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Resistors - Letters and Digit Codes

Letter and digit codes to indicating resistor values

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Values of resistors can be indicated with letters and digit codes:

Resistance ValueMark
0.47 Ω R47
1 Ω 1R0
4.7 Ω 4R7
47 Ω 47R
100 Ω 100R
1 1K0
1 1M

Tolerance is indicated as

F = +- 1%

G = +- 2%

J = +- 5%

K = +- 10%

M = +- 20%

Example - Resistor with letter and digit code

4R7K = 4.7 Ω +- 10%

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