The 15k resistor colour code depends entirely on the number of bands printed on the component body. For a standard 4-band carbon or metal film resistor, the sequence is Brown (1), Green (5), Orange (×1,000 multiplier), and Gold (±5% tolerance). For a 5-band precision metal film resistor, the sequence shifts to Brown (1), Green (5), Black (0), Red (×100 multiplier), and a tolerance band.
Complete 15k Resistor Colour Code Reference Table
Use this spec-sheet-table to instantly identify the correct bands for 15,000 ohms (15kΩ) across the three most common through-hole formats. Read the bands from left to right, keeping the tolerance band (usually Gold, Silver, or a spaced-out color) on the far right.
| Band Position | 4-Band (Standard 5%) | 5-Band (Precision 1%) | 6-Band (Precision + Tempco) | Mathematical Meaning |
|---|---|---|---|---|
| Band 1 (Digit 1) | Brown (1) | Brown (1) | Brown (1) | First significant digit |
| Band 2 (Digit 2) | Green (5) | Green (5) | Green (5) | Second significant digit |
| Band 3 (Digit 3 / Multiplier) | Orange (×1k) | Black (0) | Black (0) | Third digit (5-band) or Multiplier (4-band) |
| Band 4 (Multiplier / Tolerance) | Gold (±5%) | Red (×100) | Red (×100) | Multiplier for 5/6-band; Tolerance for 4-band |
| Band 5 (Tolerance / Tempco) | N/A | Brown (±1%) | Brown (±1%) | Tolerance for 5/6-band |
| Band 6 (Tempco) | N/A | N/A | Red (50 ppm/°C) | Temperature coefficient (6-band only) |
Decoding the Bands: What Each Row Means in Practice
Understanding the IEC 60062 standard requires looking at how the significant digits interact with the multiplier. For a 4-band 15k resistor, you are reading '1' and '5' to make 15, then multiplying by 1,000 (Orange) to get 15,000 ohms.
For 5-band and 6-band resistors, the math shifts. You read '1', '5', and '0' to make 150, then multiply by 100 (Red) to arrive at 15,000 ohms. This extra digit band exists because precision resistors (typically ±1% or ±0.5% metal film) require tighter manufacturing controls, and the third digit allows for values like 15.2kΩ or 15.8kΩ that a 4-band system cannot express.
The 6-band variant adds a temperature coefficient (tempco) band. A 15kΩ 6-band resistor with a Red tempco band will drift by 50 parts per million (ppm) for every 1°C change in ambient temperature. In a standard 25°C room, this is negligible, but if you are building an outdoor solar charge controller or an automotive ECU sensor divider, that tempco dictates whether your 15k resistor will drift out of spec when the enclosure hits 60°C.
Global Standards, Vintage Variants, and Faded Markings
Today, the 15k resistor colour code is universally governed by IEC 60062. Whether you buy Vishay, Yageo, or generic bulk resistors from a distributor, the brown-green-orange sequence remains identical globally. There is no NEC or regional electrical code equivalent for component-level color coding; it is strictly an international electronics standard.
However, if you are repairing vintage audio equipment or old ham radio gear, you may encounter the obsolete British Standard BS 1852 (also known as the body-end-dot system). In this deprecated system, a 15k resistor might be painted entirely brown (body = 1), with a green tip (end = 5) and an orange dot (multiplier = ×1,000). Always verify the era of the equipment before trusting the physical bands.
Rows and Tolerances People Get Wrong
Even experienced bench technicians misread resistor bands under poor lighting. Here are the specific failure modes for the 15k value:
- The Orange vs. Red Multiplier Trap: Under warm incandescent or yellowed LED bench lighting, Orange (×1,000) can easily look like Red (×100). If you misread the multiplier on a 4-band resistor, you will install a 1.5kΩ resistor instead of a 15kΩ resistor. This 10x error will drastically increase current draw in a pull-up or voltage divider circuit.
- Reading Backwards: Always locate the tolerance band first. Gold (±5%) and Silver (±10%) are never used as significant digits or multipliers in standard IEC 60062 coding. If you see Gold on the far right, read left-to-right. If the resistor has no Gold/Silver, look for a wider gap between the multiplier and the tolerance band, or a thicker band on one end.
- Confusing 5-Band Precision with 4-Band: If you grab a 5-band resistor but try to read it as a 4-band (ignoring the third digit), a 15kΩ 5-band (Brown-Green-Black-Red) will be misread as Brown-Green-Red, which isn't a valid 4-band sequence, leading to confusion. Always count the total bands before decoding.
15k Resistor Colour Code FAQ
What is the SMD equivalent code for a 15k surface mount resistor?
Surface mount device (SMD) resistors do not use color bands; they use printed numeric codes. For a standard 5% tolerance 15kΩ SMD resistor (like a 0805 or 0603 package), the code is 153 (15 followed by three zeros). For a 1% precision SMD resistor, the code is 1502 (150 followed by two zeros). If you are working with the EIA-96 standard for ultra-compact 0402 packages, 15kΩ corresponds to the code 18C.
Why does my 15k resistor measure 14.2k ohms on my multimeter?
A reading of 14.2kΩ on a nominal 15kΩ part indicates either an out-of-spec component, severe thermal drift, or a parallel circuit path. First, check the tolerance band. If it is Silver (±10%), a reading of 14.2kΩ is technically within the 13.5kΩ to 16.5kΩ acceptable range, though it suggests a cheap carbon film part. If it is a Gold (±5%) or Brown (±1%) part, 14.2kΩ is a failure. Carbon composition resistors absorb moisture over decades, permanently lowering their resistance. Replace it with a modern metal film equivalent.
Does the 15k resistor colour code change for high-wattage versions?
No. The IEC 60062 color sequence for 15kΩ remains exactly the same whether you are using a tiny 1/8W (0.125W) axial resistor or a massive 5W cement power resistor. However, on high-wattage wirewound or cement resistors (2W and above), manufacturers often abandon color bands entirely in favor of direct printed text (e.g., '15KΩ J' where J denotes ±5% tolerance) because the physical surface area and heat dissipation requirements make painted bands unreliable and difficult to read.
