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 81 - 100 of 4637 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. 177-5499
Mfr. Part No.2N2907ACSM
BrandSemelab
SGD26.791
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. 781-5222
Mfr. Part No.SMMBT2222ALT1G
SGD0.087
Each (In a Pack of 100)
units
NPN 600 mA 40 V SOT-23 Surface Mount 225 mW 40 Single 75 V dc 6 V 100 MHz 3 1 AEC-Q101
RS Stock No. 803-1083
Mfr. Part No.BC547BBU
SGD0.089
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. 166-2988
Mfr. Part No.BC547B
SGD0.086
Each (In a Bag of 10000)
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. 725-8607
Mfr. Part No.MMBT2222A,215
BrandNexperia
SGD0.128
Each (In a Pack of 50)
units
NPN 600 mA 40 V SOT-23 (TO-236AB) Surface Mount 250 mW 35 Single 75 V 6 V - 3 1 -
RS Stock No. 177-5495
Mfr. Part No.2N2222ACSM
BrandSemelab
SGD26.997
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. 545-0343
Mfr. Part No.MMBT3904LT1G
SGD0.167
Each (In a Pack of 50)
units
NPN 200 mA 40 V SOT-23 Surface Mount 300 mW 40 Single 60 V 6 V 300 MHz 3 1 -
RS Stock No. 103-2948
Mfr. Part No.MMBT3904LT1G
SGD0.026
Each (On a Reel of 3000)
units
NPN 200 mA 40 V SOT-23 Surface Mount 300 mW 40 Single 60 V 6 V 300 MHz 3 1 -
RS Stock No. 170-3540
Mfr. Part No.MMBT3904LT3G
SGD0.019
Each (On a Reel of 10000)
units
NPN 900 mA 40 V SOT-23 Surface Mount 300 mW 30 Single 60 V dc 6 V 100 MHz 3 1 -
RS Stock No. 295-517
Mfr. Part No.ZTX653
SGD1.432
Each (In a Pack of 5)
units
NPN 2 A 100 V E-Line Through Hole 1 W - Single 120 V 5 V 175 MHz 3 1 -
RS Stock No. 896-2625
Mfr. Part No.2SC2712-Y,LF(T
BrandToshiba
SGD0.068
Each (In a Pack of 50)
units
NPN 150 mA 50 V TO-236MOD Surface Mount 150 mW 70 Single 60 V 5 V 80 MHz 3 1 -
RS Stock No. 145-4325
Mfr. Part No.TIP42CTU
SGD0.616
Each (In a Tube of 50)
units
PNP 6 A 100 V TO-220 Through Hole 65 mW 15 Single -100 V -5 V - 3 1 -
RS Stock No. 739-0385
Mfr. Part No.KSP2222ABU
SGD0.305
Each (In a Pack of 10)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 40 Single 75 V 6 V - 3 1 -
RS Stock No. 922-7743
Mfr. Part No.ZTX653
SGD0.627
Each (In a Bag of 4000)
units
NPN 2 A 100 V E-Line Through Hole 1 W - Single 120 V 5 V 175 MHz 3 1 -
RS Stock No. 756-0293
Mfr. Part No.2SC5886A(T6L1,NQ)
BrandToshiba
SGD0.776
Each (In a Pack of 5)
units
NPN 5 A 50 V DPAK (TO-252) Surface Mount 20 W 200 Single 120 V 9 V - 3 1 -
RS Stock No. 485-9727
Mfr. Part No.TIP3055
SGD1.258
Each (In a Pack of 5)
units
NPN 15 A 60 V TO-247 Through Hole 90 W 5 Single 100 V - 3 MHz 3 1 -
RS Stock No. 761-9831
Mfr. Part No.BC556BTA
SGD0.077
Each (In a Pack of 100)
units
PNP 100 mA 65 V TO-92 Through Hole 500 mW 110 Single -80 V -5 V 150 MHz 3 1 -
RS Stock No. 166-1786
Mfr. Part No.SS8550DBU
SGD0.051
Each (In a Bag of 10000)
units
PNP 1.5 A 25 V TO-92 Through Hole 1 W 40 Single -40 V -6 V 200 MHz 3 1 -
RS Stock No. 178-7142
Mfr. Part No.BC847,215
BrandNexperia
SGD0.021
Each (On a Reel of 3000)
units
- - - - - - - - - - - - - -
RS Stock No. 799-4753
Mfr. Part No.2SA1943N(S1,E,S)
BrandToshiba
SGD3.616
Each (In a Pack of 5)
units
PNP 15 A 230 V TO-3PN Through Hole 150 W 35 Single -230 V -5 V 30 MHz 3 1 -
Related Products
The ON Semiconductor BC817-40LT1G is an NPN bipolar ...
Description:
The ON Semiconductor BC817-40LT1G is an NPN bipolar transistor for linear and switching general purpose applications. The BC817-40LT1G comes in a 3-pin SOT-23 SMD package. This particular package type is ideal for low-power applications. Applications:• ESD Protection• Polarity Reversal Protection• ...
A great choice of devices, and packages down ...
Description:
A great choice of devices, and packages down to ultra-small sizes. Part of a 300+ strong, small-signal bipolar device portfolio, our single NPN transistors are perfect for your switching and amplification applications. We also offer a variety of SMD packages ...
A great choice of devices, and packages down ...
Description:
A great choice of devices, and packages down to ultra-small sizes. Part of a 300+ strong, small-signal bipolar device portfolio, our single NPN transistors are perfect for your switching and amplification applications. We also offer a variety of SMD packages ...
Robust and efficient solutions suitable for many applications. ...
Description:
Robust and efficient solutions suitable for many applications. Our medium power transistors make highly reliable solutions for a broad spectrum applications. You also have a choice of three packages, the SOT89, SOT223 and SOT1061. High currentThree current gain selectionsHigh power ...