Automotive-grade power inductor for DC-DC input/output filtering
The Murata LQH32PH2R2NNCL is a 2.2 µH shielded wirewound inductor from the LQH32 series, qualified to AEC-Q200 for automotive applications. The ferrite core and shielded construction contain the magnetic field, reducing EMI coupling to nearby traces in a tightly packed ECU layout. The 76.8 mOhm max DCR keeps I²R losses under 0.26 W at full load, manageable in a 1210 footprint without derating the ambient.
AEC-Q200 qualification and temperature profile
AEC-Q200 qualification means the inductor has passed the stress tests required for automotive-grade passive components: thermal shock, moisture resistance, mechanical shock, and vibration per the AEC-Q200 rev D standard.
Self-resonant frequency and test conditions
The self-resonant frequency of 70 MHz sets the upper bound for effective filtering — above this frequency the inductor behaves capacitively. Inductance is tested at 1 MHz, which is the standard test frequency for the 2.2 µH value and aligns with the switching frequencies of most automotive DC-DC converters (400 kHz to 2.2 MHz). The ±30% tolerance is typical for power-grade ferrite inductors; the saturation current (2 A) is the hard limit for the design, not the nominal inductance tolerance. The shielded construction and 1210 (3225 metric) footprint allow direct replacement in existing LQH32PH layouts without board spin.