1.5 µH drum core in the LQH32 series
The Murata LQH32NZ1R5K23L is a 1.5 µH drum core wirewound inductor from the LQH32 series, packaged in a 1210 (3225 Metric) surface-mount footprint. Rated at 400 mA with a maximum DC resistance of 600 mOhm, it targets power-line filtering and DC-DC converter input/output smoothing in automotive and industrial electronics.
AEC-Q200 qualification and temperature range
Qualified to AEC-Q200, the part is screened for automotive-grade stress reliability — thermal shock, moisture resistance, and mechanical shock per the automotive passive-component standard.
Self-resonant frequency and Q factor
Self-resonant frequency is 75 MHz, with a Q factor of 20 measured at 1 MHz. The 75 MHz SRF means the inductor behaves as a pure inductive element well into the HF band — above SRF the impedance becomes capacitive, so the effective filtering band stops before that point. For a 1 MHz switching regulator, the SRF provides margin of nearly two decades, keeping the inductor's impedance inductive across the switching harmonics.