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產(chǎn)品分類(lèi)

碳化硅肖特基二極管
- TO-220-2L(A)
肖特基二極管
- TO-220AB
- ITO-220AB
- SOD-323
- TO-247
- TO-263
- TO-252
超快恢復二極管
- TO-247PT/PTS
- TO-247AC
- TO-263
- TO-220
- DO-27
高壓二極管
整流器件
- 整流橋
  - ABS
  - MSB
  - DB
  - YBS
  - HBS
- 合金軟橋
  - RABS
  - RMSB
  - RDB
  - RYBS
  - RHBS
- 插件系列
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  - DO-27
- 整流開(kāi)關(guān)
- 肖特基橋
可控硅
- 雙向可控硅
- 單向可控硅
  - TO-92
  - TO-252
  - TO-220A
  - TO-3P
  - TO-247
  - TO-220
  - TO-126
MOSFET
- TO-220F
- TO-252
貼片系列
- SMB
- SMA
- SMC
- TO-277
- SMAF
- SMBF
線(xiàn)性穩壓器
- TO-92
- SOT-23
IGBT
- TO-247
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TO-252

車(chē)規級三極管，全稱(chēng)應為半導體三極管，也稱(chēng)雙極型晶體管、晶體三極管，是一種控制電流的半導體器件。其作用是把微弱信號放大成幅度值較大的電信號，也用作無(wú)觸點(diǎn)開(kāi)關(guān)。車(chē)規級三極管是半導體基本元器件之一，具有電流放大作用，是電子電路的核心元件。三極管是在一塊半導體基片上制作兩個(gè)相距很近的PN結，兩個(gè)PN結把整塊半導體分成三部分，中間部分是基區，兩側部分是發(fā)射區和集電區，排列方式有PNP和NPN兩種。

所屬分類(lèi)：

肖特基二極管

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產(chǎn)品描述

車(chē)規級三極管，全稱(chēng)應為半導體三極管，也稱(chēng)雙極型晶體管、晶體三極管，是一種控制電流的半導體器件。其作用是把微弱信號放大成幅度值較大的電信號，也用作無(wú)觸點(diǎn)開(kāi)關(guān)。

車(chē)規級三極管是半導體基本元器件之一，具有電流放大作用，是電子電路的核心元件。三極管是在一塊半導體基片上制作兩個(gè)相距很近的PN結，兩個(gè)PN結把整塊半導體分成三部分，中間部分是基區，兩側部分是發(fā)射區和集電區，排列方式有PNP和NPN兩種。

車(chē)規級三極管是在一塊半導體基片上制作兩個(gè)相距很近的PN結，兩個(gè)PN結把整塊半導體分成三部分，中間部分是基區，兩側部分是發(fā)射區和集電區，排列方式有PNP和NPN兩種。

從三個(gè)區引出相應的電極，分別為基極、發(fā)射極和集電極。發(fā)射區和基區之間的PN結叫發(fā)射結，集電區和基區之間的PN結叫集電結?；鶇^很薄，而發(fā)射區較厚，雜質(zhì)濃度大，PNP型車(chē)規級三極管發(fā)射區"發(fā)射"的是空穴，其移動(dòng)方向與電流方向一致，故發(fā)射極箭頭向里；NPN型車(chē)規級三極管發(fā)射區"發(fā)射"的是自由電子，其移動(dòng)方向與電流方向相反，故發(fā)射極箭頭向外。發(fā)射極箭頭指向也是PN結在正向電壓下的導通方向。硅晶體車(chē)規級三極管和鍺晶體車(chē)規級三極管都有PNP型和NPN型兩種類(lèi)型。

車(chē)規級三極管的封裝形式和管腳識別

常用車(chē)規級三極管的封裝形式有金屬封裝和塑料封裝兩大類(lèi)，引腳的排列方式具有一定的規律。國內各種類(lèi)型的晶體三極管有許多種，管腳的排列不盡相同，在使用中不確定管腳排列的三極管，需要進(jìn)行測量確定各管腳正確的位置，或查找晶體管使用手冊，明確車(chē)規級三極管的特性及相應的技術(shù)參數和資料。

晶體車(chē)規級三極管具有電流放大作用，其實(shí)質(zhì)是三極管能以基極電流微小的變化量來(lái)控制集電極電流較大的變化量。這是三極管基本的和重要的特性。我們將ΔIc/ΔIb的比值稱(chēng)為晶體三極管的電流放大倍數，用符號“β”表示。電流放大倍數對于某一只車(chē)規級三極管來(lái)說(shuō)是一個(gè)定值，但隨著(zhù)三極管工作時(shí)基極電流的變化也會(huì )有一定的改變。

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