Standard Resistors Values

GUIDE: Standard Resistors Values

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Reference and Sources:

The technical specifications for a resistor are:

  • nominal resistance value [Ohm]
  • tolerance %
  • nominal dissipable power [W]
  • power-temperature diagrams
  • temperature coefficient
  • nominal maximum voltage [V]
  • noise tension
  • tension coefficient
  • resistance-frequency characteristic
the first three are always indicated.

The succession of nominal resistance values fit a geometric progression:
N = 10((n-1)/k)
where: N is the nominal resistance value at n position;
k is a coefficient related to tolerance in this way:

Tolerance [%] k Series Name
20 6 E6
10 12 E12
5 24 E24
2 48 E48
1 96 E96
0.5 192 E192
0.25 192 E192
0.1 192 E192

Normalized Values

Values between 1 and 10. The others values can be obtained by multiply these values for powers of 10.

E6
1.00 1.50 2.20 3.30 4.70 6.80 
E12
1.00 1.20 1.50 1.80 2.20 2.70 3.30 3.90
4.70 5.60 6.80 8.20 
E24
1.00 1.10 1.20 1.30 1.50 1.60 1.80 2.00
2.20 2.40 2.70 3.00 3.30 3.60 3.90 4.30
4.70 5.10 5.60 6.20 6.80 7.50 8.20 9.10 
E48
1.00 1.05 1.10 1.15 1.21 1.27 1.33 1.40
1.47 1.54 1.62 1.69 1.78 1.87 1.96 2.05
2.15 2.26 2.37 2.49 2.61 2.74 2.87 3.01
3.16 3.32 3.48 3.65 3.83 4.02 4.22 4.42
4.64 4.87 5.11 5.36 5.62 5.90 6.19 6.49
6.81 7.15 7.50 7.87 8.25 8.66 9.09 9.53 
E96
1.00 1.02 1.05 1.07 1.10 1.13 1.15 1.18
1.21 1.24 1.27 1.30 1.33 1.37 1.40 1.43
1.47 1.50 1.54 1.58 1.62 1.65 1.69 1.74
1.78 1.82 1.87 1.91 1.96 2.00 2.05 2.10
2.15 2.21 2.26 2.32 2.37 2.43 2.49 2.55
2.61 2.67 2.74 2.80 2.87 2.94 3.01 3.09
3.16 3.24 3.32 3.40 3.48 3.57 3.65 3.74
3.83 3.92 4.02 4.12 4.22 4.32 4.42 4.53
4.64 4.75 4.87 4.99 5.11 5.23 5.36 5.49
5.62 5.76 5.90 6.04 6.19 6.34 6.49 6.65
6.81 6.98 7.15 7.32 7.50 7.68 7.87 8.06
8.25 8.45 8.66 8.87 9.09 9.31 9.53 9.76 
E192
1.00 1.01 1.02 1.04 1.05 1.06 1.07 1.09
1.10 1.11 1.13 1.14 1.15 1.17 1.18 1.20
1.21 1.23 1.24 1.26 1.27 1.29 1.30 1.32
1.33 1.35 1.37 1.38 1.40 1.42 1.43 1.45
1.47 1.49 1.50 1.52 1.54 1.56 1.58 1.60
1.62 1.64 1.65 1.67 1.69 1.72 1.74 1.76
1.78 1.80 1.82 1.84 1.87 1.89 1.91 1.93
1.96 1.98 2.00 2.03 2.05 2.08 2.10 2.13
2.15 2.18 2.21 2.23 2.26 2.29 2.32 2.34
2.37 2.40 2.43 2.46 2.49 2.52 2.55 2.58
2.61 2.64 2.67 2.71 2.74 2.77 2.80 2.84
2.87 2.91 2.94 2.98 3.01 3.05 3.09 3.12
3.16 3.20 3.24 3.28 3.32 3.36 3.40 3.44
3.48 3.52 3.57 3.61 3.65 3.70 3.74 3.79
3.83 3.88 3.92 3.97 4.02 4.07 4.12 4.17
4.22 4.27 4.32 4.37 4.42 4.48 4.53 4.59
4.64 4.70 4.75 4.81 4.87 4.93 4.99 5.05
5.11 5.17 5.23 5.30 5.36 5.42 5.49 5.56
5.62 5.69 5.76 5.83 5.90 5.97 6.04 6.12
6.19 6.26 6.34 6.42 6.49 6.57 6.65 6.73
6.81 6.90 6.98 7.06 7.15 7.23 7.32 7.41
7.50 7.59 7.68 7.77 7.87 7.96 8.06 8.16
8.25 8.35 8.45 8.56 8.66 8.76 8.87 8.98
9.09 9.19 9.31 9.42 9.53 9.65 9.76 9.88 


 

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