56 µH shielded power inductor for automotive and industrial DC-DC
The Murata LQH3NPH560MMEL is a 56 µH shielded wirewound inductor in the LQH3 series, qualified to AEC-Q200 for automotive applications. Rated 500 mA continuous with a saturation current floor of 350 mA, this part suits DC-DC converter output filters and power-supply noise suppression where the load current stays under the saturation knee. The 1.2 Ohm max DCR sets the I²R conduction loss — at 500 mA the self-heating is about 0.3 W, which the 1212 (3030 Metric) footprint dissipates into the board copper. The 5 MHz self-resonant frequency means the inductor behaves as an inductor up to roughly 5 MHz; above that parasitic capacitance dominates, so filter designs should place the switching frequency well below this ceiling.
AEC-Q200 qualification and temperature range
AEC-Q200 qualification means this inductor passed the automotive-grade stress tests: thermal shock, humidity bias, mechanical shock, and vibration per the AEC-Q200 rev D stress sequence.
The surface-mount ferrite drum core construction with wirewound termination suits reflow soldering; the ±20% tolerance is typical for power inductors where the inductance value is less critical than the saturation current floor. Inductance is tested at 1 MHz. The 500 mA current rating is the DC current at which the temperature rise reaches the rated limit — the actual usable current in a 85°C ambient is lower and should be derated per the manufacturer's application note. The 350 mA saturation current is the DC bias at which inductance drops by 10% typically; staying below this knee keeps the ripple current under control in a buck converter.