Last-buy status on a 500 nH ferrite drum core
This LQH31HNR50J03L is flagged as Last Buy by Murata, meaning the manufacturer has announced end-of-production and is accepting final orders before the part becomes obsolete.
500 nH, 260 mA, 440 mOhm — what the ratings decide
A self-resonant frequency of 270 MHz means this inductor behaves as an inductor well into the VHF band — useful for filtering or impedance matching in RF front-ends up to around 100 MHz before parasitic capacitance dominates. The Q factor of 60 at 100 MHz indicates moderate energy storage efficiency at that frequency; for a narrow-band tuned circuit, the 3 dB bandwidth is proportional to 1/Q, so expect a bandwidth of about 1.7% of the center frequency.
Drum core wirewound in a 1206 body
The ±5% tolerance on 500 nH gives a guaranteed range of 475 nH to 525 nH — tight enough for most resonant tank and filtering applications where the inductance value directly sets the frequency.