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. 796-9717
FabrikantnummerBC548C A1
€ 0,114
Each (In a Pack of 250)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 518-1700
FabrikantnummerPBSS4480X,135
FabrikantNexperia
€ 0,096
Each (In a Pack of 10)
Aantal stuks
NPN 4 A 80 V UPAK Surface Mount 2.5 W Single 80 V 5 V 150 MHz 4 1 1.6 x 4.6 x 2.6mm -
RS-stocknr. 170-4162
FabrikantnummerBC548C A1
€ 0,029
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 251-3564
FabrikantnummerTIP35C
€ 1,70
Each
Aantal stuks
NPN 25 A 100 V TO-247 Through Hole 125 W Single 100 V 5 V 3 MHz 3 1 20.15 x 15.75 x 5.15mm -
RS-stocknr. 168-6055
FabrikantnummerTIP36C
€ 1,483
Each (In a Tube of 30)
Aantal stuks
PNP 25 A 100 V TO-247 Through Hole 125 W Single 100 V 5 V 3 MHz 3 1 20.15 x 15.75 x 5.15mm -
RS-stocknr. 796-9713
FabrikantnummerBC548B A1
€ 0,103
Each (In a Pack of 250)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 251-3558
FabrikantnummerTIP36C
€ 1,732
Each (In a Pack of 5)
Aantal stuks
PNP 25 A 100 V TO-247 Through Hole 125 W Single 100 V 5 V 3 MHz 3 1 20.15 x 15.75 x 5.15mm -
RS-stocknr. 146-2333
FabrikantnummerBC548B A1
€ 0,029
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 168-6056
FabrikantnummerTIP35C
€ 1,438
Each (In a Tube of 30)
Aantal stuks
NPN 25 A 100 V TO-247 Through Hole 125 W Single 100 V 5 V 3 MHz 3 1 20.15 x 15.75 x 5.15mm -
RS-stocknr. 739-0442
Fabrikantnummer2N3904TA
FabrikantON Semiconductor
€ 0,129
Each (In a Pack of 10)
Aantal stuks
NPN 200 mA 40 V TO-92 Through Hole 625 mW Single 60 V 6 V 300 MHz 3 1 5.2 x 4.19 x 5.33mm -
RS-stocknr. 805-1056
Fabrikantnummer2N3904TFR
FabrikantON Semiconductor
€ 0,05
Each (In a Pack of 200)
Aantal stuks
NPN 200 mA 40 V TO-92 Through Hole 625 mW Single 60 V 6 V 300 MHz 3 1 5.2 x 4.19 x 5.33mm -
RS-stocknr. 843-1575
Fabrikantnummer2N3904BU
FabrikantON Semiconductor
€ 0,117
Each (In a Pack of 50)
Aantal stuks
NPN 200 mA 40 V TO-92 Through Hole 625 mW Single 60 V 6 V 100 MHz 3 1 5.2 x 4.19 x 5.33mm -
RS-stocknr. 842-8015
Fabrikantnummer2N3904BU
FabrikantON Semiconductor
€ 0,033
Each (In a Bag of 1000)
Aantal stuks
NPN 200 mA 40 V TO-92 Through Hole 625 mW Single 60 V 6 V 100 MHz 3 1 5.2 x 4.19 x 5.33mm -
RS-stocknr. 124-1317
Fabrikantnummer2N3904TA
FabrikantON Semiconductor
€ 0,028
Each (On a Reel of 2000)
Aantal stuks
NPN 200 mA 40 V TO-92 Through Hole 625 mW Single 60 V 6 V 300 MHz 3 1 5.2 x 4.19 x 5.33mm -
RS-stocknr. 805-1043
Fabrikantnummer2N3904TAR
FabrikantON Semiconductor
€ 0,051
Each (In a Pack of 200)
Aantal stuks
NPN 200 mA 40 V TO-92 Through Hole 625 mW Single 60 V 6 V 300 MHz 3 1 5.2 x 4.19 x 5.33mm -
RS-stocknr. 122-0088
FabrikantnummerMJ15022G
FabrikantON Semiconductor
€ 4,251
Each (In a Tray of 100)
Aantal stuks
NPN 16 A 200 V TO-204 Through Hole 250 W Single 350 V 5 V 4 MHz 3 1 8.51 x 39.37 x 26.67mm -
RS-stocknr. 544-9696
FabrikantnummerMJ15022G
FabrikantON Semiconductor
€ 5,95
Each
Aantal stuks
NPN 16 A 200 V TO-204 Through Hole 250 W Single 350 V 5 V 4 MHz 3 1 8.51 x 39.37 x 26.67mm -
RS-stocknr. 166-1974
FabrikantnummerBC547CTFR
FabrikantON Semiconductor
€ 0,033
Each (On a Reel of 2000)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW Single 50 V 6 V 1 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 163-2108
FabrikantnummerCPH5518-TL-H
FabrikantON Semiconductor
€ 0,148
Each (On a Reel of 3000)
Aantal stuks
NPN + PNP 1 A 50 V CPH Surface Mount 1.2 W Common Emitter 80 V -5 V, 5 V 420 MHz 5 2 2.9 x 1.6 x 0.9mm -
RS-stocknr. 805-1065
Fabrikantnummer2N3906TFR
FabrikantON Semiconductor
€ 0,05
Each (In a Pack of 200)
Aantal stuks
PNP 200 mA 40 V TO-92 Through Hole 625 mW Single -40 V -5 V 250 MHz 3 1 5.2 x 4.19 x 5.33mm -