When you need tighter precision than a standard 4-band carbon film part can offer, you reach for a 5-band metal film resistor. A 5-band component uses the first three bands for significant digits, the fourth for the multiplier, and the fifth for tolerance. Below is the complete reference data you need to decode them on the bench.
The Complete 5-Band Resistor Color Code Reference Table
The following table maps directly to the IEC 60062 standard used globally for resistor color coding. Read the bands from left to right, keeping the wider-spaced tolerance band on your right.
| Color | Band 1 (1st Digit) | Band 2 (2nd Digit) | Band 3 (3rd Digit) | Band 4 (Multiplier) | Band 5 (Tolerance) |
|---|---|---|---|---|---|
| Black | 0 | 0 | 0 | ×1 Ω | — |
| Brown | 1 | 1 | 1 | ×10 Ω | ±1% (F) |
| Red | 2 | 2 | 2 | ×100 Ω | ±2% (G) |
| Orange | 3 | 3 | 3 | ×1k Ω | — |
| Yellow | 4 | 4 | 4 | ×10k Ω | — |
| Green | 5 | 5 | 5 | ×100k Ω | ±0.5% (D) |
| Blue | 6 | 6 | 6 | ×1M Ω | ±0.25% (C) |
| Violet | 7 | 7 | 7 | ×10M Ω | ±0.1% (B) |
| Grey | 8 | 8 | 8 | ×100M Ω | ±0.05% (A) |
| White | 9 | 9 | 9 | ×1G Ω | — |
| Gold | — | — | — | ×0.1 Ω | ±5% (J) |
| Silver | — | — | — | ×0.01 Ω | ±10% (K) |
Decoding the Bands: Multipliers, Tolerances, and Common Mistakes
Using a 5 band resistance color code calculator or reading the bands manually requires understanding the physical layout of the component. The first three bands establish your base number. For example, a resistor with Brown (1), Black (0), Black (0) gives you the digits 1-0-0. The fourth band, Red (×100), multiplies that base by 100, yielding 10,000 Ω (10kΩ). The fifth band, Brown (±1%), tells you the actual resistance will fall between 9,900 Ω and 10,100 Ω.
Rows People Get Wrong
Even experienced technicians misread bands under poor bench lighting or when rushing. Watch out for these specific traps:
- Gold and Silver Placement: Gold and Silver never appear in the first three digit bands. If you see Gold or Silver, it is either the multiplier (Band 4) or the tolerance (Band 5). If you are reading a Gold band as a "digit 1", you are holding the resistor backwards.
- Red vs. Orange in Fluorescent Light: Under cool-white fluorescent or harsh LED bench lights, red bands often wash out and look distinctly orange. Always verify a suspected orange multiplier (which implies a 1kΩ jump) with a quick DMM check if the circuit behavior seems off by a factor of 10.
- The "Backwards" 5-Band Trap: Some manufacturers print 5-band resistors with uniform spacing. The universal rule to find the correct starting side is to look for the tolerance band (usually Gold, Silver, or Brown). It is typically spaced slightly further away from the other four bands, or the other four bands are grouped tightly together on the left side of the body.
Standard Variants and Safe Interpretation of Faded Components
A common point of confusion for hobbyists moving between electrical wiring and electronics is the assumption that regional standards dictate component colors. Let's clear this up immediately.
IEC 60062 vs. Legacy MIL-SPEC and Wire Code Confusion
Resistor color codes are governed globally by IEC 60062. There is no "NEC resistor code" or "old UK resistor code." A 10kΩ 1% resistor reads exactly the same in Tokyo, London, and Chicago.
However, beginners frequently confuse resistor color codes with wire color codes, where regional standards radically diverge. For instance, NFPA 70 (NEC) mandates white or grey for grounded neutral conductors in the US, while IEC 60446 uses blue, and the old UK standard used black. Do not apply wire color logic to component leads or body bands.
The only true variant you will encounter in 5-band resistors is legacy MIL-PRF-39008 (military specification) parts. Older high-reliability MIL-SPEC resistors sometimes used a 4-band code on a distinctly colored body (e.g., a brown body indicating a specific failure rate or temperature coefficient) rather than a 5th band. If you are salvaging vintage avionics or military radio gear, a 4-band read on a uniquely painted body requires checking the specific MIL-SPEC datasheet, not the standard IEC table.
Safe Interpretation When Markings are Faded or Burned
When a resistor has been subjected to thermal stress, the epoxy coating darkens, and the color bands bake into indistinguishable shades of brown and black. Guessing the value of a burned 5-band resistor is a critical failure point in circuit repair.
The Bench Protocol for Faded Bands:
- Isolate the Component: Use a temperature-controlled soldering iron (set to ~350°C for leaded, ~380°C for lead-free) to desolder and lift one leg of the resistor off the PCB pad.
- Clean the Leads: Clip the lifted lead to remove any oxidized solder that might add contact resistance.
- Measure with a DMM: Use a 4-wire (Kelvin) measurement if the value is under 10 Ω. For standard 5-band values (usually 100 Ω to 1M Ω), a standard 2-wire DMM on the appropriate range is sufficient.
- Verify the Tolerance: If the measured value is 10.4kΩ, and you suspect it was originally a 10kΩ 1% part (which should max out at 10.1kΩ), the component has drifted out of spec and must be replaced, regardless of what the faded bands look like.
By relying on the IEC 60062 table for intact components and strict isolation protocols for damaged ones, you eliminate guesswork and ensure your repairs and builds operate exactly as engineered.
