Inductors & RF Chokes

Could I use a 100uH RF choke (physically resembling a 1/2 watt resistor) in place of a 100uH power inductor on a switching power supply circuit.

If it's an RF inductor intended for use in radio circuits then it won't work in a SMPS. Inductors for SMPS will be rated for high currents.

With a (ferrite) cored inductor, exceeding the rated current will cause saturation of the core which will reduce the inductance.

With an air cored inductor its only the thickness of the wire that determines the current rating.

If your inductor looks like the one you are proposing to replace then maybe you could try it.

kittydog42 said:

Could I use a 100uH RF choke (physically resembling a 1/2 watt resistor) in place of a 100uH power inductor on a switching power supply circuit.

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That depends on the inductor's current rating, the current you intend to pass and the frequency.