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A 2.26 kΩ, 1%-precision resistor with 5 color bands (), from top, 2-2-6-1-1; the last two brown bands indicate the multiplier (×10) and the tolerance (1%).. An electronic color code or electronic colour code (see spelling differences) is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others.
Silver. ±10%. None. ±20%. The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: 0 = B lack. 1 = B rown. 2 = R ed.
For brevity, the notation omits to always specify the unit (ohm or farad) explicitly and instead relies on implicit knowledge raised from the usage of specific letters either only for resistors or for capacitors, [nb 1] the case used (uppercase letters are typically used for resistors, lowercase letters for capacitors), [nb 2] a part's appearance, and the context.
The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance, measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction. The SI unit of electrical resistance is the ohm ( Ω ...
Ring color Significant figures Multiplier Tolerance Temperature coefficient Name Code RAL Percent [%] Letter [ppm/K] Letter; None – – – – ±20: M
IEC 60227 Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V. IEC 60228 Conductors of insulated cables. IEC 60229 Electric cables – Tests on extruded over-sheaths with a special protective function. IEC 60230 Impulse tests on cables and their accessories.
A common application of the 25-pair color code is the cabling for the Registered Jack interface RJ21, which uses a female 50-pin miniature ribbon connector, as shown in the following table. The geometry of the pins of the receptacle (right hand image) corresponds to the pin numbers of the table.
While I'm thinking of it, we also need to cover the 5-band resistor color code with 3 significant digits, multiplier, and tolerance bands which is commonly used for axial type 1% and 2% metal film resistors.--Tothwolf 17:10, 27 October 2009 (UTC) Pictures of old capacitors would be good.