BJT & Bipolar Transistors

A Bipolar Transistor or BJT (Bipolar Junction Transistor) is a solid state, three-pin device made from three layers of silicon. A BJT is designed to amplify current, bipolar transistors can also function as a switch. There are two main types of transistor, PNP (positive negative positive) or NPN (negative positive negative).How a Bipolar transistor is madeA bipolar transistor is made by joining two signal diodes back to back creating two PN junctions connected in series, sharing a common P or N terminal. By nature, silicon does not normally conduct electricity well. However, when silicon is treated with certain chemicals or impurities we can make the material and electrons behave in a different way. This process is called doping. The doping process improves the semiconductors ability to conduct electricity.What does a bipolar transistor do?As we said before a bipolar transistor has two possible functions, switching, and amplification. Due to the devices three layers of doped semiconductor material, supplying the transistor with a signal voltage enables the discrete component to act as an insulator or a conductor. This clever change provides the transistors with two basic functions, switching (digital) electronics or amplification (analog) electronics.Types of transistorTransistors are available in panel, surface and through hole mounting options in plastic package or metal can versions. All have three terminals or pins, the Base, the Collector, and the Emitter.Where are bipolar transistors used?Transistors are one of the most widely used discrete components in electronic designs and circuits. Transistors are used for the amplification of all types of electrical signals in circuits made up of individual components rather than ICs (integrated circuits).

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Description Price Transistor Type Maximum DC Collector Current Maximum Collector Emitter Voltage Package Type Mounting Type Maximum Power Dissipation Minimum DC Current Gain Transistor Configuration Maximum Collector Base Voltage Maximum Emitter Base Voltage Maximum Operating Frequency Pin Count Number of Elements per Chip Automotive Standard
RS Stock No. 738-7571
Mfr. Part No.2N2222ACSM
BrandSemelab
$27.21
Each
units
NPN 800 mA 40 V LCC 1 Surface Mount 500 mW 50 Single 75 V 6 V 250 MHz 3 1 -
RS Stock No. 177-5495
Mfr. Part No.2N2222ACSM
BrandSemelab
$31.513
Each (In a Tray of 100)
units
NPN 800 mA 40 V LCC 1 Surface Mount 500 mW 50 Single 75 V 6 V 250 MHz 3 1 -
RS Stock No. 177-5497
Mfr. Part No.2N2222ADCSM
BrandSemelab
$52.314
Each (In a Tray of 100)
units
NPN 800 mA 50 V LCC 2 Surface Mount 500 mW 50 Isolated 75 V 6 V 250 MHz 6 2 -
RS Stock No. 738-7575
Mfr. Part No.2N2222ADCSM
BrandSemelab
$57.53
Each
units
NPN 800 mA 50 V LCC 2 Surface Mount 500 mW 50 Isolated 75 V 6 V 250 MHz 6 2 -
RS Stock No. 737-8883
Mfr. Part No.MG9411-R
BrandSemelab
$10.96
Each
units
PNP 18 A 260 V TO-3P Through Hole 300 W 70 Single -260 V -5 V 35 MHz 3 1 -
RS Stock No. 738-7581
Mfr. Part No.2N2369ACSM
BrandSemelab
$48.02
Each
units
NPN 200 mA 15 V LCC 1 Surface Mount 360 mW 40 Single 40 V 4.5 V - 3 1 -
RS Stock No. 177-5498
Mfr. Part No.2N2369ACSM
BrandSemelab
$43.67
Each (In a Tray of 100)
units
NPN 200 mA 15 V LCC 1 Surface Mount 360 mW 40 Single 40 V 4.5 V - 3 1 -
RS Stock No. 177-5499
Mfr. Part No.2N2907ACSM
BrandSemelab
$20.435
Each (In a Tray of 100)
units
PNP 600 mA 60 V LCC 1 Surface Mount 500 mW 75 Single -60 V -5 V - 3 1 -
RS Stock No. 738-7584
Mfr. Part No.2N2907ACSM
BrandSemelab
$22.18
Each
units
PNP 600 mA 60 V LCC 1 Surface Mount 500 mW 75 Single -60 V -5 V - 3 1 -
RS Stock No. 738-7587
Mfr. Part No.2N2907ADCSM
BrandSemelab
$81.39
Each
units
PNP 600 mA 60 V LCC 2 Surface Mount 350 mW 50 Isolated -60 V -5 V - 6 2 -
RS Stock No. 177-5500
Mfr. Part No.2N2907ADCSM
BrandSemelab
$73.992
Each (In a Tray of 100)
units
PNP 600 mA 60 V LCC 2 Surface Mount 350 mW 50 Isolated -60 V -5 V - 6 2 -