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Examples: Inductor Markings

<^< Inductor Markings | Course Index | Inductor Symbols >^>(:nl:)

>>frame round<< Example 1:

A ferrite cored inductor is marked with the legend '471K'.

What is its value? >><<

>>id=example1 class=question margin=10px frame round<< The value (in µH) will be given by the first two digits (47) followed by the number of zeros indicated by the third digit (1).

The value of the inductor is thus 470µH.

The final letter (K) indicates that the inductor has a tolerance of 10%. >><<

>>frame round<< Example 2:

A circuit requires an inductor of 68µH with a tolerance of 5%.

What is it likely to be marked? >><<

>>id=example2 class=question margin=10px frame round<< The marking (in µH) will show the first two digits (68) followed by the number of zeros (0).

Since the tolerance is 5%, the final letter should be J.

Thus the marking should be '680J'. >><<(:nl:)(:table style="clear:both":)