Resistors Standard Values
Reference data and engineering information about resistors standard values for electrical applications.
Overview
Engineering reference data for Resistors Standard Values in electrical engineering.
Key Formulas
Ohm's Law
Voltage = Current × Resistance.
Power
Electrical power.
Energy
Energy = Power × Time.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Voltage | V | |
| Current | A | |
| Resistance | Ω | |
| Power | W |
E Series Standards (IEC 60063)
The preferred values for resistors are defined by the IEC 60063 standard, also known as the E series. These series are geometric sequences that ensure any resistor value within a given tolerance band can be found within that series. The most common series are E12 (10% tolerance), E24 (5% tolerance), and E48/E96/E192 (for higher precision components).
Resistor Standard Values Tables
Value (Ω) | Value (kΩ) | Multiplier |
|---|---|---|
| 10 | 0.01 | ×10⁰ |
| 12 | 0.012 | ×10⁰ |
| 15 | 0.015 | ×10⁰ |
| 18 | 0.018 | ×10⁰ |
| 22 | 0.022 | ×10⁰ |
| 27 | 0.027 | ×10⁰ |
| 33 | 0.033 | ×10⁰ |
| 39 | 0.039 | ×10⁰ |
| 47 | 0.047 | ×10⁰ |
| 56 | 0.056 | ×10⁰ |
| 68 | 0.068 | ×10⁰ |
| 82 | 0.082 | ×10⁰ |
Source: IEC 60063
Value (Ω) | Value (kΩ) | Multiplier |
|---|---|---|
| 10 | 0.01 | ×10⁰ |
| 11 | 0.011 | ×10⁰ |
| 12 | 0.012 | ×10⁰ |
| 13 | 0.013 | ×10⁰ |
| 15 | 0.015 | ×10⁰ |
| 16 | 0.016 | ×10⁰ |
| 18 | 0.018 | ×10⁰ |
| 20 | 0.02 | ×10⁰ |
| 22 | 0.022 | ×10⁰ |
| 24 | 0.024 | ×10⁰ |
| 27 | 0.027 | ×10⁰ |
| 30 | 0.03 | ×10⁰ |
| 33 | 0.033 | ×10⁰ |
| 36 | 0.036 | ×10⁰ |
| 39 | 0.039 | ×10⁰ |
| 43 | 0.043 | ×10⁰ |
| 47 | 0.047 | ×10⁰ |
| 51 | 0.051 | ×10⁰ |
| 56 | 0.056 | ×10⁰ |
| 62 | 0.062 | ×10⁰ |
| 68 | 0.068 | ×10⁰ |
| 75 | 0.075 | ×10⁰ |
| 82 | 0.082 | ×10⁰ |
| 91 | 0.091 | ×10⁰ |
Source: IEC 60063
Practical Notes
Color Coding: Each resistor value in the E12 and E24 series corresponds to a specific color code pattern (typically 4 or 5 bands). This allows for quick visual identification of a resistor's value and tolerance.
Preferred Values: These standard values are chosen such that each value in the series, when combined with its tolerance band, overlaps with the adjacent values, ensuring there are no gaps in available resistance values for circuit design.