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SMT零件識别(SMT Components Distinguish)
SMT零件識别(SMT Components Distinguish)(3)
(1) 一般電阻:其阻值以4條色碼表示, 前2碼表示底數, 第3碼爲乘數, 第4碼爲此電阻之最大(dà)誤差值。
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.
其阻值爲: 10*105 = 1000000 ohm = 1M ohm, 誤差值爲±5% = ±50K ohm
The resistor value is: 10*105 = 1000000 ohm = 1M ohm, Error is ±5% = ±50K ohm.
其阻值爲: 60*100 = 60 ohm, 誤差值爲±10% = ±6 ohm
The resistor value is: 60*100 = 60 ohm, Error is ±10% = ±6 ohm.
(2) 精密電阻:其阻值以5條色碼表示, 前3碼表示底數, 第4碼爲乘數, 第5碼爲此電阻之最大(dà)誤差值。
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.
其阻值爲: 100*104 = 1000000 ohm = 1M ohm, 誤差值爲±1% = ±10K ohm.
The resistor value is: 100*104 = 1000000 ohm = 1M ohm, Error is ±1% = ±10 K ohm.
其阻值爲: 620*102 = 62000 ohm = 62K ohm, 誤差值爲±1% = ±620 ohm.
The resistor value is: 620*102 = 62000 ohm = 62K ohm, Error is ±1% = ±620 ohm.
(3) 0 奧姆電阻, 其色碼之标示爲:
二 電容(Capacitor):
電容的(de)标示方法較不統一, 一般而言電解質電容的(de)電容量會直接标示在電容上, 有些電容則會用(yòng)下(xià)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:
電容的(de)耐壓值(單位: 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
電容的(de)電容量(單位: pF)
Capacitor value(Unit: pF):
0 1 2 3 4 5 6 7 8 9
底數 0 1 2 3 4 5 6 7 8 9
乘數 100 101 102 103 104 105 106 107 108 109
電容的(de)誤差(單位: pF)
Maximum error(Unit: pF):
B C D F G J K M N V X Z P
容許誤差(%) ±0.1 ±0.25 ±0.5 ±1 ±2 ±5 ±10 ±20 ±30 ±20 ±40 ±80 ±100
耐壓強度爲400 volt
電容量爲10*103 = 10000 pF = 10K pF,
誤差值爲±20% = ±2K pF.
Maximum used voltage is 400 volt.
Capacitor value is 10*103 = 10000 pF = 10K pF,
Maximum error is ±20% = ±2K pF.