The chip resistor

　　Fixed chip resistors, translated directly from the Chip FixedResistor, commonly known as the chip resistor (SMDResistor), is a kind of metal glass uranium in the resistor.The mixed metal powder and glass powder with uranium,resistors made screen printing on the substrate. Moisture.Moisture resistance, high temperature, low temperature coefficient. (Note: the following fixed chip resistors arecalled chip resistor)
　　SMD resistor classification
　　SMD resistor is divided into the following categories:
　　Classification of reference international
　　Regular series of thick film chip resistors
　　General purpose General purpose, 0201 - 0805
　　General purpose, 1206 - 2512
　　High precision and high stability of chip resistor
　　High precision - high stability High precision high stability,0201 - 0603
　　High precision - high stability, 0805 - 1210
　　High precision - high stability, 2010 - 2512
　　The regular series resistor
　　General purpose thin film General purpose thin film, 0201-2512
　　Low resistance chip resistor
　　Low ohmic Low ohmic, 0402 - 1206
　　Low ohmic, 2010 - 2512
　　Resistor array
　　Arrays Arrays, convex and concave
　　Patch current sensor
　　SMD current sensors Current Sensors - Low TCR
　　SMD resistor network
　　Network Network, T-type and L-type
　　Chip resistors packaging and dimensions
　　Packaging and size SMD resistor as shown in the following table:
　　Inch (MIL) metric (mm) long (L) (mm) wide (W) (mm) and high (T) (mm) a (mm) B (mm)
　　20106030.60 ± 0.05, 0.30 ± 0.05 and 0.23 ± 0.05, 0.10 ±0.05 and 0.15 ± 0.05
　　40210051 ± 0.10, 0.50 ± 0.10 and 0.30 ± 0.10, 0.20 ± 0.10 and 0.25 ± 0.10
　　60316081.60 ± 0.15, 0.80 ± 0.15 and 0.40 ± 0.10, 0.30 ±0.20 and 0.30 ± 0.20
　　80520122 ± 0.20, 1.25 ± 0.15 and 0.50 ± 0.10, 0.40 ± 0.20 and 0.40 ± 0.20
　　120632163.20 ± 0.20, 1.60 ± 0.15 and 0.55 ± 0.10, 0.50 ±0.20 and 0.50 ± 0.20
　　121032253.20 ± 0.20, 2.50 ± 0.20 and 0.55 ± 0.10, 0.50 ±0.20 and 0.50 ± 0.20
　　181248324.50 ± 0.20, 3.20 ± 0.20 and 0.55 ± 0.10, 0.50 ±0.20 and 0.50 ± 0.20
　　201050255 ± 0.20, 2.50 ± 0.20 and 0.55 ± 0.10, 0.60 ±0.20 and 0.60 ± 0.20
　　251264326.40 ± 0.20, 3.20 ± 0.20 and 0.55 ± 0.10, 0.60 ±0.20 and 0.60 ± 0.20
　　The relationship between packaging and power resistors
　　Packaging and power SMD resistor as shown in the following table:
　　Package rated @ 70 ° C maximum working voltage (V) inch(MIL) metric (mm) normal power to improve the power series
　　02010603 1/20W / 25
　　04021005 1/16W / 50
　　06031608 1/16W 1/10W 50
　　08052012 1/10W 1/8W 150
　　12063216 1/8W 1/4W 200
　　12103225 1/4W 1/3W 200
　　18124832 1/2W / 200
　　20105025 1/2W 3/4W 200
　　25126432 1W / 200
　　Note: voltage = √ power X resistance (P=V2/R) is smaller or the maximum working voltage of the two values
　　Characteristics of chip resistor
　　And has the advantages of small volume, light weight;
　　· suit for reflow and wave soldering;
　　· stable performance, high reliability;
　　· low assembly cost, and automatic SMT equipment;
　　· high mechanical strength, superior high frequencycharacteristics.
　　Nomenclature for the chip resistor
　　Nomenclature for domestic chip resistor:
　　Name 1, accuracy of 5%: RS-05K102JT
　　Name 2, accuracy of 1%: RS-05K1002FT
　　R said resistance
　　S said the power of 0402 is 1/16W, 0603 1/10W, 08051/8W, 1206 1/4W, 1210 1/3W, 1812 1/2W, 2010 3/4W,2512 1W.
