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電阻 Resistor

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Resistor Series SINLOON®
Description: Carbon Film - CFR Description: Cement Resistor - CM Description: Fixed Power - HPD
Power: 1/16W ~ 3W Power: 2W ~ 50W Power: 10W ~ 3KW
Resistance: 1R ~ 10M Ω Resistance: 0.1R ~ 47K Ω Resistance: 0.5R ~ 800K Ω
Tolerance: ±5% Tolerance: ±5% Tolerance: ±5%
碳膜電阻 水泥電阻 電力型功率電阻
Description: Metal Film - FML Description: Metal Film - FMF Description: Carbon Film - FCR
Power: 1/4W ~ 2WS Power: 2W ~ 50W Power: 1/4W - 3W
Resistance: 0.1R ~ 0.99 Ω Resistance: 10R ~ 1M Ω Resistance: 1R ~ 10M Ω
Tolerance: ±1%, ±5% Tolerance: ±1%, ±5% Tolerance: ±5%
低阻值不燃性金屬膜電阻 金屬膜電阻 不燃性碳膜電阻
Description: Forming Type Description: Fuse Resistor - FR Description: Heat Resistor - HWW
Power: 1/8W ~ 5W Power: 1/4W ~ 3WS Power: 1/2W - 10W
Resistance: Resistance: 1R ~ 1K Ω Resistance: 1R ~ 1K Ω
Tolerance: Tolerance: ±2%, ±5% Tolerance: ±5%
成型電阻 保險絲電阻 繞線發熱電阻
Description: Metal Film - HPMF Description: MELF Carbon - MCF Description: MELF Metal - MMF
Power: 1/4W ~ 1W Power: 1/8W ~ 3WS Power: 1/8WS ~ #WS
Resistance: 10R ~ 10M Ω Resistance: 1R ~ 10M Ω Resistance: 1R ~ 10M Ω
Tolerance: ±0.05%, ±1% Tolerance: ±5% Tolerance: ±1%, ±5%
高精密金屬膜電阻 碳膜晶圓電阻 金屬膜晶圓電阻
Description: Metal Surge - MAS Description: MELF Dimension Description: MELF Glaze - MMG
Power: 1/8W ~ 3W Power: Power: 1/4W ~ 3W
Resistance: 10R ~ 1G Ω Resistance: Resistance: 100K ~ 1M Ω
Tolerance: ±5%, ±10%,±20% Tolerance: Tolerance: ±1%,±2% ,±5%,±10%
脈衝型晶圓電阻(高壓) 保險絲晶圓電阻 玻璃釉高壓晶圓電阻
Description: High Ohm - MGHO Description: MELF Fuse - FRM Description: MELF Glaze - MMG
Power: 1/8W ~ 2WS Power: 1/8W ~ 3WS Power: 1/4W ~ 3W
Resistance: 100K ~ 50GK Ω Resistance: 1R ~ 5K Ω Resistance: 100K ~ 1M Ω
Tolerance: ±0.1%,±25%,±0.5% Tolerance: ±2%,±5% Tolerance: ±1%,±2% ,±5%,±10%
高精密金屬膜晶圓電阻 保險絲晶圓電阻 玻璃釉高壓晶圓電阻
Description: Small Precision - SPM Description: Molding Res.-HPMD Description: Metal Film - HPMF
Power: 1/8W ~ 4Wu Power: 1/4W - 1/2W Power: 1/4W-1W
Resistance: 10R ~ 1M Ω Resistance: 10R ~ 1M Ω Resistance: 10R ~ 1M Ω
Tolerance: ±0.1%,±25%,±0.5% Tolerance: ±0.02%,±0.05%,±0.1% Tolerance: ±0.05%.
小型化高精密金屬膜電阻 模壓高精密金屬膜電阻 高精密金屬膜電阻
Description: Zero Ohm - Jumper Description: Surge Resistor - SUR Description: Glezed Resistor - MG
Power: 1/8W ~ 2W Power: 1/2W ~ 2W Power: 1/8W~3WS
Resistance: Zero ohm Resistance: 3.3R ~ 1M Ω Resistance: 50K ~ 10G Ω
Tolerance: Tolerance: ±5%,±10%,±20% Tolerance: ±0.5%,±1%,±5%,±10%
零歐姆及跳線 脈衝型高壓電阻 玻璃釉(金屬)高壓高阻值電阻器
Description: Wire wound - WWR Description: Ultra Metal - UMR Description: Precision Metal - PMF
Power: 1/2W ~ 15W Power: 0.4W ~ 3W Power: 1/8W ~ 3WS
Resistance: 0.1R ~ 4.7K Ω Resistance: 1R ~ 10M Ω Resistance: 0.1R ~ 1M Ω
Tolerance: ±1%,±5%,±10% Tolerance: ±1%,±2%,±5% Tolerance: ±0.1%,±0.25%,±0.5%
繞線電阻 超小型化金屬膜電阻 高精密金屬膜電阻
Description: Metal Oxide  - MOS Description: Metal Film - MFS Description: Metal Film - MFR
Power: 1/2WS ~ 7WS Power: 1/4WS ~ 2W Power: 1/4WS ~ 2W
Resistance: 1R ~ 510K Ω Resistance: 0.1R ~ 100K Ω Resistance: 0.1R ~ 100K Ω
Tolerance: ±2%,±5%,±10% Tolerance: ±1%,±2%,±5% Tolerance: ±1%,±5%.
小型化氧化膜電阻器 小型化高精密金屬膜電阻器 金屬膜電阻
Description: Carbon Film - CRS Description: Network - NR Description: TO-220 Resistor - ML
Power: 1/4WS ~ 3WS Power: 1/8W~1/4W (5-16pin) Power: 18W ~ 100W
Resistance: 1R ~ 1M Ω Resistance: 10R ~ 1M Ω Resistance: 0.1R ~ 1M Ω
Tolerance: ±5%,±10% Tolerance: ±2%,±5% Tolerance: ±1%,±5%.
小型化碳膜電阻器 排列電阻(排阻) TO-220 / TO-247 功率電阻
Description: Metal Alloy - PVR Description: Chip Array - CRA Description: Color Code (E24/E96)
Power: 1W ~ 10W Power: 1/8W~1/4W (4R/8pin) Power: Standard
Resistance: 5m ~ 300m (0.005R) Resistance: 10R ~ 1M Ω Resistance: Full Series
Tolerance: ±0.1% ~ ±5% Tolerance: ±2%,±5% Tolerance: Full Series
高精密模壓無感合金電阻 貼片型排列電阻(排阻) 標準電阻色碼及其它代碼表示法參考資料

