Murata Electronics LQH31 series, Drum Core Wirewound Inductor, 39 µH, ±10%, 55 mA, 9.36 Ohm DCR, Unshielded, 1206 (3216 Metric) SMD, Tape & Reel.
| Parameter | Value |
|---|---|
| Type | Drum Core, Wirewound |
| Series | LQH31 |
| Mounting | Surface Mount |
| Current rating | 55 mA |
| Frequency - self resonant | 11MHz |
| Inductance frequency - test | 1 MHz |
| Operating temperature | -40°C ~ 85°C |
| Material - core | Ferrite |
| Size (Dimension) | 0.126\" L x 0.063\" W (3.20mm x 1.60mm) |
| Height - seated | 0.079\" (2.00mm) |
| Package | Tape & Reel (TR) |
| Q @ freq | 40 @ 2.5MHz |
| Shielding | Unshielded |
| Tolerance | ±10% |
| Inductance | 39 µH |
| Case | 1206 (3216 Metric) |
| DC resistance | 9.36Ohm Max |
The LQH31MN390K03L: The unshielded ferrite core yields a self-resonant frequency of 11 MHz and a Q factor of 40 at 2.5 MHz — the SRF marks the upper frequency limit where the inductor behaves capacitively, so this part suits filtering and DC-DC output smoothing below roughly 1-2 MHz where the Q peak is useful. Inductance is tested at 1 MHz, confirming the value holds in the low-MHz switching range common for small-signal power rails and LC filters.
The LQH31 series includes other inductance values in the same 1206 footprint, but a direct parametric substitute for 39 µH at 55 mA with the same DCR and SRF would require a cross-reference search at quote time.