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).


...
Read more Read less

Filters

Viewing 1 - 20 of 167 products
Results per page
Description Price 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 Stock No. 103-1578
Mfr. Part No.BU508AW
SGD3.507
Each (In a Tube of 30)
units
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 Stock No. 714-6746
Mfr. Part No.BU508AW
SGD4.135
Each (In a Pack of 2)
units
NPN 8 A 700 V TO-247 Through Hole 125 W Single - 9 V - 3 1 20.15 x 15.75 x 5.15mm -65 °C
RS Stock No. 314-1817
Mfr. Part No.BD140
SGD0.88
Each
units
PNP 3 A 80 V SOT-32 Through Hole 1.25 W Single 80 V 5 V - 3 1 10.8 x 7.8 x 2.7mm -65 °C
RS Stock No. 168-6074
Mfr. Part No.BD140
SGD0.735
Each (In a Tube of 50)
units
PNP 3 A 80 V SOT-32 Through Hole 1.25 W Single 80 V 5 V - 3 1 10.8 x 7.8 x 2.7mm -
RS Stock No. 168-6171
Mfr. Part No.TIP41C
SGD0.82
Each (In a Tube of 50)
units
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 Stock No. 168-6437
Mfr. Part No.BUL128D-B
SGD0.803
Each (In a Tube of 50)
units
NPN 4 A 400 V TO-220 Through Hole 70 W Single 700 V 9 V - 3 1 9.15 x 10.4 x 4.6mm -
RS Stock No. 168-6165
Mfr. Part No.TIP2955
SGD2.552
Each (In a Tube of 30)
units
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 Stock No. 485-9812
Mfr. Part No.TIP41C
SGD1.27
Each (In a Pack of 5)
units
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 -65 °C
RS Stock No. 686-8048
Mfr. Part No.BUL128D-B
SGD0.803
Each (In a Pack of 10)
units
NPN 4 A 400 V TO-220 Through Hole 70 W Single 700 V 9 V - 3 1 9.15 x 10.4 x 4.6mm -65 °C
RS Stock No. 168-6168
Mfr. Part No.TIP3055
SGD1.183
Each (In a Tube of 30)
units
NPN 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 Stock No. 485-9727
Mfr. Part No.TIP3055
SGD1.432
Each (In a Pack of 5)
units
NPN 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 -65 °C
RS Stock No. 485-9705
Mfr. Part No.TIP2955
SGD3.004
Each (In a Pack of 5)
units
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 -65 °C
RS Stock No. 169-3164
Mfr. Part No.BD912
SGD2.18
Each
units
PNP 15 A 100 V TO-220 Through Hole 90 W Single 100 V 5 V 3 MHz 3 1 9.15 x 10.4 x 4.6mm -65 °C
RS Stock No. 485-9749
Mfr. Part No.TIP31A
SGD1.246
Each (In a Pack of 5)
units
NPN 3 A 60 V TO-220 Through Hole 2 W Single 60 V 5 V - 3 1 9.15 x 10.4 x 4.6mm -65 °C
RS Stock No. 168-6045
Mfr. Part No.BD912
SGD1.637
Each (In a Tube of 50)
units
PNP 15 A 100 V TO-220 Through Hole 90 W Single 100 V 5 V 3 MHz 3 1 9.15 x 10.4 x 4.6mm -
RS Stock No. 314-1823
Mfr. Part No.BD139
SGD0.93
Each
units
NPN 3 A 80 V SOT-32 Through Hole 1.25 W Single 80 V 5 V - 3 1 10.8 x 7.8 x 2.7mm -65 °C
RS Stock No. 168-6075
Mfr. Part No.BD139
SGD0.741
Each (In a Tube of 50)
units
NPN 3 A 80 V SOT-32 Through Hole 1.25 W Single 80 V 5 V - 3 1 10.8 x 7.8 x 2.7mm -
RS Stock No. 168-6169
Mfr. Part No.TIP31A
SGD0.779
Each (In a Tube of 50)
units
NPN 3 A 60 V TO-220 Through Hole 2 W Single 60 V 5 V - 3 1 9.15 x 10.4 x 4.6mm -
RS Stock No. 168-6253
Mfr. Part No.MJE2955T
SGD2.134
Each (In a Tube of 50)
units
PNP 10 A 60 V TO-220 Through Hole 75 W Single 70 V 5 V 2 MHz 3 1 9.15 x 10.4 x 4.6mm -
RS Stock No. 486-4561
Mfr. Part No.MJE2955T
SGD2.558
Each (In a Pack of 5)
units
PNP 10 A 60 V TO-220 Through Hole 75 W Single 70 V 5 V 2 MHz 3 1 9.15 x 10.4 x 4.6mm -55 °C