20 Ohm Resistors

A quick Google search turned up this useful bit of information… in other words, “you can’t judge a book by its cover.” :wink:

Tolerance

The standard 3 and 4 digit code does not give us a way to determine the SMD resistor’s tolerance.

In most cases, however, you’ll find that a surface mount resistor marked with the 3-digit code has a tolerance of 5% and a resistor marked with 4-digit code or the new EIA-96 code has a tolerance of 1% or less.

There are many exceptions to this rule, so always check the manufacturer’s datasheet, especially if the component’s tolerance is critical for your application.