Product name representation
Monolithic ceramic capacitor
(Product Name) GR M 18 8 R7 1C 225 K E15 D
GRM———— indicates tin-plated electrode products (ordinary chip ceramic capacitors)
The commonly used Murata capacitors are GRM common chip ceramic capacitors and GNM ordinary chip capacitors.
18 ————Represents the size (length * width) (1.6 * 0.8mm)
The domestic common size is (length * width) 1.6 * 0.8mm (unit is mm). The international common size is expressed in inches 0603 (in inches),
The common codes of Murata are 03, 15, 18, 21, 31, 32, 42, 43, 55, etc. The specific corresponding values are as follows:
03----0.6*0.3mm----0201 15----1.0*0.5mm----0402 18----1.6*0.8mm----0603
21----2.0*1.25mm----0805 31----3.2*1.6mm----1206 32----3.2*1.5mm----1210
42----4.5*2.0mm----1808 43----4.5*3.2mm----1812 55----5.7*5.0mm----2220
8 ———— Indicates thickness (T) (0.8mm)
Commonly used thickness Murata codes are 5, 6, 8, 9, B, C, E, etc. The specific corresponding values are as follows:
5----0.5mm 6----0.6mm 8----0.8mm 9----0.9mm B----1.25mm C----1.6mm E----2.5mm
R7 ———— indicates material (X7R)
Commonly used materials Murata code has 5C, R6, R7, F5, etc. The specific corresponding values are as follows:
5C----COG/NPO/CH R6----X5R R7----X7R F5-----Y5V
5C working temperature is -55 degrees - +125 degrees, temperature coefficient is 0 + -30ppm / kWh;
R6 working temperature is -55 degrees - +85 degrees, the temperature coefficient is +-15%;
R7 operating temperature is -55 degrees - +125 degrees, the temperature coefficient is +-15%;
The F5 operating temperature is -30 degrees - +85 degrees. Temperature coefficient is +22, -82%
The small capacitance value below 100pf is generally made of 5C material, 100PF - 1uf is generally made of R7 material, 1uf is generally made of R6 material, and the precision requirement is not high, generally F5 material is used. The choice of material directly affects the accuracy and temperature resistance of the capacitor value.
1C ———— indicates rated voltage (DC16V)
Commonly used voltage Murata indicates 0J, 1A, 1C, 1E, 1H, etc. The corresponding values are as follows:
0J------6.3V 1A------10V 1C------16V 1E------25V 1H------50V
225———— indicates electrostatic capacity (22UF)
It is represented by 3 alphanumeric characters and the unit is picofarad (pF). The first and second digits are significant digits, the third digit indicates the number of zeros after the significant digit, and the decimal point is indicated by the capital letter "R", in which case all digits are significant digits.
For example: R50 means 0.50, that is, 0.5pF; 1R0 means 1.0pF; 101 means 100pF (that is, the first 2 digits are 10 significant digits. The 3rd digit is the first 10 significant digits, and 0 is 0. That is 100pF. )
1 microfarad (UF) = 1000 nanofarads (NF) 1 nanofarad (NF) = 1000 picofarads (pF)
K ———— indicates the allowable deviation of the electrostatic capacity, that is, the gear position and accuracy (+-10%)
Common gears are B, C, D, J, K, M, Z. The corresponding values are as follows:
B=+-0.1pF C=+-0.25pF D=+-0.5pF J=+-5% K=+-10% M=+-20% Z=+80,-20%
The accuracy of normal 5C material can be B, C, D, J files; the accuracy of R6 and R7 materials can be K and M files; the accuracy of F5 material is Z file.
E15————Individual specification code (can be ignored, not important)
D ————Packing method (diameter 180mm tape tape)
Commonly used packaging methods are L, D, B, etc. The specific methods are as follows:
L denotes an embossed tape (plastic) tape having a diameter of 180 mm; D denotes a 180 mm diameter tape tape; and B denotes a loose bag.
Murata inductance knowledge
Murata inductance is divided into: LQG multi-layer type (air core line); LQH winding type (ferrite core); LQW winding type (air core line); LQM multi-layer type (ferrite core) ; LQP film type, a total of five types.
The product name representation is as follows:
Chip coil
LQ H 32 M N 331 K 2 3 L 1 2 3 4 5 6 7 8 9 10
1: model number;
LQ means chip coil
2: structure;
G-------multi-layer type (air core);
H-------winding type (ferrite core);
M------- winding type (air core);
P-------film type;
W-------winding type (air core);
3: Application and features;
Code Series Name Application and Features
H LQG multi-layer air core
N LQM resonant circuit
D LQM for turbulence (small current DC power supply)
F LQM for turbulence (DC power supply)
M LQP film type
T LQP film type (low DC resistance type)
A LQW high Q type (for general frequency)
H LQW high Q type (high frequency)
N LQH resonant circuit
M LQH resonant circuit (coated type)
D LQH for turbulence
C LQH turbulent (coated type)
S LQH for turbulence (electromagnetic shielding type)
H LQH high frequency resonant circuit
4: type;
N/S---------Standard type
5: inductance value;
It is represented by three digits and the unit is Weiheng (uH). The second digit of the first digit is a significant digit, and the third digit represents the number of zeros following the first two digits. If there is a decimal point, it is represented by the capital letter "R". In this case all numbers are valid numbers. If the inductance value is less than 0.1uH, the inductance value is represented by a combination of two digits and the capital letter "N", and the unit of inductance value is nanohenry (nH).
331 means that there is a zero after 33, which is 330uH.
3R3 means that there is a decimal point, and R means a decimal point, which is 3.3uH.
3N3 means that the inductance value is less than 0.1uH, and N represents the decimal point. The unit is Naheng (nH), which is 3.3nH.
1 microhenry (uH) = 1000 nanohen (nH)
6: inductance value tolerance (precision / gear position);
B=+-0.1nH C=+-0.2nH D=+-0.5nH G=+-2% H=+-3% J=+-5% K=+-10% M=+-20%
N=+-30% S=+-0.3nH W=+-0.05nH
7: characteristics;
0-----Standard type, including series (LQG/LQP/LQW*1/LQM*2/LQH)
1-----High Q value/low DC resistance value, including series (LQWL1A/LQW18A/LQW2BH)
2-----Standard type, including series (LQH32C/LQH32M/LQH3KS)
3-----Low DC resistance value, including series (LQH32C)
5-----Thin type, including series (LQH32C/LQH3KS)
7-----High current type, including series (LQM21F)
*1: Does not include LQM21N series
*2: Excluding LQH32/LQH3K series
8: electrode;
Lead-free
0-------Zinc, including series (LQG18H/LQP03T/LQW/LQM)
2-------Zinc, including series (LQG15H/LQP (except LQP03T))
3-------Lead-free solder, including series (LQW/LQH)
4-------Gold, including series (LQP03T - 04)
9: packaging;
The same way as capacitor packaging.
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