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).

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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. 166-2584
Mfr. Part No.SS8050DBU
MYR0.159
Each (In a Bag of 10000)
units
NPN 1.5 A 25 V TO-92 Through Hole 1 W 40 Single 40 V 6 V - 3 1 -
RS Stock No. 799-4817
Mfr. Part No.2SC5200-O(S1,F,S)
BrandToshiba
MYR8.106
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. 251-3564
Mfr. Part No.TIP35C
MYR7.40
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. 145-5537
Mfr. Part No.SS8050DTA
MYR0.147
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. 739-0335
Mfr. Part No.SS8050DTA
MYR0.757
Each (In a Pack of 10)
units
NPN 1.5 A 25 V TO-92 Through Hole 1 W 40 Single 40 V 6 V - 3 1 -
RS Stock No. 862-4979
Mfr. Part No.MJ21193G
MYR26.67
Each (In a Pack of 2)
units
PNP 16 A 250 V TO-204AA Through Hole 250 W 8 Single -400 V -5 V - 2 1 -
RS Stock No. 739-0439
Mfr. Part No.2N4401BU
MYR0.785
Each (In a Pack of 10)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 20 Single 60 V 6 V - 3 1 -
RS Stock No. 102-4116
Mfr. Part No.2SD882
MYR1.215
Each (In a Tube of 50)
units
NPN 3 A 30 V SOT-32 Through Hole 12.5 W 30 Single 60 V 5 V 100 MHz 3 1 -
RS Stock No. 166-3204
Mfr. Part No.2N4401TF
MYR0.149
Each (On a Reel of 2000)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 20 Single 60 V 6 V 250 MHz 3 1 -
RS Stock No. 805-1069
Mfr. Part No.2N4401TAR
MYR0.308
Each (In a Pack of 200)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 20 Single 60 V 6 V 250 MHz 3 1 -
RS Stock No. 145-5433
Mfr. Part No.KSA1015YTA
MYR0.127
Each (On a Tape of 2000)
units
PNP 150 mA 50 V TO-92 Through Hole 400 mW 70 Single -50 V -5 V 1 MHz 3 1 -
RS Stock No. 805-1078
Mfr. Part No.2N4401TF
MYR0.147
Each (In a Pack of 200)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 20 Single 60 V 6 V 250 MHz 3 1 -
RS Stock No. 166-1318
Mfr. Part No.BCP53-10,115
BrandNexperia
MYR0.352
Each (On a Reel of 1000)
units
PNP 1 A 80 V SOT-223 (SC-73) Surface Mount 1 W 63 Single 100 V 5 V 145 MHz 4 1 -
RS Stock No. 686-8045
Mfr. Part No.2SD882
MYR2.54
Each (In a Pack of 10)
units
NPN 3 A 30 V SOT-32 Through Hole 12.5 W 30 Single 60 V 5 V 100 MHz 3 1 -
RS Stock No. 166-2728
Mfr. Part No.2N4401BU
MYR0.142
Each (In a Bag of 10000)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 20 Single 60 V 6 V 250 MHz 3 1 -
RS Stock No. 806-4403
Mfr. Part No.KSA1015YTA
MYR0.21
Each (In a Pack of 200)
units
PNP 150 mA 50 V TO-92 Through Hole 400 mW 70 Single -50 V -5 V 1 MHz 3 1 -
RS Stock No. 145-5498
Mfr. Part No.2N4401TAR
MYR0.176
Each (On a Tape of 2000)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 20 Single 60 V 6 V 250 MHz 3 1 -
RS Stock No. 739-0394
Mfr. Part No.2N4401TA
MYR0.986
Each (In a Pack of 10)
units
NPN 600 mA 40 V TO-92 Through Hole 625 mW 20 Single 60 V 6 V - 3 1 -
RS Stock No. 508-412
Mfr. Part No.BCP53-10,115
BrandNexperia
MYR0.795
Each (In a Pack of 50)
units
PNP 1 A 80 V SOT-223 (SC-73) Surface Mount 1 W 63 Single 100 V 5 V 145 MHz 4 1 -
RS Stock No. 146-2333
Mfr. Part No.BC548B A1
MYR0.095
Each (On a Tape of 4000)
units
NPN 100 mA 30 V TO-92 Through Hole 500 mW 200 Single 30 V 6 V - 3 1 -
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