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. 445-2023
FabrikantnummerBC847CE6327HTSA1
FabrikantInfineon
€ 0,157
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Aantal stuks
NPN 100 mA 45 V SOT-23 Surface Mount 330 mW 420 Single 50 V 6 V 250 MHz 3 1 -
RS-stocknr. 445-2051
FabrikantnummerBC857BE6327HTSA1
FabrikantInfineon
€ 0,049
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Aantal stuks
PNP 100 mA 45 V SOT-23 Surface Mount 330 mW 220 Single 50 V 5 V 250 MHz 3 1 -
RS-stocknr. 911-4701
FabrikantnummerBC857BE6327HTSA1
FabrikantInfineon
€ 0,016
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Aantal stuks
PNP 100 mA 45 V SOT-23 Surface Mount 250 mW 220 Single -50 V -5 V - 3 1 -
RS-stocknr. 165-7509
FabrikantnummerBCP5616H6327XTSA1
FabrikantInfineon
€ 0,107
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Aantal stuks
NPN 1 A 80 V SOT-223 Surface Mount 2 W 25 Single 100 V 5 V 100 MHz 3 + Tab 1 -
RS-stocknr. 752-7971
FabrikantnummerBCP5616H6327XTSA1
FabrikantInfineon
€ 0,108
Each (In a Pack of 25)
Aantal stuks
NPN 1 A 80 V SOT-223 Surface Mount 2 W 25 Single 100 V 5 V 100 MHz 3 + Tab 1 -
RS-stocknr. 165-5622
FabrikantnummerBFP182WH6327XTSA1
FabrikantInfineon
€ 0,084
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NPN 35 mA 12 V SOT-343 Surface Mount 250 mW 70 Single 20 V 2 V 8 GHz 4 1 -
RS-stocknr. 826-9367
FabrikantnummerBFP182WH6327XTSA1
FabrikantInfineon
€ 0,108
Each (In a Pack of 100)
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NPN 35 mA 12 V SOT-343 Surface Mount 250 mW 70 Single 20 V 2 V 8 GHz 4 1 -
RS-stocknr. 145-9719
FabrikantnummerBC846PNH6327XTSA1
FabrikantInfineon
€ 0,049
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Aantal stuks
NPN + PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 250 mW 200 Isolated 80 V 6 V 250 MHz 6 2 -
RS-stocknr. 892-2223
FabrikantnummerBC846PNH6327XTSA1
FabrikantInfineon
€ 0,088
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NPN + PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 250 mW 200 Isolated 80 V 6 V 250 MHz 6 2 -
RS-stocknr. 897-7188
FabrikantnummerBFP420FH6327XTSA1
FabrikantInfineon
€ 0,268
Each (In a Pack of 30)
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NPN 60 mA 15 V TSFP Surface Mount 210 mW 60 Single 15 V 1.5 V - 4 1 -
RS-stocknr. 166-1011
FabrikantnummerBC847CE6433HTMA1
FabrikantInfineon
€ 0,02
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Aantal stuks
NPN 100 mA 50 V SOT-23 Surface Mount 330 mW 110 Single 50 V 6 V - 3 1 -
RS-stocknr. 911-4707
FabrikantnummerBC847CE6327HTSA1
FabrikantInfineon
€ 0,02
Each (On a Reel of 3000)
Aantal stuks
NPN 100 mA 45 V SOT-23 Surface Mount 250 mW 420 Single 50 V 6 V - 3 1 -
RS-stocknr. 145-9449
FabrikantnummerBCX53H6327XTSA1
FabrikantInfineon
€ 0,091
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PNP 1 A 80 V SOT-89 Surface Mount 2 W 25 Single 100 V 5 V 125 MHz 3 1 -
RS-stocknr. 445-2146
FabrikantnummerBDP949
FabrikantInfineon
€ 0,614
Each (In a Pack of 5)
Aantal stuks
NPN 3 A 60 V SOT-223 Surface Mount 5 W 25 Single 60 V 5 V 100 MHz 3 + Tab 1 -
RS-stocknr. 752-8101
FabrikantnummerBCX53H6327XTSA1
FabrikantInfineon
€ 0,162
Each (In a Pack of 25)
Aantal stuks
PNP 1 A 80 V SOT-89 Surface Mount 2 W 25 Single 100 V 5 V 125 MHz 3 1 -
RS-stocknr. 857-8753
FabrikantnummerSMBTA06E6433HTMA1
FabrikantInfineon
€ 0,029
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NPN 500 mA 80 V SOT-23 Surface Mount 330 mW 100 Single 80 V 4 V 100 MHz 3 1 -
RS-stocknr. 911-4713
FabrikantnummerBDP949
FabrikantInfineon
€ 0,234
Each (On a Reel of 1000)
Aantal stuks
NPN 3 A 60 V SOT-223 Surface Mount 5 W 50 Single 60 V 5 V 100 MHz 4 1 -
RS-stocknr. 166-1100
FabrikantnummerBFP460H6327XTSA1
FabrikantInfineon
€ 0,15
Each (On a Reel of 3000)
Aantal stuks
NPN 70 mA 15 V SOT-343 Surface Mount 230 mW 90 Single 15 V 1.5 V - 4 1 -
RS-stocknr. 110-7100
FabrikantnummerBFP460H6327XTSA1
FabrikantInfineon
€ 0,178
Each (In a Pack of 50)
Aantal stuks
NPN 70 mA 15 V SOT-343 Surface Mount 230 mW 90 Single 15 V 1.5 V - 4 1 -
RS-stocknr. 165-8072
FabrikantnummerBFP420FH6327XTSA1
FabrikantInfineon
€ 0,168
Each (On a Reel of 3000)
Aantal stuks
NPN 60 mA 15 V TSFP Surface Mount 210 mW 60 Single 15 V 1.5 V - 4 1 -