Active production, automotive-grade inductor for DC-DC filtering
The Murata LQH32NH270J23L is a drum core wirewound inductor in the LQH32 series, rated 27 µH with ±5% tolerance. It carries AEC-Q200 qualification, meaning it has passed the stress tests for automotive-grade passive components — thermal shock, moisture resistance, and mechanical vibration per the standard. Rated for 195 mA continuous current with a maximum DC resistance of 1.2 Ohm. The DCR sets the I²R conduction loss: at full rated current the self-heating is roughly 46 mW, well within the package's dissipation capability for most PCB layouts. Self-resonant frequency is 20 MHz, placing the usable inductance band below that point. Above SRF the component behaves capacitively — for a 1 MHz switching regulator the inductor stays inductive with margin; for a 10 MHz converter the margin narrows and the effective inductance rolls off. Operating temperature range is -40°C to +125°C, covering under-hood automotive ambient and industrial enclosure environments. The ferrite core material maintains inductance stability across this band, though the saturation current derates at the high end.
1210 footprint and unshielded construction — layout considerations
The footprint matches standard 1210 solder pads — no special land pattern needed for reflow assembly. Unshielded construction means the magnetic field radiates from the drum core. In a dense layout, keep sensitive analog traces or low-level signal loops at least one body width away to avoid coupling. The Q factor of 35 at 1 MHz indicates moderate AC losses — adequate for power filtering but not a high-Q tuned circuit. Available on tape and reel or cut tape — the reel format suits automated pick-and-place for production volumes; cut tape works for prototyping or small-batch builds. The supplier device package code is 1210 (3225 Metric).
Sourcing posture for this active Murata part
Sourced through independent distribution channels.