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. 168-6254
FabrikantnummerMJE350
€ 0,466
Each (In a Tube of 50)
Aantal stuks
PNP 500 mA 300 V SOT-32 Through Hole 20.8 W 30 Single 300 V 3 V - 3 1 -
RS-stocknr. 166-1974
FabrikantnummerBC547CTFR
FabrikantON Semiconductor
€ 0,032
Each (On a Reel of 2000)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS-stocknr. 803-1099
FabrikantnummerBC547CTFR
FabrikantON Semiconductor
€ 0,065
Each (In a Pack of 200)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS-stocknr. 805-1065
Fabrikantnummer2N3906TFR
FabrikantON Semiconductor
€ 0,065
Each (In a Pack of 200)
Aantal stuks
PNP 200 mA 40 V TO-92 Through Hole 625 mW 60 Single -40 V -5 V 250 MHz 3 1 -
RS-stocknr. 807-0842
FabrikantnummerFJA4310OTU
FabrikantON Semiconductor
€ 2,094
Each (In a Pack of 5)
Aantal stuks
NPN 10 A 140 V TO-3P Through Hole 100 W 50 Single 200 V 6 V 30 MHz 3 1 -
RS-stocknr. 145-5439
FabrikantnummerFJA4310OTU
FabrikantON Semiconductor
€ 1,779
Each (In a Tube of 30)
Aantal stuks
NPN 10 A 140 V TO-3P Through Hole 100 W 50 Single 200 V 6 V 30 MHz 3 1 -
RS-stocknr. 163-0961
FabrikantnummerMJE243G
FabrikantON Semiconductor
€ 0,248
Each (In a Box of 500)
Aantal stuks
NPN 4 A 100 V TO-225 Through Hole 15 W 15 Single 100 V 7 V 10 MHz 3 1 -
RS-stocknr. 169-8696
Fabrikantnummer2N3906TAR
FabrikantON Semiconductor
€ 0,036
Each (On a Reel of 2000)
Aantal stuks
PNP 200 mA 40 V TO-92 Through Hole 625 mW 60 Single -40 V -5 V 250 MHz 3 1 -
RS-stocknr. 774-3574
FabrikantnummerMJE243G
FabrikantON Semiconductor
€ 0,407
Each (In a Pack of 10)
Aantal stuks
NPN 4 A 100 V TO-225 Through Hole 15 W 15 Single 100 V 7 V 10 MHz 3 1 -
RS-stocknr. 545-2210
Fabrikantnummer2N3055G
FabrikantON Semiconductor
€ 5,36
Each
Aantal stuks
NPN 15 A 60 V TO-204 Through Hole 115 W 5 Single 100 V 7 V 2.5 MHz 3 1 -
RS-stocknr. 761-9822
FabrikantnummerBC547CTA
FabrikantON Semiconductor
€ 0,056
Each (In a Pack of 100)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 300 MHz 3 1 -
RS-stocknr. 103-2964
Fabrikantnummer2N3055G
FabrikantON Semiconductor
€ 3,631
Each (In a Tray of 100)
Aantal stuks
NPN 15 A 60 V TO-204AA Through Hole 115 W 5 Single 100 V 7 V 2.5 MHz 2 1 -
RS-stocknr. 486-4577
FabrikantnummerMJE350
€ 0,59
Each (In a Pack of 5)
Aantal stuks
PNP 500 mA 300 V SOT-32 Through Hole 20.8 W 30 Single 300 V 3 V - 3 1 -
RS-stocknr. 146-2087
FabrikantnummerBC547CTA
FabrikantON Semiconductor
€ 0,03
Each (On a Tape of 2000)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 300 MHz 3 1 -
RS-stocknr. 163-2108
FabrikantnummerCPH5518-TL-H
FabrikantON Semiconductor
€ 0,14
Each (On a Reel of 3000)
Aantal stuks
NPN + PNP 1 A 50 V CPH Surface Mount 1.2 W 200 Common Emitter -50 V, 80 V -5 V, 5 V 420 MHz 5 2 -
RS-stocknr. 170-4161
FabrikantnummerBC548A A1
€ 0,031
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. 166-2057
FabrikantnummerFSB560
FabrikantON Semiconductor
€ 0,067
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. 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. 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. 806-4475
FabrikantnummerKSC1845FTA
FabrikantON Semiconductor
€ 0,072
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 -
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