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 792-0872
Tillv. art.nrBLT81,115
VarumärkeNXP
10,805 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 165-9834
Tillv. art.nrBLT81,115
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9,823 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 816-7808
Tillv. art.nrBFG520/X
VarumärkeNXP
1,505 kr
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NPN 70 mA 15 V SOT-143B Surface Mount 300 mW 60 Single 20 V 2.5 V 900 MHz 4 1 -
RS-artikelnummer 165-8722
Tillv. art.nrBFG520/X
VarumärkeNXP
1,368 kr
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NPN 70 mA 15 V SOT-143B Surface Mount 300 mW 60 Single 20 V 2.5 V 900 MHz 4 1 -
RS-artikelnummer 166-1525
Tillv. art.nrBFG35,115
VarumärkeNXP
3,624 kr
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NPN 150 mA 18 V SOT-223 (SC-73) Surface Mount 1 W 25 Single 25 V 2 V 4000 MHz 4 1 -
RS-artikelnummer 233-253
Tillv. art.nrBFG35,115
VarumärkeNXP
4 010,63 kr
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NPN 150 mA 18 V SC-73 Surface Mount 1 W 25 Single 25 V 2 V 4000 MHz 4 1 -
RS-artikelnummer 380-3133
Tillv. art.nrBFG35,115
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3,694 kr
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NPN 150 mA 18 V SOT-223 (SC-73) Surface Mount 1 W 25 Single 25 V 2 V 4000 MHz 4 1 -
RS-artikelnummer 626-2759
Tillv. art.nrBFQ67W,115
VarumärkeNXP
1,375 kr
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NPN 50 mA 10 V UMT Surface Mount 300 mW 60 Single 20 V 2.5 V 8000 MHz 3 1 -
RS-artikelnummer 166-0433
Tillv. art.nrBFQ18A,115
VarumärkeNXP
3,964 kr
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NPN 150 mA 18 V UPAK Surface Mount 1 W 25 Single 25 V 2 V 4000 MHz 4 1 -
RS-artikelnummer 626-2535
Tillv. art.nrBFG325W/XR,115
VarumärkeNXP
0,84 kr
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NPN 35 mA 6 V CMPAK Surface Mount 210 mW 60 Single 15 V 2 V 14000 MHz 4 1 -
RS-artikelnummer 166-0549
Tillv. art.nrPRF957,115
VarumärkeNXP
1,103 kr
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NPN 100 mA 10 V UMT Surface Mount 270 mW 50 Single 20 V 1.5 V 8500 MHz 3 1 -
RS-artikelnummer 166-0543
Tillv. art.nrBFS25A,115
VarumärkeNXP
0,794 kr
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NPN 7 mA 5 V UMT Surface Mount 32 mW 50 Single 8 V 2 V 5000 MHz 3 1 -
RS-artikelnummer 179-1181
Tillv. art.nrPRF947,115
VarumärkeNXP
0,95 kr
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NPN 50 mA 10 V UMT Surface Mount 250 mW 50 Single 20 V 1.5 V 8500 MHz 3 1 -
RS-artikelnummer 166-0540
Tillv. art.nrBFG325W/XR,115
VarumärkeNXP
0,794 kr
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NPN 35 mA 6 V CMPAK Surface Mount 210 mW 60 Single 15 V 2 V 14000 MHz 4 1 -
RS-artikelnummer 626-2715
Tillv. art.nrBFQ18A,115
VarumärkeNXP
4,364 kr
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NPN 150 mA 18 V UPAK Surface Mount 1 W 25 Single 25 V 2 V 4000 MHz 4 1 -
RS-artikelnummer 626-2838
Tillv. art.nrBFT25A,215
VarumärkeNXP
1,303 kr
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NPN 7 mA 5 V SOT-23 (TO-236AB) Surface Mount 32 mW 50 Single 8 V 2 V 5000 MHz 3 1 -
RS-artikelnummer 626-3342
Tillv. art.nrPRF957,115
VarumärkeNXP
1,21 kr
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NPN 100 mA 10 V UMT Surface Mount 270 mW 50 Single 20 V 1.5 V 8500 MHz 3 1 -
RS-artikelnummer 165-8721
Tillv. art.nrBFU725F/N1
VarumärkeNXP
0,853 kr
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NPN 40 mA 2.8 V SOT-343F Surface Mount 136 mW 160 Single 10 V 1 V 12 GHz 4 1 -
RS-artikelnummer 626-3336
Tillv. art.nrPRF947,115
VarumärkeNXP
0,924 kr
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NPN 50 mA 10 V UMT Surface Mount 250 mW 50 Single 20 V 1.5 V 8500 MHz 3 1 -
RS-artikelnummer 816-7801
Tillv. art.nrBFU725F/N1
VarumärkeNXP
0,873 kr
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NPN 40 mA 2.8 V SOT-343F Surface Mount 136 mW 160 Single 10 V 1 V 12 GHz 4 1 -