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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Omschrijving Prijs 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-stocknr. 922-8386
FabrikantnummerDSS4540X-13
FabrikantDiodesZetex
€ 0,127
Each (On a Reel of 2500)
Aantal stuks
NPN 4 A 40 V SOT-89 Surface Mount 2 W 100 Single 40 V 6 V 70 MHz 3 1 -
RS-stocknr. 806-4475
FabrikantnummerKSC1845FTA
FabrikantON Semiconductor
€ 0,075
Each (In a Pack of 200)
Aantal stuks
NPN 50 mA 120 V TO-92 Through Hole 500 mW 150 Single 120 V 5 V 110 MHz 3 1 -
RS-stocknr. 146-2074
FabrikantnummerPN2222ABU
FabrikantON Semiconductor
€ 0,032
Each (In a Bag of 10000)
Aantal stuks
NPN 1 A 40 V TO-92 Through Hole 625 mW 35 Single 75 V 6 V 300 MHz 3 1 -
RS-stocknr. 890-2642
Fabrikantnummer2SC3326-A(TE85L,F)
FabrikantToshiba
€ 0,237
Each (In a Pack of 25)
Aantal stuks
NPN 300 mA 20 V SOT-346 (SC-59) Surface Mount 150 mW 200 Single 50 V 25 V - 3 1 -
RS-stocknr. 739-0555
FabrikantnummerPN2222ABU
FabrikantON Semiconductor
€ 0,028
Each (In a Pack of 10)
Aantal stuks
NPN 1 A 40 V TO-92 Through Hole 625 mW 35 Single 75 V 6 V 300 MHz 3 1 -
RS-stocknr. 807-6027
FabrikantnummerFSB560
FabrikantON Semiconductor
€ 0,237
Each (In a Pack of 50)
Aantal stuks
NPN 2 A 60 V SOT-23 Surface Mount 500 mW 100 Single 80 V 5 V 75 MHz 3 1 -
RS-stocknr. 166-2057
FabrikantnummerFSB560
FabrikantON Semiconductor
€ 0,086
Each (On a Reel of 3000)
Aantal stuks
NPN 2 A 60 V SOT-23 Surface Mount 500 mW 100 Single 80 V 5 V 75 MHz 3 1 -
RS-stocknr. 166-3785
FabrikantnummerKSC1845FTA
FabrikantON Semiconductor
€ 0,043
Each (On a Tape of 2000)
Aantal stuks
NPN 50 mA 120 V TO-92 Through Hole 500 mW 150 Single 120 V 5 V 110 MHz 3 1 -
RS-stocknr. 751-4294
FabrikantnummerDSS4540X-13
FabrikantDiodesZetex
€ 0,324
Each (On a Tape of 25)
Aantal stuks
NPN 4 A 40 V SOT-89 Surface Mount 2 W 100 Single 40 V 6 V 70 MHz 3 1 -
RS-stocknr. 544-9630
FabrikantnummerMJ15023G
FabrikantON Semiconductor
€ 5,85
Each
Aantal stuks
PNP 16 A 200 V TO-204 Through Hole 250 W 5 Single 350 V 5 V 4 MHz 3 1 -
RS-stocknr. 170-4161
FabrikantnummerBC548A A1
€ 0,032
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW 110 Single 30 V 6 V - 3 1 -
RS-stocknr. 122-0086
FabrikantnummerMJ15023G
FabrikantON Semiconductor
€ 4,377
Each (In a Tray of 100)
Aantal stuks
PNP 16 A 200 V TO-204 Through Hole 250 W 5 Single 350 V 5 V 4 MHz 3 1 -
RS-stocknr. 170-4158
FabrikantnummerBC547C A1
€ 0,032
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 420 Single 50 V 6 V - 3 1 -
RS-stocknr. 168-6165
FabrikantnummerTIP2955
€ 1,294
Each (In a Tube of 30)
Aantal stuks
PNP 15 A 60 V TO-247 Through Hole 90 W 5 Single 100 V - 3 MHz 3 1 -
RS-stocknr. 463-634
FabrikantnummerMJE15032G
FabrikantON Semiconductor
€ 1,326
Each (In a Pack of 5)
Aantal stuks
NPN 8 A 250 V TO-220AB Through Hole 2 W 10 Single 250 V 5 V 30 MHz 3 1 -
RS-stocknr. 178-1437
FabrikantnummerTIP31C
€ 0,42
Each (In a Tube of 50)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 796-9701
FabrikantnummerBC547C A1
€ 0,13
Each (In a Pack of 250)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 420 Single 50 V 6 V - 3 1 -
RS-stocknr. 545-2816
FabrikantnummerBCP56T1G
FabrikantON Semiconductor
€ 0,075
Each (On a Reel of 1000)
Aantal stuks
NPN 1 A 80 V SOT-223 Surface Mount 1.5 W 25 Single 100 V 5 V 130 MHz 3 + Tab 1 -
RS-stocknr. 168-6073
FabrikantnummerMJE3055T
€ 0,598
Each (In a Tube of 50)
Aantal stuks
NPN 10 A 60 V TO-220 Through Hole 75 W 5 Single 70 V 5 V 2 MHz 3 1 -
RS-stocknr. 739-0331
FabrikantnummerKSP2907ATA
FabrikantON Semiconductor
€ 0,22
Each (In a Pack of 10)
Aantal stuks
PNP 600 mA 60 V TO-92 Through Hole 625 mW 50 Single -60 V -5 V - 3 1 -
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