4S6TMP.com — Resistor 3/4-digit & EIA-96 | Capacitor codes & package sizes
| Package | Length (mm) | Width (mm) | Power (W) |
|---|---|---|---|
| 0201 | 0.6 | 0.3 | 1/20 (0.05) |
| 0402 | 1.0 | 0.5 | 1/16 (0.0625) |
| 0603 | 1.6 | 0.8 | 1/10 (0.1) |
| 0805 | 2.0 | 1.25 | 1/8 (0.125) |
| 1206 | 3.2 | 1.6 | 1/4 (0.25) |
| 1210 | 3.2 | 2.5 | 1/2 (0.5) |
| 2512 | 6.4 | 3.2 | 1 (1.0) |
| Code | Value | Code | Value | Code | Value |
|---|---|---|---|---|---|
| 100 | 10Ω | 101 | 100Ω | 102 | 1kΩ |
| 103 | 10kΩ | 104 | 100kΩ | 105 | 1MΩ |
| 220 | 22Ω | 221 | 220Ω | 222 | 2.2kΩ |
| 223 | 22kΩ | 224 | 220kΩ | 225 | 2.2MΩ |
| 470 | 47Ω | 471 | 470Ω | 472 | 4.7kΩ |
| 473 | 47kΩ | 474 | 470kΩ | 475 | 4.7MΩ |
3-digit code: First two digits are the significant figures, third digit is the multiplier (power of 10). Example: 103 = 10 × 10³ = 10,000Ω = 10kΩ. 220 = 22 × 10⁰ = 22Ω.
4-digit code: First three digits are significant figures, fourth is the multiplier. Used for 1% precision resistors. Example: 1002 = 100 × 10² = 10,000Ω = 10kΩ.
EIA-96 code: Two digits (01-96) refer to a lookup table value, followed by a letter indicating multiplier. Example: 01C = 100 × 100 = 10,000Ω = 10kΩ. The letter C = ×100.
R notation: Used for values under 10Ω. The R indicates the decimal point. Example: 4R7 = 4.7Ω, 0R1 = 0.1Ω, R10 = 0.10Ω.
Numeric codes are always in picofarads (pF). 104 = 10 × 10⁴ pF = 100,000 pF = 100nF = 0.1μF. 4n7 = 4.7nF. 2p2 = 2.2pF. 1u0 = 1.0μF.
The letter at the end of some ceramic capacitor codes indicates tolerance: J = ±5%, K = ±10%, M = ±20%, Z = +80%/-20%.
Why do some SMD resistors have no marking? Resistors smaller than 0603 (1.6mm × 0.8mm) often have no marking because there's not enough space. For these, you must rely on the tape/reel label or measure with a multimeter.
What's the difference between 0603 and 0805? 0603 is 1.6mm × 0.8mm; 0805 is 2.0mm × 1.25mm. 0603 is more common in modern designs but harder to hand-solder. 0805 is easier for prototypes and can handle more power.
How do I know if a resistor is 1% or 5%? 4-digit codes are typically 1% (E96 series). 3-digit codes are typically 5% (E24 series). EIA-96 codes are always 1%.