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 made
A 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 transistor
Transistors 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).

...
Read more Read less

Filters

Viewing 41 - 60 of 3964 products
Results per page
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. 145-5537
Mfr. Part No.SS8050DTA
$0.065
Each (On a Tape of 2000)
units
NPN 1.5 A 25 V TO-92 Through Hole 1 W 40 Single 40 V 6 V - 3 1 -
RS Stock No. 125-0067
Mfr. Part No.MJ21194G
$8.07
Each (In a Tray of 100)
units
NPN 16 A 250 V TO-204 Through Hole 250 W 25 Single 400 V 5 V 4 MHz 3 1 -
RS Stock No. 545-0236
Mfr. Part No.MJ21194G
$11.14
Each
units
NPN 16 A 250 V TO-204 Through Hole 250 W 25 Single 400 V 5 V 4 MHz 3 1 -
RS Stock No. 125-0072
Mfr. Part No.MJE15030G
$2.02
Each (In a Tube of 50)
units
NPN 8 A 150 V TO-220AB Through Hole 50 W 20 Single 150 V 5 V 30 MHz 3 1 -
RS Stock No. 544-9680
Mfr. Part No.MJE15030G
$2.37
Each
units
NPN 8 A 150 V TO-220AB Through Hole 50 W 20 Single 150 V 5 V 30 MHz 3 1 -
RS Stock No. 124-1730
Mfr. Part No.BC547BTA
$0.051
Each (On a Reel of 2000)
units
NPN 100 mA 45 V TO-92 Through Hole 500 mW 200 Single 50 V 6 V 300 MHz 3 1 -
RS Stock No. 671-1113
Mfr. Part No.BC547BTA
$0.223
Each (In a Pack of 25)
units
NPN 100 mA 45 V TO-92 Through Hole 500 mW 200 Single 50 V 6 V 300 MHz 3 1 -
RS Stock No. 756-0622
Mfr. Part No.HN4B101J(TE85L,F)
BrandToshiba
$0.574
Each (In a Pack of 10)
units
NPN + PNP 1.2 A 30 V SMV Surface Mount 850 mW 125 Common Emitter -30 V, 50 V 7 (NPN) V, -7 (PNP) V - 5 2 -
RS Stock No. 803-1087
Mfr. Part No.BC547BTF
$0.123
Each (In a Pack of 200)
units
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS Stock No. 168-6170
Mfr. Part No.TIP32C
$0.744
Each (In a Tube of 50)
units
PNP 3 A 100 V TO-220 Through Hole 2 W 10 Single 100 V 5 V - 3 1 -
RS Stock No. 485-9777
Mfr. Part No.TIP32C
$0.884
Each (In a Pack of 5)
units
PNP 3 A 100 V TO-220 Through Hole 2 W 10 Single 100 V 5 V - 3 1 -
RS Stock No. 169-8610
Mfr. Part No.BC547BTF
$0.06
Each (On a Reel of 2000)
units
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS Stock No. 251-3564
Mfr. Part No.TIP35C
$3.10
Each
units
NPN 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS Stock No. 799-4817
Mfr. Part No.2SC5200-O(S1,F,S)
BrandToshiba
$3.864
Each (In a Pack of 5)
units
NPN 15 A 230 V TO-3PL Through Hole 150 W 35 Single 230 V 5 V 30 MHz 3 1 -
RS Stock No. 890-2682
Mfr. Part No.2SC5200-O(S1,F,S)
BrandToshiba
$4.666
Each (In a Pack of 5)
units
NPN 15 A 230 V TO-3PL Through Hole 150 W 35 Single 230 V 5 V - 3 1 -
RS Stock No. 168-6056
Mfr. Part No.TIP35C
$2.64
Each (In a Tube of 30)
units
NPN 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS Stock No. 739-0420
Mfr. Part No.FJP13009H2TU
$1.49
Each (In a Pack of 5)
units
NPN 12 A 400 V TO-220 Through Hole 100 W 6 Single 700 V 9 V - 3 1 -
RS Stock No. 145-5383
Mfr. Part No.PN2222ATA
$0.057
Each (On a Tape of 2000)
units
NPN 1 A 40 V TO-92 Through Hole 625 mW 35 Single 75 V 6 V 300 MHz 3 1 -
RS Stock No. 296-267
Mfr. Part No.MJ15003G
$11.04
Each
units
NPN 20 A 140 V TO-204AA Through Hole 250 W 25 Single 140 V 5 V 2 MHz 2 1 -
RS Stock No. 739-0381
Mfr. Part No.PN2222ATA
$0.27
Each (In a Pack of 10)
units
NPN 1 A 40 V TO-92 Through Hole 625 mW 35 Single 75 V 6 V 300 MHz 3 1 -
Related Products
Small Signal NPN Transistors, ON Semiconductor Standards Manufacturer ...
Description:
Small Signal NPN Transistors, ON Semiconductor Standards Manufacturer Part Nos with S or NSV prefix are automotive qualified to AEC-Q101 standard
Small Signal NPN Transistors, 40V to 50V, Fairchild ...
Description:
Small Signal NPN Transistors, 40V to 50V, Fairchild Semiconductor Bipolar Junction Transistors (BJT) broad range provides complete solutions for various circuit application needs. Innovative packages are designed for minimal size, highest reliability and maximum thermal performance.
Dual & Quad Multi-Chip Transistors, Fairchild Semiconductor Bipolar ...
Description:
Dual & Quad Multi-Chip Transistors, Fairchild Semiconductor Bipolar Junction Transistors (BJT) broad range provides complete solutions for various circuit application needs. Innovative packages are designed for minimal size, highest reliability and maximum thermal performance.
Small Signal NPN Transistors, ON Semiconductor Standards Manufacturer ...
Description:
Small Signal NPN Transistors, ON Semiconductor Standards Manufacturer Part Nos with S or NSV prefix are automotive qualified to AEC-Q101 standard The ON Semiconductor MMBT3904LT1G is an NPN bipolar transistor designed for linear and switching applications. The MMBT3904LT1G comes in ...