1.5 µH Shielded Power Inductor for Automotive-Grade DC-DC Rails
The Murata LQH32PH1R5NNCL is a 1.5 µH ±30% shielded wirewound inductor in the LQH32 series, rated for 2.1 A continuous with a saturation current floor of 2.6 A.
What the DCR and Current Ratings Mean for Your Power Budget
The 63.6 mOhm maximum DCR sets the I²R conduction loss — at 2.1 A the copper loss is 280 mW, which must be dissipated into the board copper without exceeding the +85°C ambient ceiling. The 2.6 A saturation current (Isat) is 24 % above the rated current, giving headroom for transient load steps before the inductance rolls off — a margin that matters when the downstream regulator's valley-current limit triggers near the inductor's knee. Self-resonant frequency at 70 MHz confirms this inductor stays inductive well above the 2–4 MHz switching frequencies typical of automotive buck converters, so the parasitic capacitance does not couple switching noise into the output.
Board Fit and Package Dimensions
Ferrite core construction with full magnetic shielding minimises radiated emissions into adjacent traces, a requirement for passing CISPR 25 conducted emissions in automotive modules.