Bipolar Transistors

Bipolar Transistors are a solid state, three-pin devices made from three layers of silicon. A bipolar transistor 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

Bipolar transistors are constructed 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.

How do bipolar transistors work?

Bipolar transistors have 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.

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.

They are also available as;

  • Digital transistors - are made of a semiconductor material, usually silicon, which conducts the current (or electricity) with little resistance. They also tend to have at least three terminals for easy connection to an external circuit.
  • UJT transistors - constructed of a bar of lightly dope N type silicone with a small piece of heavily doped P type material attached to one side. Since the silicon bar is lightly dope it has very high resistance.

Applications of bipolar transistors?

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 Transistor Configuration Maximum Collector Base Voltage Maximum Emitter Base Voltage Maximum Operating Frequency Pin Count Number of Elements per Chip Dimensions Minimum Operating Temperature
RS-stocknr. 485-9755
FabrikantnummerTIP31C
€ 0,49
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Aantal stuks
NPN 3 A 100 V TO-220 Through Hole 2 W Single 100 V 5 V - 3 1 9.15 x 10.4 x 4.6mm -
RS-stocknr. 796-9701
FabrikantnummerBC547C A1
€ 0,114
Each (In a Pack of 250)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW Single 50 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 102-1375
FabrikantnummerMJE15032G
FabrikantON Semiconductor
€ 1,029
Each (In a Tube of 50)
Aantal stuks
NPN 8 A 250 V TO-220AB Through Hole 2 W Single 250 V 5 V 30 MHz 3 1 9.28 x 10.28 x 4.82mm -
RS-stocknr. 168-6165
FabrikantnummerTIP2955
€ 1,415
Each (In a Tube of 30)
Aantal stuks
PNP 15 A 60 V TO-247 Through Hole 90 W Single 100 V - 3 MHz 3 1 20.15 x 15.75 x 5.15mm -
RS-stocknr. 170-3462
FabrikantnummerBCP56T3G
FabrikantON Semiconductor
€ 0,058
Each (On a Reel of 4000)
Aantal stuks
NPN 1 A 80 V SOT-223 Surface Mount 1.5 W Single 100 V 5 V 35 MHz 3 + Tab 1 6.5 x 3.5 x 1.63mm -
RS-stocknr. 145-5536
FabrikantnummerKSP2907ATA
FabrikantON Semiconductor
€ 0,036
Each (On a Tape of 2000)
Aantal stuks
PNP 600 mA 60 V TO-92 Through Hole 625 mW Single -60 V -5 V - 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 485-9705
FabrikantnummerTIP2955
€ 1,666
Each (In a Pack of 5)
Aantal stuks
PNP 15 A 60 V TO-247 Through Hole 90 W Single 100 V - 3 MHz 3 1 20.15 x 15.75 x 5.15mm -
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 Single 100 V 5 V - 3 1 9.15 x 10.4 x 4.6mm -
RS-stocknr. 168-5846
FabrikantnummerBUL216
€ 1,279
Each (In a Tube of 50)
Aantal stuks
NPN 4 A 800 V TO-220 Through Hole 9 W Single 1600 V 9 V - 3 1 9.15 x 10.4 x 4.6mm -
RS-stocknr. 796-9739
FabrikantnummerBC550C A1
€ 0,112
Each (In a Pack of 250)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW Single 50 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 168-6171
FabrikantnummerTIP41C
€ 0,455
Each (In a Tube of 50)
Aantal stuks
NPN 6 A 100 V TO-220 Through Hole 65 W Single 100 V 5 V - 3 1 9.15 x 10.4 x 4.6mm -
RS-stocknr. 859-997
FabrikantnummerBUL216
€ 1,52
Each
Aantal stuks
NPN 4 A 800 V TO-220 Through Hole 9 W Single 1600 V 9 V - 3 1 9.15 x 10.4 x 4.6mm -
RS-stocknr. 796-9672
FabrikantnummerBC337-40 A1
€ 0,131
Each (In a Pack of 250)
Aantal stuks
NPN 800 mA 45 V TO-92 Through Hole 625 mW Single 50 V 5 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 170-4150
FabrikantnummerBC337-40 A1
€ 0,034
Each (On a Tape of 4000)
Aantal stuks
NPN 800 mA 45 V TO-92 Through Hole 625 mW Single 50 V 5 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 170-4169
FabrikantnummerBC550C A1
€ 0,029
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW Single 50 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 166-2768
FabrikantnummerFJP13009H2TU
FabrikantON Semiconductor
€ 0,745
Each (In a Tube of 50)
Aantal stuks
NPN 12 A 400 V TO-220 Through Hole 100 W Single 700 V 9 V - 3 1 9.9 x 4.5 x 9.2mm -
RS-stocknr. 485-9777
FabrikantnummerTIP32C
€ 0,49
Each (In a Pack of 5)
Aantal stuks
PNP 3 A 100 V TO-220 Through Hole 2 W Single 100 V 5 V - 3 1 9.15 x 10.4 x 4.6mm -
RS-stocknr. 803-1061
FabrikantnummerBC33725TFR
FabrikantON Semiconductor
€ 0,082
Each (In a Pack of 200)
Aantal stuks
NPN 800 mA 50 V TO-92 Through Hole 625 mW Single 10 V 5 V 50 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 169-8605
FabrikantnummerBC33725TFR
FabrikantON Semiconductor
€ 0,046
Each (On a Reel of 2000)
Aantal stuks
NPN 800 mA 50 V TO-92 Through Hole 625 mW Single 10 V 5 V 50 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 803-1068
FabrikantnummerBC33725TAR
FabrikantON Semiconductor
€ 0,071
Each (In a Pack of 200)
Aantal stuks
NPN 800 mA 50 V TO-92 Through Hole 625 mW Single 10 V 5 V 50 MHz 3 1 4.58 x 3.86 x 4.58mm -