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. 314-1823
FabrikantnummerBD139
€ 0,51
Each
Aantal stuks
NPN 3 A 80 V SOT-32 Through Hole 1.25 W 25 Single 80 V 5 V - 3 1 -
RS-stocknr. 168-6075
FabrikantnummerBD139
€ 0,421
Each (In a Tube of 50)
Aantal stuks
NPN 3 A 80 V SOT-32 Through Hole 1.25 W 25 Single 80 V 5 V - 3 1 -
RS-stocknr. 103-1438
FabrikantnummerBUTW92
€ 5,222
Each (In a Tube of 30)
Aantal stuks
NPN 60 A 250 V TO-247 Through Hole 180 W 6 Single 500 V 7 V - 3 1 -
RS-stocknr. 686-7985
FabrikantnummerBUTW92
€ 7,62
Each
Aantal stuks
NPN 60 A 250 V TO-247 Through Hole 180 W 6 Single 500 V 7 V - 3 1 -
RS-stocknr. 314-1817
FabrikantnummerBD140
€ 1,07
Each
Aantal stuks
PNP 3 A 80 V SOT-32 Through Hole 1.25 W 25 Single 80 V 5 V - 3 1 -
RS-stocknr. 168-6074
FabrikantnummerBD140
€ 0,433
Each (In a Tube of 50)
Aantal stuks
PNP 3 A 80 V SOT-32 Through Hole 1.25 W 25 Single 80 V 5 V - 3 1 -
RS-stocknr. 168-6055
FabrikantnummerTIP36C
€ 1,46
Each (In a Tube of 30)
Aantal stuks
PNP 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS-stocknr. 168-6056
FabrikantnummerTIP35C
€ 1,431
Each (In a Tube of 30)
Aantal stuks
NPN 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS-stocknr. 251-3564
FabrikantnummerTIP35C
€ 2,31
Each
Aantal stuks
NPN 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS-stocknr. 251-3558
FabrikantnummerTIP36C
€ 1,80
Each (In a Pack of 5)
Aantal stuks
PNP 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS-stocknr. 486-4577
FabrikantnummerMJE350
€ 0,604
Each (In a Pack of 5)
Aantal stuks
PNP 500 mA 300 V SOT-32 Through Hole 20.8 W 30 Single 300 V 3 V - 3 1 -
RS-stocknr. 168-6254
FabrikantnummerMJE350
€ 0,451
Each (In a Tube of 50)
Aantal stuks
PNP 500 mA 300 V SOT-32 Through Hole 20.8 W 30 Single 300 V 3 V - 3 1 -
RS-stocknr. 485-9755
FabrikantnummerTIP31C
€ 0,588
Each (In a Pack of 5)
Aantal stuks
NPN 3 A 100 V TO-220 Through Hole 2 W 10 Single 100 V 5 V - 3 1 -
RS-stocknr. 485-9705
FabrikantnummerTIP2955
€ 1,672
Each (In a Pack of 5)
Aantal stuks
PNP 15 A 60 V TO-247 Through Hole 90 W 5 Single 100 V - 3 MHz 3 1 -
RS-stocknr. 168-6165
FabrikantnummerTIP2955
€ 1,412
Each (In a Tube of 30)
Aantal stuks
PNP 15 A 60 V TO-247 Through Hole 90 W 5 Single 100 V - 3 MHz 3 1 -
RS-stocknr. 178-1437
FabrikantnummerTIP31C
€ 0,402
Each (In a Tube of 50)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 168-6073
FabrikantnummerMJE3055T
€ 0,598
Each (In a Tube of 50)
Aantal stuks
NPN 10 A 60 V TO-220 Through Hole 75 W 5 Single 70 V 5 V 2 MHz 3 1 -
RS-stocknr. 485-9856
FabrikantnummerTIP50
€ 0,726
Each (In a Pack of 5)
Aantal stuks
NPN 1 A 400 V TO-220 Through Hole 2 W 10 Single 500 V 5 V 10 MHz 3 1 -
RS-stocknr. 168-6173
FabrikantnummerTIP50
€ 0,516
Each (In a Tube of 50)
Aantal stuks
NPN 1 A 400 V TO-220 Through Hole 2 W 10 Single 500 V 5 V 10 MHz 3 1 -
RS-stocknr. 313-6916
FabrikantnummerMJE3055T
€ 0,72
Each
Aantal stuks
NPN 10 A 60 V TO-220 Through Hole 75 W 5 Single 70 V 5 V 2 MHz 3 1 -