What is the component

[electronicsLearner77]

Please help me to find out what is the component .It looks like a ferrite, but the symbol is different.

 

[Martaine2005]

Looks to be an iron core inductor.


Martin

 

[electronicsLearner77]

But it is mentioned in Ohm similar to ferrite.

 

[Audioguru]

Inductance is measured in Henries. 120 ohms is the resistance of the fine wire that has many turns.
The reactance at one frequency is also measured in ohms but it is not stated.

 

[Harald Kapp]

The reactance at one frequency is also measured in ohms but it is not stated.

Allow me to disagree: "inductors" referenced in Ohms are usually ferrites.
@electronicsLearner77 : As in your other thread: you need to know the frequency a which the impedance is specified. Look up the datasheet of the component (type of component should be in the BoM).

 

[Martaine2005]

With the symbol shown, ie: solid lines, indicates to me that It’s an iron core inductor. Broken lines/dashes, indicate a ferrite core. So unless these symbols are being used incorrectly, I’d adhere to the schematic with its symbols.


Martin

 

[Harald Kapp]

@Martaine2005 : I agree to your statement about the solid lines. However, to me it is more likely an incorrect use of the symbol. Otherwise an indiuctance should have been given, as mentioned by @Audioguru , not an impedance.
By the way: The correct way to label the component would have been for example 120 Ω @ 100 MHz. Giving 120 Ω only makes no sense.

 

[Audioguru]

An inductor is labeled in Henries, not it impedance at an unknown frequency.
Is the impedance (reactance) of a capacitor labeled? No, its capacitance is labeled then you use math to calculate its impedance at a certain frequency.

 

[AnalogKid]

Please help me

know where this symbol came from. Please post a larger section of the schematic.

Absent that, I vote with HK - a pcb-mount ferrite bead with an impedance of 120 ohms at some specified frequency (typically 100 MHz).

ak

 

[electronicsLearner77]

 

[davenn]

View attachment 55554

All 3 inductors in that circuit are on power rails. They are noise suppressors. They should be marked in mH or uH not Ohms
they all perform noise suppression on those rails

there is obviously some bad circuit symbol use. All 3 are most likely to be on ferrite cores, single or multi hole ones
or possibly just straight wound onto a ferrite core

for the many shapes and sizes
Ferrite Choke - Bing images

 

[Harald Kapp]

The circuit is obviously from this application note PDF.

There is no further detailed description of the circuit, its operation nor is there a BoM which could be used to find out what is really meant.
Lacking more detailed information I support @AnalogKid 's assumption of a ferrite with the specified impedance @ 100 MHz.

 

[bertus]

Hello,

Have a look at this page for noise reduction ferrite beads:
https://www.murata.com/en-global/products/emc/emifil/overview/lineup/bl
And this page:
https://www.analog.com/en/analog-dialogue/articles/ferrite-beads-demystified.html

Bertus