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SMT零件识别(SMT Components Distinguish)
SMT零件识别(SMT Components Distinguish)(3)
(1) 一般电阻:其阻值以4条色码表示, 前2码表示底数, 第3码为乘数, 第4码为此电阻之最大误差值。
Ordinary resistor: Using 4 color bars to represent resistor value, the first 2 bars refer to base, the 3rd bar is times, the 4th bar is error value.
其阻值为: 10*105 = 1000000 ohm = 1M ohm, 误差值为±5% = ±50K ohm
The resistor value is: 10*105 = 1000000 ohm = 1M ohm, Error is ±5% = ±50K ohm.
其阻值为: 60*100 = 60 ohm, 误差值为±10% = ±6 ohm
The resistor value is: 60*100 = 60 ohm, Error is ±10% = ±6 ohm.
(2) 精密电阻:其阻值以5条色码表示, 前3码表示底数, 第4码为乘数, 第5码为此电阻之最大误差值。
Precise resistor: Using 5 color bars to represent resistor value, the first 3 bars refer to base, the 4th bar is times, the 5th bar is error value.
其阻值为: 100*104 = 1000000 ohm = 1M ohm, 误差值为±1% = ±10K ohm.
The resistor value is: 100*104 = 1000000 ohm = 1M ohm, Error is ±1% = ±10 K ohm.
其阻值为: 620*102 = 62000 ohm = 62K ohm, 误差值为±1% = ±620 ohm.
The resistor value is: 620*102 = 62000 ohm = 62K ohm, Error is ±1% = ±620 ohm.
(3) 0 奥姆电阻, 其色码之标示为:
二 电容(Capacitor):
电容的标示方法较不统一, 一般而言电解质电容的电容量会直接标示在电容上, 有些电容则会用下列代号标示:
Capacitor value representation method is not standardized. Some types of capacitor will show capacitor value directly in capacitor surface, some others will use below symbols to transmit capacitor value:
电容的耐压值(单位: V)
Maximum voltage to be used(Unit: V)
A B C D E F G H I J
0 1 1.25 1.6 2 2.5 3.15 4 5 6.3 8
1 10 12.5 16 20 25 31.5 40 50 63 80
2 100 125 160 200 250 315 400 500 630 800
3 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000
电容的电容量(单位: pF)
Capacitor value(Unit: pF):
0 1 2 3 4 5 6 7 8 9
底数 0 1 2 3 4 5 6 7 8 9
乘数 100 101 102 103 104 105 106 107 108 109
电容的误差(单位: pF)
Maximum error(Unit: pF):
B C D F G J K M N V X Z P
容许误差(%) ±0.1 ±0.25 ±0.5 ±1 ±2 ±5 ±10 ±20 ±30 ±20 ±40 ±80 ±100
耐压强度为400 volt
电容量为10*103 = 10000 pF = 10K pF,
误差值为±20% = ±2K pF.
Maximum used voltage is 400 volt.
Capacitor value is 10*103 = 10000 pF = 10K pF,
Maximum error is ±20% = ±2K pF.