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What is this component? It looks a bit like a capacitor, but not exactly, and it is labelled L1 on a small circuit board where there are capacitors labelled C2 and C3…

Mystery Component

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As Majenko says, it's a wire wound inductor on a ferrite core (99.99% probability). If you tell us what the circuit is for and/or show us a photo of the wider context we can prbably add more information. – Russell McMahon Dec 4 '11 at 21:54
Any other markings, e.g. digits? – starblue Dec 5 '11 at 10:03

1 Answer

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An inductor.

Essentially a coil of wire round a ferrite core.

Here's one without the heatshrink around it:

enter image description here

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What is the marking to the right of the "CB" and does the "CB" mean anything? (the manufacturer perhaps?) – JonnyBoats Dec 4 '11 at 19:40
It's most likely the markings of the manufacturer of the heat-shrink sleeving the inductor is encased in. – Majenko Dec 4 '11 at 19:42
Thanks! Now to go dust off an electronics textbook and try to understand what an inductor does… :-) – Kaelin Colclasure Dec 4 '11 at 20:05

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