Active production, shielded ferrite, 1 µH for DC-DC rails
The Murata LQH3NPN1R0MJRL is an active-production shielded wirewound inductor in the LQH3 series, built on a ferrite drum core. It delivers 1 µH ±20% inductance with a rated current of 1.23 A and a saturation current of 2.25 A — the gap between rated and Isat means the core holds its inductance well into overload before rolling off. The 48 mΩ maximum DC resistance keeps I²R losses under 73 mW at full rated current — within the thermal budget of a typical 1212 footprint on a two-layer board with minimal copper pour. Shielding is integral to the ferrite core construction; the closed magnetic path reduces radiated EMI into adjacent traces and components, which matters when the inductor sits near a sensitive ADC or RF front-end on the same rail.
Footprint, profile, and temperature envelope
The surface-mount termination suits standard reflow profiles for lead-free solder. Rated for operation from -40°C to 105°C, the inductor covers industrial and automotive cabin-temperature environments. The self-resonant frequency of 100 MHz sets the usable band well above typical DC-DC switching frequencies (100 kHz to 2 MHz), so parasitic self-resonance does not intrude on the passband.
Sourcing and compliance posture
The base product number LQH3NPN covers the family; the suffix 1R0MJRL encodes the 1 µH inductance, ±20% tolerance, and packaging in Tape & Reel (TR) or Cut Tape (CT). RoHS compliance is standard for Murata's LQH3 series, though the specific directive declarations should be verified against the manufacturer's certificate at order.