Table 2.1.1 Four Band Resistor Colour Code The multiplier band will most commonly be some colour between black (no zeros), indicating a value between10 Ω and a value less than 100Ω, and blue (6 zeros), indicating a value in the tens of millions, e.g. This last version is used in many circuit diagrams and suppliers catalogues (where print may need to be very small) to avoid 2.2K being read as 22K instead of 2K2 where the decimal point may not be obvious. red, red, red indicates 2200Ω, which is normally called 2.2KΩ or 2K2. The first two of these bands indicate two numbers and the third, often called the multiplier band indicates the number of zeros, e.g. ![]() In the four band resistor colour code illustrated in Table 2.1.1, the first three bands (closest together) indicate the value in ohms. The tables on this page illustrate three common forms for four, five and six band resistors. The Colour Codes used on resistors in carbon, carbon film and metal film types are widely used and a ‘must learn’ for electronics engineers.
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