Zamiennik cewki

Witam,

czy cewkę BLM15BD121SN1D mogę zastąpić cewką BLM18PG121SN1

??

Normally yes, if the dimensions correspond, but it must be considered if it is used in a critical circuit.

fifi88 писал(а):czy cewkę BLM15BD121SN1D mogę zastąpić cewką BLM18PG121SN1

The answer is NO.
There is a big difference between the rated current of these ferrite beads.
Rated current of the BLM18PG121SN1 is 2A, while BLM15BD121SN1D only 300mA.

Dziękuję za odpowiedź.
A czy BLM18AG121SN1D może być prąd znamionowy ma 500mA, bo niestety na żadnej płycie nie mogę znaleźć GLM15DV121SN1D

I have not explained well in the previous post.
I clarify better.
If the inductance as well as functioning as a filter is used as a safety (fuse) you must use an inductance with the same current.

Machine писал(а):If the inductance as well as functioning as a filter is used as a safety (fuse) you must use an inductance with the same current.

I do not agree with this.
Here is talking about the ferrite beads, not the classic coils (inductors).

At the ferrite beads the most important parameters are the following:
- Impedance (AC resistance) usually specified at frequency 100MHz
- Rated current (maximum allowable current through the ferrite bead)

There is no induction value.

The purpose of ferrite bead is to filter the high frequency interference usually in DC power supply rails. The ferrite bead is not a fuse, so the rated current of the replacement one could be greater.