passive electronic component

  The introduction of   NTC thermistor resistor , NTC (negaTive Temperature Coefficient) refers to the thermistor phenomenon and material with a negative temperature coefficient and the resistance decreases exponentially as the temperature rises. The material is a semiconductor ceramic made of two or more metal oxides such as manganese, copper, silicon, cobalt, iron, and zinc, which are fully mixed, molded, and sintered. It can be made into a thermistor with a negative temperature coefficient (NTC), in which the resistivity and material constant vary with the material composition ratio, sintering atmosphere, sintering temperature and structural state. At present, non-oxide NTC thermistor materials represented by silicon carbide, tin selenide, and tantalum nitride are also available. NTC thermal semiconducting ceramics are mostly oxide ceramics with a spinel structure or other structures, which have a negative temperature coefficient. The resistance value can be approximated as: RT0 is

  SMD resistor introduction Chip resistors  are also called chip fixed resistors. Chip fixed resistors are commonly known as SMD resistors, which are a kind of metal glass shaft resistors. It is a resistor made by mixing metal powder and glass shaft powder and printing it on the substrate by screen printing. It is resistant to humidity, high temperature, and has a small temperature coefficient. Classification of chip resistors SMW wire wound chip resistors Flameproof UL94V0 molded package, resistant to heat, humidity &insulation. SMF power metal film chip resistors Flameproof UL94V0 molded package, resistant to heat, humidity &insulation. MCM thick film chip resistors Minature size can compact P.C.Board. RMM metal film melf resistors SMD enabled structure with excellent solder-ability. CP Chip Resistor High power Chip Resistors Characteristics of chip resistors Small size and light weight Adapt to reflow soldering and wave soldering Stable electrical performance and high reliab

  The application of surface mount technology (SMT) has become very common, and the proportion of electronic products assembled by SMT has exceeded 90%. With the development of small SMT production equipment, the application range of SMT is further expanded. Aviation, aerospace, instrumentation, machine tools and other fields are also using SMT to produce a variety of small-volume electronic products or components. In recent years, in addition to electronic product developers developing new products with SMD devices, maintenance personnel have also begun to repair a large number of electronic products assembled with SMT technology. At present, the models of chip resistors are not uniform, and are set by each  chip resistor manufacturer , and the model is particularly long (consisting of more than a dozen English letters and numbers). If the various parameters and specifications of the chip resistors can be correctly proposed when purchasing, then the required resistors can be easily pu