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. 313-6916
FabrikantnummerMJE3055T
€ 0,72
Each
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. 178-1437
FabrikantnummerTIP31C
€ 0,433
Each (In a Tube of 50)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 485-9856
FabrikantnummerTIP50
€ 0,70
Each (In a Pack of 5)
Aantal stuks
NPN 1 A 400 V TO-220 Through Hole 2 W 10 Single 500 V 5 V 10 MHz 3 1 -
RS-stocknr. 170-4158
FabrikantnummerBC547C A1
€ 0,031
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. 544-9618
FabrikantnummerMJE15031G
FabrikantON Semiconductor
€ 1,32
Each
Aantal stuks
PNP 8 A 150 V TO-220AB Through Hole 50 W 20 Single 150 V 5 V 30 MHz 3 1 -
RS-stocknr. 463-634
FabrikantnummerMJE15032G
FabrikantON Semiconductor
€ 1,346
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. 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. 103-2936
FabrikantnummerMJE15031G
FabrikantON Semiconductor
€ 1,147
Each (In a Tube of 50)
Aantal stuks
PNP 8 A 150 V TO-220AB Through Hole 50 W 20 Single 150 V 5 V 30 MHz 3 1 -
RS-stocknr. 485-9705
FabrikantnummerTIP2955
€ 1,476
Each (In a Pack of 5)
Aantal stuks
PNP 15 A 60 V TO-247 Through Hole 90 W 5 Single 100 V - 3 MHz 3 1 -
RS-stocknr. 170-4169
FabrikantnummerBC550C A1
€ 0,031
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. 796-9739
FabrikantnummerBC550C 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. 485-9812
FabrikantnummerTIP41C
€ 0,552
Each (In a Pack of 5)
Aantal stuks
NPN 6 A 100 V TO-220 Through Hole 65 W 15 Single 100 V 5 V - 3 1 -
RS-stocknr. 168-6171
FabrikantnummerTIP41C
€ 0,486
Each (In a Tube of 50)
Aantal stuks
NPN 6 A 100 V TO-220 Through Hole 65 W 15 Single 100 V 5 V - 3 1 -
RS-stocknr. 859-997
FabrikantnummerBUL216
€ 2,22
Each
Aantal stuks
NPN 4 A 800 V TO-220 Through Hole 9 W 10 Single 1600 V 9 V - 3 1 -
RS-stocknr. 168-5846
FabrikantnummerBUL216
€ 1,334
Each (In a Tube of 50)
Aantal stuks
NPN 4 A 800 V TO-220 Through Hole 9 W 10 Single 1600 V 9 V - 3 1 -
RS-stocknr. 170-4150
FabrikantnummerBC337-40 A1
€ 0,036
Each (On a Tape of 4000)
Aantal stuks
NPN 800 mA 45 V TO-92 Through Hole 625 mW 250 Single 50 V 5 V - 3 1 -
RS-stocknr. 796-9672
FabrikantnummerBC337-40 A1
€ 0,15
Each (In a Pack of 250)
Aantal stuks
NPN 800 mA 45 V TO-92 Through Hole 625 mW 250 Single 50 V 5 V - 3 1 -
RS-stocknr. 544-9680
FabrikantnummerMJE15030G
FabrikantON Semiconductor
€ 1,32
Each
Aantal stuks
NPN 8 A 150 V TO-220AB Through Hole 50 W 20 Single 150 V 5 V 30 MHz 3 1 -
RS-stocknr. 122-0087
FabrikantnummerMJ15024G
FabrikantON Semiconductor
€ 4,635
Each (In a Tray of 100)
Aantal stuks
NPN 16 A 250 V TO-204 Through Hole 250 W 5 Single 400 V 5 V 4 MHz 3 1 -
RS-stocknr. 145-5539
FabrikantnummerMMBT4403
FabrikantON Semiconductor
€ 0,043
Each (On a Reel of 3000)
Aantal stuks
PNP 600 mA 40 V SOT-23 Surface Mount 350 mW 20 Single 40 V 5 V - 3 1 -
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