Standard Resistors Values

Reference and Sources:

• Manuale di elettronica e telecomunicazioni - Giuseppe Biondo, Enrico Sacchi. Vol.II - IX-40
• http://users.eecs.ukans.edu/~kuku/Standard_Resistors.php

The technical specifications for a resistor are:

• nominal resistance value [Ohm]
• tolerance [%] (indicate the maximum difference (+/-) between nominal and real resistance value)
• 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