4band
4band, in the context of electronics, refers to the four-band resistor color code used to encode the resistance value of axial resistors. The code employs four colored bands arranged along the body of the resistor to convey its electrical resistance and tolerance, enabling quick identification without measuring equipment.
How it works: the first two bands represent the significant digits of the resistance value. The third
Color mapping and tolerance: digits are assigned to colors from 0 to 9 (e.g., black 0, brown
Reading direction and usage: the reading starts from the end with two close-together bands, with the tolerance
Variants: some manufacturers apply the fourth band to indicate temperature coefficient (ppm/K) in 4-band parts, while