radioLearner
Newbie level 3
I purchased a 330 uH "power" inductor on eBay. The listing had the following data:
330UH Inductance 6.2x6x3.2mm Shield Surface Mount SMD Power Inductors
Product Name SMD Inductor
Type Surface Mounting(SMD )
Inductance 330uH (331 )
Body Size 6.2 x 6 x 3.2mm/ 0.24" x 0.24"x 0.12" (L*W*H)
Color Gray, Silver Tone
Material Ferrite Core, Metal
Weight 5g
The image for the part is at
I need a 330 uH inductor in an application where the maximum frequency is less than 700 kHz. Since there is no datasheet supplied with this part, and only the above listed data provided, I do not know if the self-resonant frequency of the part is appropriate for a 700 kHz application, i.e., that the self-resonant frequency of the part is higher than 700 kHz..
Since it is listed as a "power" inductor, is it automatically limited to "low" frequencies, perhaps less than 1 kHz, or is that not the case?
I tried determining the self-resonant frequency with a signal generator and oscilloscope putting the part in series with a 10 ohm resistor. As the frequency was increased the voltage across the 10 ohm resistor dropped, but kept dropping up to about 1.3 MHz, which seems too high to me for something listed as a "power" inductor.
I am new to RF work.
Thanks.
330UH Inductance 6.2x6x3.2mm Shield Surface Mount SMD Power Inductors
Product Name SMD Inductor
Type Surface Mounting(SMD )
Inductance 330uH (331 )
Body Size 6.2 x 6 x 3.2mm/ 0.24" x 0.24"x 0.12" (L*W*H)
Color Gray, Silver Tone
Material Ferrite Core, Metal
Weight 5g
The image for the part is at
I need a 330 uH inductor in an application where the maximum frequency is less than 700 kHz. Since there is no datasheet supplied with this part, and only the above listed data provided, I do not know if the self-resonant frequency of the part is appropriate for a 700 kHz application, i.e., that the self-resonant frequency of the part is higher than 700 kHz..
Since it is listed as a "power" inductor, is it automatically limited to "low" frequencies, perhaps less than 1 kHz, or is that not the case?
I tried determining the self-resonant frequency with a signal generator and oscilloscope putting the part in series with a 10 ohm resistor. As the frequency was increased the voltage across the 10 ohm resistor dropped, but kept dropping up to about 1.3 MHz, which seems too high to me for something listed as a "power" inductor.
I am new to RF work.
Thanks.