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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MMBT5551


160V 300mW 100@10mA,5.0V 600mA NPN SOT-23 Bipolar Transistors - BJT ROHS
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hongjiacheng Availability : 213466
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USD 0.0064
Multiples of: 50

BC559CTA


Transistors Bipolar - BJT Transistor PNP Epitaxial Silicon
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ON Semiconductor Availability : 212600
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USD 0.0368
Multiples of: 1

Hot 2DA1971-7


Bipolar Transistors - BJT 400V PNP Trans 140Ic -100mA -0.5A
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Diodes Incorporated Availability : 212430
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USD 0.0949
Multiples of: 1000

BCR129E6327HTSA1


Trans Digital BJT NPN 50V 100mA Automotive 3-Pin SOT-23 T/R
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Infineon Availability : 211169
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USD 0.0452
Multiples of: 9294

BSS138


MOSFET SOT-23 N-CH LOGIC
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ON Semiconductor Availability : 209520
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USD 0.0231
Multiples of: 3000

2N7002


Transistor: N-MOSFET; TRENCH POWER MV; unipolar; 60V; 0.272A
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Yangjie Availability : 209442
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USD 0.0114
Multiples of: 20

MMBT4401


Bipolar Transistors - BJT SOT23 NPN 0.6A 40V G enPur
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Rectron Availability : 208359
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USD 0.0264
Multiples of: 1

AP2302B


MOSFET N Trench 20V 2.8A 1.2V @ 50uA 55 mΩ @ 2.8A,4.5V SOT-23 RoHS
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Quan Li Availability : 207980
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USD 0.0178
Multiples of: 50

BSH203,215


P-Channel 30 V 470mA (Ta) 417mW (Ta) Surface Mount TO-236AB
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Nexperia Availability : 207738
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USD 0.0828
Multiples of: 1

ULN2003D1013TR


Driver; darlington, transistor array; 0.5A; 50V; Channels:7; SO16
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STMicroelectronics Availability : 206196
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USD 0.0576
Multiples of: 5

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