3.3 µH drum-core wirewound inductor in the LQH32 series, rated for 530 mA continuous current with a maximum DC resistance of 260 mOhm. The 530 mA current rating is the DC bias limit where the inductance starts to roll off — for a 3.3 µH part in a buck converter drawing 400 mA, the margin is comfortable, but pushing past 530 mA means the effective inductance drops below the value the control loop was designed around.
Unshielded construction and 50 MHz SRF — where it fits and where it doesn't
Unshielded construction means the magnetic field radiates into the surrounding board area — keep sensitive analog traces or other magnetics at least one part-width away to avoid coupling. The self-resonant frequency of 50 MHz sets the practical upper limit for the inductor in a filter or DC-DC application; above that frequency the component behaves capacitively and the impedance drops.
Active production — sourcing posture for this LQH32 variant
Available in Tape & Reel (TR) or Cut Tape (CT) packaging; the base product number LQH32DN covers the full inductance range in this drum-core family.