Naming method for surface mount resistors

The naming method for domestic surface mount resistors:

Original location

1. 5% accuracy naming: 05K102JT. html "target=" -blank "title=" RS-05K102JT ">RS-05K102JT Original position 2, 1% accuracy naming: RS-05K1002FT Original position R - represents resistance Original position S - represents power 0402 is 1/16W, 0603 is 1/10W, 0805 is 1/8W, 1206 is 1/4W, 1210 is 1/3W, 1812 is 1/2W, 2010 is 3/4W, 2512 is 1W. Original position 05- represents size (inches): 02 represents 0402, 03 represents 0603, 05 represents 0805, 06 represents 1206, 1210 represents 1210, 1812, 10 represents 1812. 1210 and 12 represent 2512. The original position K - represents a temperature coefficient of 100PPM. html "target=" -blank "title=" 100PPM ">100PPM. The original position has a precision of 102-5%. Resistance value representation: the first two digits represent significant figures, and the third digit represents how many zeros there are, with the basic unit being Ω. 102=10000 Ω=1K Ω. 1002 is a 1% resistance value representation: the first three digits represent significant figures, and the fourth digit represents how many zeros there are, with the basic unit being Ω. 1002=100000. html" target="-blank" title="100000">100000 Ω=10K Ω. The original position J - represents an accuracy of 5%, and F - represents an accuracy of 1%. Original position T - indicates packaging with tape  diode

Original location

The precision of the resistance error of surface mount resistors includes ± 1%, ± 2%, ± 5%, and ± 10% precision. The most commonly used precision is ± 1% and ± 5%. The conventional precision of ± 5% in the original text is represented by three digits. Example 512, the first two digits are significant figures, and the third digit 2 represents how many zeros there are, with the basic unit being Ω. This is 5100 ohms, 1000 Ω=1K Ω, 100000. html "target=" bwlank "title=" 100000 ">1000000 Ω=1M Ω. In order to distinguish between ± 5% and ± 1% resistors, ± 1% resistors are usually represented by four digits. In the original text, the first three digits represent significant figures, and the fourth digit represents how many zeros there are. 4531 That's 4530 Ω, which is equivalent to 4.53K Ωdiode