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. 178-7142
FabrikantnummerBC847,215
FabrikantNexperia
0,022 €
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- - - - - - - - - - - - - -
RS-stocknr. 170-8059
FabrikantnummerBC847,235
FabrikantNexperia
0,011 €
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NPN 100 mA 45 V TO-236 Surface Mount 250 mW 110 Single 50 V 6 V - 3 1 AEC-Q101
RS-stocknr. 436-7953
FabrikantnummerBC847,215
FabrikantNexperia
0,097 €
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NPN 100 mA 45 V SOT-23 (TO-236AB) Surface Mount 250 mW 110 Single 50 V 6 V 100 MHz 3 1 -
RS-stocknr. 761-9828
FabrikantnummerBC547B
FabrikantON Semiconductor
0,235 €
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NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 300 MHz 3 1 -
RS-stocknr. 166-2988
FabrikantnummerBC547B
FabrikantON Semiconductor
0,054 €
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NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS-stocknr. 803-1083
FabrikantnummerBC547BBU
FabrikantON Semiconductor
0,086 €
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NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS-stocknr. 484-5100
FabrikantnummerBC857,215
FabrikantNexperia
0,108 €
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PNP 100 mA 45 V SOT-23 (TO-236AB) Surface Mount 250 mW 125 Single 50 V 5 V 100 MHz 3 1 -
RS-stocknr. 178-7163
FabrikantnummerBC857,215
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0,022 €
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PNP 100 mA 45 V SOT-23 (TO-236AB) Surface Mount 250 mW 125 Single 50 V 5 V 100 MHz 3 1 -
RS-stocknr. 806-4490
FabrikantnummerKSC2334YTU
FabrikantON Semiconductor
0,818 €
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NPN 7 A 100 V TO-220 Through Hole 40 W 20 Single 150 V 7 V - 3 1 -
RS-stocknr. 166-2168
FabrikantnummerKSC2334YTU
FabrikantON Semiconductor
0,744 €
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NPN 7 A 100 V TO-220 Through Hole 40 W 20 Single 150 V 7 V - 3 1 -
RS-stocknr. 739-0381
FabrikantnummerPN2222ATA
FabrikantON Semiconductor
0,22 €
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NPN 1 A 40 V TO-92 Through Hole 625 mW 35 Single 75 V 6 V 300 MHz 3 1 -
RS-stocknr. 545-2210
Fabrikantnummer2N3055G
FabrikantON Semiconductor
5,15 €
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NPN 15 A 60 V TO-204 Through Hole 115 W 5 Single 100 V 7 V 2.5 MHz 3 1 -
RS-stocknr. 103-2964
Fabrikantnummer2N3055G
FabrikantON Semiconductor
3,795 €
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NPN 15 A 60 V TO-204AA Through Hole 115 W 5 Single 100 V 7 V 2.5 MHz 2 1 -
RS-stocknr. 145-5383
FabrikantnummerPN2222ATA
FabrikantON Semiconductor
0,032 €
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NPN 1 A 40 V TO-92 Through Hole 625 mW 35 Single 75 V 6 V 300 MHz 3 1 -
RS-stocknr. 168-6075
FabrikantnummerBD139
0,431 €
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NPN 3 A 80 V SOT-32 Through Hole 1.25 W 25 Single 80 V 5 V - 3 1 -
RS-stocknr. 314-1823
FabrikantnummerBD139
2,22 €
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NPN 3 A 80 V SOT-32 Through Hole 1.25 W 25 Single 80 V 5 V - 3 1 -
RS-stocknr. 761-3505
FabrikantnummerBC557BTA
FabrikantON Semiconductor
0,054 €
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Aantal stuks
PNP 100 mA 45 V TO-92 Through Hole 500 mW 110 Single -50 V -5 V 150 MHz 3 1 -
RS-stocknr. 169-8620
FabrikantnummerBC557BTF
FabrikantON Semiconductor
0,032 €
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Aantal stuks
PNP 100 mA 45 V TO-92 Through Hole 500 mW 110 Single -50 V -5 V 10 MHz 3 1 -
RS-stocknr. 124-1348
FabrikantnummerBC557BTA
FabrikantON Semiconductor
0,032 €
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Aantal stuks
PNP 100 mA 45 V TO-92 Through Hole 500 mW 110 Single -50 V -5 V 150 MHz 3 1 -
RS-stocknr. 803-1138
FabrikantnummerBC557BTF
FabrikantON Semiconductor
0,065 €
Each (In a Pack of 200)
Aantal stuks
PNP 100 mA 45 V TO-92 Through Hole 500 mW 110 Single -50 V -5 V 10 MHz 3 1 -
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