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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MMBT3904,215


Bipolar (BJT) Transistor NPN 40 V 200 mA 300MHz 250 mW Surface Mount TO-236AB
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Nexperia Availability : 808980
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USD 0.0093
Multiples of: 3000

S9013 J3


Transistors (NPN/PNP) NPN 500mA 25V SOT-23 (SOT-23-3) RoHS
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Changjiang Availability : 662486
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USD 0.0093
Multiples of: 50

S8550


25V 300mW 120@50mA,1V 500mA PNP SOT-23 Bipolar Transistors - BJT ROHS
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HXY MOS Availability : 526880
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USD 0.0035
Multiples of: 50

SQ2389ES-T1_BE3


MOSFET P-CHANNEL 40V D-S
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Vishay Availability : 525895
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USD 0.2495
Multiples of: 1

FMMT449TA


Bipolar (BJT) Transistor NPN 30 V 1 A 150MHz 500 mW Surface Mount SOT-23-3
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Diodes Incorporated Availability : 517980
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USD 0.122
Multiples of: 3000

2N7002K


New Quadratic Unclassified Data SOT-23 RoHS
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Microdiode Electronics Availability : 516839
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USD 0.0074
Multiples of: 30

DNLS320E-13


Diodes Incorporated Bipolar Transistors - BJT NPN 1W
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Diodes Incorporated Availability : 516525
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USD 0.2032
Multiples of: 2500

S8550


Transistors (NPN/PNP) PNP 500mA 25V SOT-23 (SOT-23-3) RoHS
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Hottech Availability : 511923
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USD 0.0049
Multiples of: 50

DMG7401SFGQ-7


MOSFET P-Ch Enh Mode FET 30Vdss 25Vgss
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Diodes Incorporated Availability : 510506
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USD 0.2521
Multiples of: 1

BC847BPN,135


NXP Semiconductors Bipolar Transistors - BJT TRANS DOUBLE TAPE-11
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Nexperia Availability : 505493
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USD 0.0241
Multiples of: 1

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