　　05 - dimension (inch):02 for 0402, 03 0603, 05 0805, saidthat 06 represents 1206, 1210 1210, 1812 1812, said that10 represents 1210, 12 represents 2512.
　　The temperature coefficient is expressed as 100PPM K,
　　102－5% precision resistance representation: the top twoeffective digital, third said the number of zero, the basic unit is the Omega, Omega 102 = 10000 = 1K. 1002 is the 1%value representation: the top three effective digital, fourthsaid the number of zero, the basic unit is the Omega,Omega 1002 = 10000 = 10K.
　　J said the accuracy of 5%, accuracy of 1% F -representation.
　　T said the tape packaging
　　SMD resistor error accuracy is ± 1%, ± 2%, ± 5%, ± 10% accuracy, routine use is the most ± 1% and ± 5%,
　　± 5% precision conventional uses three bits to representcases 512, the first two is a valid number, third digit 2 indicates how many zero, the basic unit is the Omega, whichis 5100 euro, 1000 Ω = 1K Ω, 1000000 Ω =1M
　　In order to distinguish between ± 5%, resistance ± 1%, and ± 1% resistance of conventional most with 4 bits to represent,
　　It is said that before the three significant digits, fourth saidthe number of zero 4531 or 4530 Ω, also be equal to 4.53K
　　SMD resistor to buy
　　Surface mount technology (SMT) has been widely used,electronic product assembly using the SMT ratio has exceeded 90%. China began to use the SMT from the eighty‘s. With the development of small SMT production equipment, the scope of application of SMT in the further expansion, aviation, aerospace, instrumentation, machine tools and other areas in the use of SMT production of various batch small electronic products or components.
　　In recent years, in addition to electronic product development personnel with the patch type devices and development of new products, repair personnel also began to repair the SMT assembly of electronic products. This paper will introduce the capacitor and the inductor resistor,the largest application amount of main parameters and specifications, in order to developers, repair personnel to choose the SMD components help.
　　At present, SMD resistor models are not unified, set by the manufacturers themselves, and particularly long (by type
　　Fixed chip resistors, translated directly from the Chip FixedResistor, commonly known as the chip resistor (SMDResistor), is a kind of metal glass uranium in the resistor.The mixed metal powder and glass powder with uranium,resistors made screen printing on the substrate. Moisture.Moisture resistance, high temperature, low temperature coefficient. (Note: the following fixed chip resistors arecalled chip resistor)
　　SMD resistor classification
　　SMD resistor is divided into the following categories:
　　Classification of reference international
　　Regular series of thick film chip resistors
　　General purpose General purpose, 0201 - 0805
　　General purpose, 1206 - 2512
　　High precision and high stability of chip resistor
　　High precision - high stability High precision high stability,0201 - 0603
　　High precision - high stability, 0805 - 1210
　　High precision - high stability, 2010 - 2512
　　The regular series resistor
　　General purpose thin film General purpose thin film, 0201-2512
　　Low resistance chip resistor
　　Low ohmic Low ohmic, 0402 - 1206
　　Low ohmic, 2010 - 2512
　　Resistor array
　　Arrays Arrays, convex and concave
　　Patch current sensor
　　SMD current sensors Current Sensors - Low TCR
　　SMD resistor network
　　Network Network, T-type and L-type
　　Chip resistors packaging and dimensions
　　Packaging and size SMD resistor as shown in the following table:
　　Inch (MIL) metric (mm) long (L) (mm) wide (W) (mm) and high (T) (mm) a (mm) B (mm)
　　20106030.60 ± 0.05, 0.30 ± 0.05 and 0.23 ± 0.05, 0.10 ±0.05 and 0.15 ± 0.05
　　40210051 ± 0.10, 0.50 ± 0.10 and 0.30 ± 0.10, 0.20 ± 0.10 and 0.25 ± 0.10
