# What does impedance in datasheets mean?

Can anyone explain impedance in a datasheet? What does this mean:

(50 uH + 5 ohm) || 50 ohm

Line impedance stabilization network (LISN). Like this one : schwarzbeck.de/Datenblatt/k8124.pdf.

• The data sheet for what? What kind of impedance? Input impedance? Output impedance? Transfer impedance? Characteristic impedance? Jan 27 at 6:22

If you post the datasheet that you're reading I could answer it with more confidence, but what you wrote here can be read as a $$\50 \ \mathrm{\mu H}\$$ inductance in series with a $$\ 5 \ \Omega\$$ resistance and all that in parallel with a $$\50 \ \Omega\$$ resistance. Like this: