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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BC817-40W,115


Bipolar (BJT) Transistor NPN 45 V 500 mA 100MHz 200 mW Surface Mount SOT-323
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Nexperia Availability : 83683
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USD 0.0101

Multiples of: 20

CMKDM8005 TR


MOSFET DUAL P-CHANNEL MOSFET
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Central Semiconductor Availability : 37769
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USD 0.1878

Multiples of: 1

MMBT3906FZ-7B


Diodes Incorporated Bipolar Transistors - BJT PNP 40Vceo 0.3W 250mW 250MHz
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Diodes Incorporated Availability : 37746
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USD 0.1311

Multiples of: 1

SI3442BDV-T1-E3


TSOP-6-1.5mm MOSFETs ROHS
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Vishay Availability : 37729
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USD 0.215

Multiples of: 1

MPSA42


Transistors (NPN/PNP) NPN 500mA 300V TO-92 RoHS
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Blue Rocket Availability : 37726
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USD 0.018

Multiples of: 20

SI3437DV-T1-BE3


MOSFET P-CHANNEL 150-V (D-S)
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Vishay Availability : 37713
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USD 0.4616

Multiples of: 1

S8050


Transistors (NPN/PNP) NPN 500mA 25V SOT-23 (SOT-23-3) RoHS
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Bourne Availability : 37612
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USD 0.0083

Multiples of: 50

SMUN5114T3G


Trans Digital BJT PNP 50V 100mA Automotive 3-Pin SC-70 T/R
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ON Semiconductor Availability : 37586
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USD 0.0223

Multiples of: 1

RN1705,LF


Bipolar Transistors - Pre-Biased NPN x 2 BRT Q1BSR=2.2kOhm Q1BER=47kOhm Q2BSR=2.2kOhm Q2BER=47kOhm VCEO=50V IC=0.1A
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Toshiba Availability : 37563
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USD 0.0336

Multiples of: 1

NSVS50030SB3T1G


Bipolar Transistors - BJT BIP PNP 3A 50V FOR AUTO
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ON Semiconductor Availability : 37548
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USD 0.215

Multiples of: 1

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