Naming of chip resistors 1

The naming of chip resistors includes product code, model, temperature coefficient of resistance, resistance value, resistance value error, packaging method, RC, chip resistor, code, model, code, T.C.R. representation method, resistance value, code, error value, code, packaging method. 02 0402 K ≤±100PPM/℃ E-24 The first two digits represent significant digits, and the third digit represents the number of zeros. F ±1% T Taped packaging 03 0603 L ≤±250PPM/℃ G ±2% 05 0805 U ≤±400PPM/℃ E-96 The first three digits represent significant digits, and the fourth digit represents the number of zeros. J ±5% B Plastic box loose packaging 06 1206 M ≤±500PPM/℃ 0 Jumper resistor Example RC 05 K 103 J Note: The decimal point is represented by R. For example: E-24: 1RO=1.0Ω 103=10KΩ; E-96:diode 1003=100KΩ; jumper resistors are represented by "000". 4. Selection common sense Select the model and error level of the resistor according to the technical specifications of the electronic device and the specific requirements of the circuit; the rated power should be greater than 1.5-2 times the actual power consumption; measure and verify the resistance before assembly, especially when the requirements are high, and perform artificial aging treatment to improve stability; select different types of resistors according to the operating frequency of the circuit. II. Testing methods and experience 1. Testing of fixed resistors Connect both pen probes (regardless of positive or negative) to the two ends of the resistor to measure the actual resistance value. To improve measurement accuracy, select the range according to the size of the nominal value of the resistor being tested. Due to the nonlinear relationship of the ohms scale, the middle section of the scale is finer, so the pointer indication should be placed as close as possible to the middle section of the scale, within the range of 20% to 80% of the full scale, to make the measurement more accurate. Depending on the error level of the resistor.diode