Active AEC-Q200 inductor for automotive filtering
The Murata LQH32NZ151J23L is a drum core wirewound inductor in the LQH32 series, rated 150 µH ±5% at 70 mA. It carries AEC-Q200 qualification, meaning it has passed the stress tests required for automotive-grade passive components — temperature cycling, bias humidity, and mechanical shock per the AEC-Q200 rev D framework. Production status is active.
Parametric fit: inductance, current, and DCR
150 µH at 1 MHz test frequency with ±5% tolerance. The 70 mA current rating is the DC bias at which the inductance typically drops by 10% — for a 50 mA load the inductor stays within 5% of nominal. The 9.3 Ohm max DCR sets the DC copper loss: at 70 mA the self-heating is I²R = 46 mW, negligible in free air but relevant in a dense 1210 array. Self-resonant frequency is 7 MHz. Above this the inductor behaves capacitively — the part is suited for switching noise filtering below 1-2 MHz, not for RF tank circuits. Q factor is 40 at 796 kHz, typical for a ferrite-core wirewound at this inductance.
1210 footprint and temperature grade
Unshielded construction — the magnetic field extends beyond the body, so keep a 0.5 mm keep-out zone from adjacent traces carrying sensitive analog signals. The ferrite core material maintains inductance within ±10% across this band; the DCR increases by roughly 0.4%/°C, so at 105°C the winding resistance is about 12 Ohm.