About Transistors

Transistors

A transistor is a semiconductor device that is commonly used to amplify or switch electronic signals. It consists of three terminals, normally referred to as the emitter, base and collector. The transistor operates in four main states: cutoff, forward active, reverse active and saturation. It acts as an electrical switch when forward biased, meaning a current is allowed to flow between the two terminals. When it is reverse biased, meaning the current flows in the opposite direction, the device is turned off. Transistors are used in amplifying circuits to amplify voltage, current, or even power. They are also used in digital logic circuits to switch between two or more stable states.
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MMJT9435T1


MMJT9435T1G (ROHS COMPLIANT) NPN BIPOLAR 3A 30V SOT223
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ON Semiconductor Availability : 1940
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USD 0.2209

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PN4118


JFET SWITCH N-CHAN TO-92 ELECTRONICS PART
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ON Semiconductor Availability : 1891
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USD 0.1344

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714865GB


USE BC847C/215
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Taiwan Semiconductor Availability : 1807
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USD 0.0161

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BFS20/T1


BFS20/T1 MOVED TO 013556BB T/HOLE
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NXP Availability : 1740
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USD 0.1171

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BC868/115


BC868/115 SOT-89 1A 20V TRANS T/R SMD
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NXP Availability : 1649
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USD 0.1958

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MPSA63ZL1


MPSA63ZL1 MPSA63ZL1 T/HOLE
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ON Semiconductor Availability : 1548
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USD 0.0409

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IRF640N


IRF640N HEXFET
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Infineon Availability : 1496
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USD 0.4082

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ULN2003ADR/CUT


ULN2003ADR Reel DARLINGTON DRIVER SO-16 SMD
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Texas Instruments Availability : 1224
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USD 0.3062

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FMMT591ATA


FMMT591ATA TRANSISTORS SOT 23
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Diodes Incorporated Availability : 1215
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USD 0.388

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Hot 2N5210


Transistors Bipolar - BJT NPN Gen Pur SS
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Central Semiconductor Availability : 1191
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USD 0.0493

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Hot NTGS3443T1G


MOSFET 20V 2A P-Channel
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ON Semiconductor Availability : 1067
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USD 0.0869

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Hot 2N4403


Transistors Bipolar - BJT PNP Gen Pur SS
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Central Semiconductor Availability : 1056
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USD 0.0241

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NTD3055L104T4G


ON Semiconductor MOSFET 60V 12A N-Channel
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ON Semiconductor Availability : 1018
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USD 0.25

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BC547BTA


Transistor: NPN; bipolar; 45V; 0.1A; 500mW; TO92
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Generic Availability : 989
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USD 0.0281

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BC640/116


BC640/116 Reel T092 PNP 80V ON RADIAL Reel T/
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Philips Availability : 975
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USD 0.1653

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BCX71H/T1


BCX71H/T1 SOT23 S.S TRANSIST SMD
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ROHM Availability : 970
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USD 0.0306

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BD132


BD132 PNP TO126 45V 3A POWER T RANS
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Philips Availability : 969
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USD 0.6027

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2N4124


2N4124 TRANSISTOR T/HOLE
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Central Semiconductor Availability : 873
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USD 0.0597

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VN1206L


VN1206L TRANSISTOR
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Teccor Availability : 781
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USD 0.9356

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BAX18/A52R


BAX18/A52R AXIAL SWITCH DIODE T/HOLE
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Philips Availability : 776
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USD 0.0679

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