✓ Diode Color Id Band Table

Diode Color Id Band Table

Zener diodes have an additional letter which will appear after the numbers. With brown being a 1 orange a 3 and white 9 the device would be identified as a type 139 semiconductor diode or specifically 1n139.

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Diode color id band table this table is the information used by most diode manufacturers that use color banding on diodes.

Diode color id band table. The diode is a two lead device and there is a white or black band at the cathode end. The peak inverse voltage is the maximum voltage a diode can withstand when it is reverse biased. Most manufacturers stamp the id right on the diode but some do use color banding as the method of identification.

Diodes used for rectification should have sufficient peak inverse voltage piv. Take for example a diode with brown orange and white bands at one terminal and figure out its identification number. A 1 b 2 c 5 d 10 zener diodes have additional characters which will indicate the zener voltage.

Polarity identification is simple. This letter denotes the tolerance of the zener voltages. The jedec series diode color code assumes the first two digits are 1n the next two to four digits in the part numbers are the color bands.

The following letters are used for this purpose. The standard diode color code system is shown in figure 1 27. Zener diode code identification.

Examples using diodes in chart above top diode 1n64e middle diode 1n452g bottom diode 1n4762. The last color band in four and five color band diodes is the suffix letter if the diode has a suffix. Each color band represents numbers like the standard significant digits in the eia color code.

Now try to identify the following diodes aa113.