20 Pcs Toroid Core Inductor Copper Wire Wind Wound 100uH 6A Coil for LM2596-100uH

They all measured around 300 uH (+/- 1 uH), but I'm not using a precision calibrated inductance meter. For making some low power filter networks, they are pretty good quality.

Will use on a project to feed power over coax and block RF. They look very good for what I need them for.

Sure beats making your own with copper wire. These are ready to use and priced right.

I tested these at various frequencies with a DT9935 LCR and the inductance was over 330uH. However, in a circuit with a DC current of 130mA, they get warm. So I would challenge the 3A current rating. Maybe that's the burn through current.

Low resistance and inductance is just as advertised according to my LCR meter. I like the form factor, it will make a great buck converter inductor.

The 3A rating might be accurate as a thermal rating but their cores saturate at low currents at audio frequencies. They are not appropriate for use in loudspeaker crossover networks.

I am using these to filter stray line noise in DIY power supply projects around the house. Such projects included aquarium light power, low voltage power for long LED strips, and telescope rig power box.

You main issue is that a lot of the windings on almost all of the inductors are overlapping or tangled which is obviously not going to induce as much of a magnetic field since the air gap is too large.Please pay more attention to quality control