　　60316081.60 ± 0.15, 0.80 ± 0.15 and 0.40 ± 0.10, 0.30 ±0.20 and 0.30 ± 0.20
　　80520122 ± 0.20, 1.25 ± 0.15 and 0.50 ± 0.10, 0.40 ± 0.20 and 0.40 ± 0.20
　　120632163.20 ± 0.20, 1.60 ± 0.15 and 0.55 ± 0.10, 0.50 ±0.20 and 0.50 ± 0.20
　　121032253.20 ± 0.20, 2.50 ± 0.20 and 0.55 ± 0.10, 0.50 ±0.20 and 0.50 ± 0.20
　　181248324.50 ± 0.20, 3.20 ± 0.20 and 0.55 ± 0.10, 0.50 ±0.20 and 0.50 ± 0.20
　　201050255 ± 0.20, 2.50 ± 0.20 and 0.55 ± 0.10, 0.60 ±0.20 and 0.60 ± 0.20
　　251264326.40 ± 0.20, 3.20 ± 0.20 and 0.55 ± 0.10, 0.60 ±0.20 and 0.60 ± 0.20
　　The relationship between packaging and power resistors
　　Packaging and power SMD resistor as shown in the following table:
　　Package rated @ 70 ° C maximum working voltage (V) inch(MIL) metric (mm) normal power to improve the power series
　　02010603 1/20W / 25
　　04021005 1/16W / 50
　　06031608 1/16W 1/10W 50
　　08052012 1/10W 1/8W 150
　　12063216 1/8W 1/4W 200
　　12103225 1/4W 1/3W 200
　　18124832 1/2W / 200
　　20105025 1/2W 3/4W 200
　　25126432 1W / 200
　　Note: voltage = √ power X resistance (P=V2/R) is smaller or the maximum working voltage of the two values
　　Characteristics of chip resistor
　　And has the advantages of small volume, light weight;
　　· suit for reflow and wave soldering;
　　· stable performance, high reliability;
　　· low assembly cost, and automatic SMT equipment;
　　· high mechanical strength, superior high frequencycharacteristics.
　　Nomenclature for the chip resistor
　　Nomenclature for domestic chip resistor:
　　Name 1, accuracy of 5%: RS-05K102JT
　　Name 2, accuracy of 1%: RS-05K1002FT
　　R said resistance
　　S said the power of 0402 is 1/16W, 0603 1/10W, 08051/8W, 1206 1/4W, 1210 1/3W, 1812 1/2W, 2010 3/4W,2512 1W.
　　05 - dimension (inch):02 for 0402, 03 0603, 05 0805, saidthat 06 represents 1206, 1210 1210, 1812 1812, said that10 represents 1210, 12 represents 2512.
　　The temperature coefficient is expressed as 100PPM K,
　　102－5% precision resistance representation: the top twoeffective digital, third said the number of zero, the basic unit is the Omega, Omega 102 = 10000 = 1K. 1002 is the 1%value representation: the top three effective digital, fourthsaid the number of zero, the basic unit is the Omega,Omega 1002 = 10000 = 10K.
　　J said the accuracy of 5%, accuracy of 1% F -representation.
　　T said the tape packaging
　　SMD resistor error accuracy is ± 1%, ± 2%, ± 5%, ± 10% accuracy, routine use is the most ± 1% and ± 5%,
　　± 5% precision conventional uses three bits to representcases 512, the first two is a valid number, third digit 2 indicates how many zero, the basic unit is the Omega, whichis 5100 euro, 1000 Ω = 1K Ω, 1000000 Ω =1M
　　In order to distinguish between ± 5%, resistance ± 1%, and ± 1% resistance of conventional most with 4 bits to represent,
　　It is said that before the three significant digits, fourth saidthe number of zero 4531 or 4530 Ω, also be equal to 4.53K
　　SMD resistor to buy
　　Surface mount technology (SMT) has been widely used,electronic product assembly using the SMT ratio has exceeded 90%. China began to use the SMT from the eighty‘s. With the development of small SMT production equipment, the scope of application of SMT in the further expansion, aviation, aerospace, instrumentation, machine tools and other areas in the use of SMT production of various batch small electronic products or components.
　　In recent years, in addition to electronic product development personnel with the patch type devices and development of new products, repair personnel also began to repair the SMT assembly of electronic products. This paper will introduce the capacitor and the inductor resistor,the largest application amount of main parameters and specifications, in order to developers, repair personnel to choose the SMD components help.
　　At present, SMD resistor models are not unified, set by the manufacturers themselves, and particularly long (by type