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. 774-3678
FabrikantnummerTIP30CG
FabrikantON Semiconductor
0,407 €
Each (In a Pack of 10)
Aantal stuks
PNP 1 A 100 V TO-220AB Through Hole 30 W Single 100 V 5 V 1 MHz 3 1 10.28 x 4.82 x 15.75mm -
RS-stocknr. 170-3431
FabrikantnummerBC847BLT3G
FabrikantON Semiconductor
0,014 €
Each (On a Reel of 10000)
Aantal stuks
NPN 100 mA 45 V SOT-23 Surface Mount 300 mW Single 50 V 6 V 100 MHz 3 1 0.94 x 2.9 x 1.3mm -
RS-stocknr. 122-0070
FabrikantnummerMJ15004G
FabrikantON Semiconductor
3,918 €
Each (In a Tray of 100)
Aantal stuks
PNP 20 A 140 V TO-204AA Through Hole 250 W Single 140 V 5 V 2 MHz 2 1 39.37 x 26.67 x 8.51mm -
RS-stocknr. 862-4979
FabrikantnummerMJ21193G
FabrikantON Semiconductor
5,95 €
Each (In a Pack of 2)
Aantal stuks
PNP 16 A 250 V TO-204AA Through Hole 250 W Single -400 V -5 V - 2 1 39.37 x 26.67 x 8.51mm -
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. 822-2334
FabrikantnummerDDC123JU-7-F
FabrikantDiodesZetex
0,012 €
Each (In a Pack of 200)
Aantal stuks
NPN - 50 V SOT-363 (SC-88) Surface Mount 200 mW Isolated - 5 V - 6 2 2.2 x 1.35 x 1mm -
RS-stocknr. 714-6746
FabrikantnummerBU508AW
2,30 €
Each (In a Pack of 2)
Aantal stuks
NPN 8 A 700 V TO-247 Through Hole 125 W Single - 9 V - 3 1 20.15 x 15.75 x 5.15mm -
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. 146-0502
FabrikantnummerBC856BS,115
FabrikantNexperia
0,027 €
Each (On a Reel of 3000)
Aantal stuks
PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 300 mW Isolated -80 V -6 V - 6 2 2.2 x 1.35 x 1.1mm -
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. 781-4376
FabrikantnummerMMUN2133LT1G
FabrikantON Semiconductor
0,029 €
Each (In a Pack of 200)
Aantal stuks
PNP - 50 V SOT-23 Surface Mount 400 mW Single - - - 3 1 3.04 x 1.4 x 1.01mm -
RS-stocknr. 739-0385
FabrikantnummerKSP2222ABU
FabrikantON Semiconductor
0,148 €
Each (In a Pack of 10)
Aantal stuks
NPN 600 mA 40 V TO-92 Through Hole 625 mW Single 75 V 6 V - 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 484-5065
FabrikantnummerBC847C,215
FabrikantNexperia
0,095 €
Each (In a Pack of 50)
Aantal stuks
NPN 100 mA 45 V SOT-23 (TO-236AB) Surface Mount 250 mW Single 50 V 6 V 100 MHz 3 1 1 x 3 x 1.4mm -
RS-stocknr. 486-4577
FabrikantnummerMJE350
0,552 €
Each (In a Pack of 5)
Aantal stuks
PNP 500 mA 300 V SOT-32 Through Hole 20.8 W Single 300 V 3 V - 3 1 10.8 x 7.8 x 2.7mm -
RS-stocknr. 163-0976
FabrikantnummerMMUN2133LT1G
FabrikantON Semiconductor
0,016 €
Each (On a Reel of 3000)
Aantal stuks
PNP - 50 V SOT-23 Surface Mount 400 mW Single - - - 3 1 3.04 x 1.4 x 1.01mm -
RS-stocknr. 296-273A
FabrikantnummerMJ15004G
FabrikantON Semiconductor
6,502 €
Each (In a Pack of 5)
Aantal stuks
PNP 20 A 140 V TO-204AA Through Hole 250 W Single 140 V 5 V 2 MHz 2 1 39.37 x 26.67 x 8.51mm -
RS-stocknr. 124-1460
Fabrikantnummer2SC5200OTU
FabrikantON Semiconductor
2,353 €
Each (In a Tube of 25)
Aantal stuks
NPN 17 A 250 V TO-264 Through Hole 150 W Single 250 V 5 V 30 MHz 3 1 20 x 5 x 26mm -
RS-stocknr. 545-0236
FabrikantnummerMJ21194G
FabrikantON Semiconductor
5,95 €
Each
Aantal stuks
NPN 16 A 250 V TO-204 Through Hole 250 W Single 400 V 5 V 4 MHz 3 1 8.51 x 39.37 x 26.67mm -
RS-stocknr. 690-0091
FabrikantnummerBC847BLT3G
FabrikantON Semiconductor
0,091 €
Each (In a Pack of 25)
Aantal stuks
NPN 100 mA 45 V SOT-23 Surface Mount 300 mW Single 50 V 6 V 100 MHz 3 1 0.94 x 2.9 x 1.3mm -
RS-stocknr. 178-4767
FabrikantnummerTIP30CG
FabrikantON Semiconductor
0,407 €
Each (In a Tube of 50)
Aantal stuks
PNP 1 A 100 V TO-220AB Through Hole 30 W Single 100 V 5 V 1 MHz 3 1 10.28 x 4.82 x 15.75mm -