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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Beskrivning Pris 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-artikelnummer 911-4713
Tillv. art.nrBDP949
VarumärkeInfineon
2,652 kr
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NPN 3 A 60 V SOT-223 Surface Mount 5 W 50 Single 60 V 5 V 100 MHz 4 1 -
RS-artikelnummer 751-4127
Tillv. art.nrDMMT3904W-7-F
VarumärkeDiodesZetex
2,68 kr
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NPN 200 mA 40 V SOT-363 (SC-88) Surface Mount 200 mW 30 Isolated 60 V 6 V 300 MHz 6 2 -
RS-artikelnummer 166-3709
Tillv. art.nrBCP54
VarumärkeON Semiconductor
0,916 kr
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NPN 1.5 A 45 V SOT-223 Surface Mount 1.5 W 150 Single 45 V 5 V - 3 + Tab 1 -
RS-artikelnummer 166-2585
Tillv. art.nrSS8050CBU
VarumärkeON Semiconductor
0,334 kr
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NPN 1.5 A 25 V TO-92 Through Hole 1 W 40 Single 40 V 6 V - 3 1 -
RS-artikelnummer 739-0313
Tillv. art.nrSS8050CBU
VarumärkeON Semiconductor
1,789 kr
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NPN 1.5 A 25 V TO-92 Through Hole 1 W 40 Single 40 V 6 V - 3 1 -
RS-artikelnummer 671-1116
Tillv. art.nrBC33725TA
VarumärkeON Semiconductor
1,965 kr
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NPN 800 mA 45 V TO-92 Through Hole 625 mW 100 Single - 5 V 100 MHz 3 1 -
RS-artikelnummer 760-3117
Tillv. art.nr2SA1943-O(Q)
VarumärkeToshiba
29,16 kr
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PNP 15 A 230 V TO-3PL Through Hole 150 W 35 Single -230 V -5 V 30 MHz 3 1 -
RS-artikelnummer 807-5099
Tillv. art.nrBCP54
VarumärkeON Semiconductor
0,936 kr
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NPN 1.5 A 45 V SOT-223 Surface Mount 1.5 W 150 Single 45 V 5 V - 3 + Tab 1 -
RS-artikelnummer 824-5484
Tillv. art.nrZXT849KTC
VarumärkeDiodesZetex
11,808 kr
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NPN 7 A 80 V DPAK (TO-252) Surface Mount 4.2 W 100 Single 80 V 7 V 100 MHz 3 1 -
RS-artikelnummer 169-8605
Tillv. art.nrBC33725TFR
VarumärkeON Semiconductor
0,491 kr
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NPN 800 mA 50 V TO-92 Through Hole 625 mW 100 Single 10 V 5 V 50 MHz 3 1 -
RS-artikelnummer 168-7405
Tillv. art.nr2SA1943-O(Q)
VarumärkeToshiba
21,381 kr
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PNP 15 A 230 V TO-3PL Through Hole 150 W 35 Single -230 V -5 V 30 MHz 3 1 -
RS-artikelnummer 803-1061
Tillv. art.nrBC33725TFR
VarumärkeON Semiconductor
0,925 kr
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NPN 800 mA 50 V TO-92 Through Hole 625 mW 100 Single 10 V 5 V 50 MHz 3 1 -
RS-artikelnummer 169-7470
Tillv. art.nrZXT849KTC
VarumärkeDiodesZetex
5,462 kr
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NPN 7 A 80 V DPAK (TO-252) Surface Mount 4.2 W 100 Single 80 V 7 V 100 MHz 3 1 -
RS-artikelnummer 803-1068
Tillv. art.nrBC33725TAR
VarumärkeON Semiconductor
0,647 kr
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NPN 800 mA 50 V TO-92 Through Hole 625 mW 100 Single 10 V 5 V 50 MHz 3 1 -
RS-artikelnummer 178-7544
Tillv. art.nrBC33725TAR
VarumärkeON Semiconductor
0,346 kr
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- - - - - - - - - - - - - -
RS-artikelnummer 124-1731
Tillv. art.nrBC33725TA
VarumärkeON Semiconductor
0,446 kr
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NPN 800 mA 45 V TO-92 Through Hole 625 mW 100 Single - 5 V 100 MHz 3 1 -
RS-artikelnummer 792-0872
Tillv. art.nrBLT81,115
VarumärkeNXP
9,98 kr
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NPN 500 mA 9.5 V SOT-223 Surface Mount 2 W 25 Single 20 V 2.5 V 900 MHz 3 + Tab 1 -
RS-artikelnummer 739-0442
Tillv. art.nr2N3904TA
VarumärkeON Semiconductor
2,968 kr
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NPN 200 mA 40 V TO-92 Through Hole 625 mW 30 Single 60 V 6 V 300 MHz 3 1 -
RS-artikelnummer 168-6815
Tillv. art.nrMJE340
VarumärkeSTMicroelectronics
4,459 kr
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NPN 500 mA 300 V SOT-32 Through Hole 2.8 W 30 Single 300 V 3 V - 3 1 -
RS-artikelnummer 796-9739
Tillv. art.nrBC550C A1
1,344 kr
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NPN 100 mA 45 V TO-92 Through Hole 500 mW 420 Single 50 V 6 V - 3 1 -
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