Resistor  

最近更新在 週六, 21 十一月 2015 02:01  
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半導體二極管基礎及檢測方法

 產品應用  半導體二極管基礎及檢測方法:

1.二極體的主要參數            
正向電流IF:在額定功率下,允許通過二極體的電流值。       
正向電壓降VF:二極體通過額定正向電流時,在兩極間所産生的電壓降。     
最大整流電流(平均值)IOM:在半波整流連續工作的情況下,允許的最大半波電流的平均值。  
反向擊穿電壓VB:二極體反向電流急劇增大到出現擊穿現象時的反向電壓值。    
正向反向峰值電壓VRM:二極體正常工作時所允許的反向電壓峰值,通常VRM爲VP的三分之二或略小一些。 
反向電流IR:在規定的反向電壓條件下流過二極體的反向電流值。       
結電容C:電容包括電容和擴散電容,在高頻場合下使用時,要求結電容小於某一規定數值。    
最高工作頻率FM:二極體具有單向導電性的最高交流信號的頻率。       
              
開關二極體             
在脈衝數位電路中,用於接通和關斷電路的二極體叫開關二極體,它的特點是反向恢復時間短,能滿足高頻和超頻應用的需要。
開關二極體有接觸型,平面型和擴散臺面型幾種,一般IF<500毫安培的矽開關二極體,多採用全密封環氧樹脂,陶瓷片狀封裝,
如圖所示 陶瓷片狀二極管           

2.二極體的選用常識              
選用二極管要注意的幾個方面:             
(1)正向特性                
另在二極體兩端的正向電壓(P爲正、N爲負)很小時(鍺管小於0.1伏,矽管小於0.5伏),管子不導通處於“死區”狀態,當正向電壓起過
一定數值後,管子才導通,電壓再稍微增大,電流急劇暗加。不同材料的二極體,起始電壓不同,矽管爲0.5-.7伏左右,鍺管 
爲0.1-0.3左右。              
                
(2)反向特性               
  二極體兩端加上反向電壓時,反向電流很小,當反向電壓逐漸增加時,反向電流基本保持不變,這時的電流稱爲反向飽和電流.
不同材料的二極體,反向電流大小不同,矽管約爲1微安到幾十微安,鍺管則可高達數百微安,另外,反向電流受溫度變化 
的影響很大,鍺管的穩定性比矽管差。           
                
(3)擊穿特性              
  當反向電壓增加到某一數值時,反向電流急劇增大,這種現象稱爲反向擊穿。這時的反向電壓稱爲反向擊穿電壓,
不同結構、工藝和材料製成的管子,其反向擊穿電壓值差異很大,可由1伏到幾百伏,甚至高達數千伏。  
                
(4)頻率特性              
由於結電容的存在,當頻率高到某一程度時,容抗小到使PN結短路。導致二極體失去單向導電性,不能工作,PN結面積越大,
結電容也越大,越不能在高頻情況下工作。           
                
3. 二極體檢測方法              
1.普通二極體的檢測               
  二極體的極性通常在管殼上注有標記,如無標記,可用萬用表電阻檔測量其正反向電阻來判斷(一般用R×100或×1K檔)具體方法如表一。