Shielded 470 nH power inductor for DC-DC rail filtering
The Murata LQH32PBR47NNCL is a drum-core wirewound inductor in the LQH32 series, shielded with a ferrite core and housed in a 1210 (3225 metric) surface-mount package. It delivers 470 nH inductance at 1 MHz test frequency with a ±30% tolerance, rated for 2.9 A continuous current. The shielding and ferrite core construction contain the magnetic flux, making this part suitable for DC-DC converter output filtering and power rail decoupling where radiated EMI must stay below board-level limits.
Current rating and saturation headroom
The 2.9 A continuous current rating is the thermal limit at 28.8 mOhm max DCR — at full rated current the I²R loss is roughly 242 mW, which the 1210 body dissipates without exceeding the 105°C upper temperature limit. The saturation current of 4.4 A provides 1.5 A of headroom above the continuous rating, so the inductance does not collapse during load transients or startup inrush. Self-resonant frequency is 100 MHz, well above the switching frequencies of common buck converters (500 kHz to 2 MHz), so the inductor behaves as a pure inductive element in the passband without parasitic capacitive coupling.
Package footprint and reflow integration
The nonstandard case designation means the pad layout follows the 1210 industry-standard land pattern — no special footprint beyond the standard 1210 solder pads is required. The ferrite core material maintains inductance stability across this range, though the ±30% tolerance means the actual inductance at temperature can shift — budget the tolerance into the feedback loop compensation.