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| | Components - Part 2 |
 | | Following this logic, the preferred values for 10% tolerance resistors between 100 and 1,000Ω is a roughly logarithmic sequence of 100, 120, 150, 180, 220, 270, 330 and so on (rounded to the closest sensible value). |
 | | Electrolytics usually follow a limited range of the E12 series, and in the case of larger types, may not follow any particular series at all. |
 | | In many cases, the preferred current will be too high and will cause excessive heating, but it must be understood that the regulation of the zener is not very good until it is operating at the lower limit of 10% rated power. |
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