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 734 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. 169-7397
Mfr. Part No.LMN200B02-7
€0.075
Each (On a Reel of 3000)
units
NPN + PNP 200 mA 50 V SOT-363 (SC-88) Surface Mount 200 mW N+P Loadswitch -50 V -5 V 200 MHz 6 2 2.2 x 1.35 x 1mm -
RS Stock No. 823-1435
Mfr. Part No.LMN200B02-7
€0.066
Each (In a Pack of 25)
units
NPN + PNP 200 mA 50 V SOT-363 (SC-88) Surface Mount 200 mW N+P Loadswitch -50 V -5 V 200 MHz 6 2 2.2 x 1.35 x 1mm -
RS Stock No. 711-4850
Mfr. Part No.BC856B-7-F
€0.064
Each (In a Pack of 100)
units
PNP 100 mA 65 V SOT-23 Surface Mount 300 mW Single -80 V -5 V 200 MHz 3 1 3 x 1.4 x 1.1mm -
RS Stock No. 885-5671
Mfr. Part No.ZTX857STZ
€0.551
Each (In a Pack of 10)
units
NPN 3 A 300 V TO-92 Through Hole 1.2 W Single 330 V 6 V 100 MHz 3 1 4.77 x 2.41 x 4.01mm -
RS Stock No. 122-3402
Mfr. Part No.ZTX857STZ
€0.452
Each (On a Reel of 2000)
units
NPN 3 A 300 V TO-92 Through Hole 1.2 W Single 330 V 6 V 100 MHz 3 1 4.77 x 2.41 x 4.01mm -
RS Stock No. 295-523
Mfr. Part No.ZTX751
€0.818
Each (In a Pack of 5)
units
PNP 2 A 60 V E-Line Through Hole 1 W Single 80 V 5 V 140 MHz 3 1 4.01 x 4.77 x 2.41mm -
RS Stock No. 121-9991
Mfr. Part No.FMMT624TA
€0.182
Each (On a Reel of 3000)
units
NPN 1 A 125 V SOT-23 Surface Mount 625 mW Single 125 V 5 V 155 MHz 3 1 1 x 2.9 x 1.3mm -
RS Stock No. 822-2150
Mfr. Part No.BC857BT-7-F
€0.011
Each (In a Pack of 200)
units
PNP 100 mA 45 V SOT-523 (SC-89) Surface Mount 150 mW Single -50 V -5 V 100 MHz 3 1 1.7 x 0.85 x 0.8mm -
RS Stock No. 922-7829
Mfr. Part No.FZT853TA
€0.389
Each (On a Reel of 1000)
units
NPN 6 A 100 V SOT-223 Surface Mount 3 W Single 200 V 6 V 130 MHz 3 + Tab 1 1.65 x 6.55 x 3.55mm -
RS Stock No. 165-8574
Mfr. Part No.FZT968TA
€0.416
Each (On a Reel of 1000)
units
PNP 6 A 12 V SOT-223 Surface Mount 3 W Single -15 V -6 V 80 MHz 3 + Tab 1 6.7 x 3.7 x 1.65mm -
RS Stock No. 823-1423
Mfr. Part No.FZT968TA
€0.781
Each (In a Pack of 10)
units
PNP 6 A 12 V SOT-223 Surface Mount 3 W Single -15 V -6 V 80 MHz 3 + Tab 1 6.7 x 3.7 x 1.65mm -
RS Stock No. 922-7746
Mfr. Part No.ZTX751
€0.313
Each (In a Box of 4000)
units
PNP 2 A 60 V E-Line Through Hole 1 W Single 80 V 5 V 140 MHz 3 1 4.01 x 4.77 x 2.41mm -
RS Stock No. 922-7702
Mfr. Part No.FZT653TA
€0.274
Each (On a Reel of 1000)
units
NPN 2 A 100 V SOT-223 Surface Mount 2 W Single 120 V 5 V 175 MHz 3 + Tab 1 1.65 x 6.7 x 3.7mm -
RS Stock No. 922-7734
Mfr. Part No.ZTX651
€0.313
Each (In a Box of 4000)
units
NPN 2 A 60 V E-Line Through Hole 1 W Single 80 V 5 V 175 MHz 3 1 4.01 x 4.77 x 2.41mm -
RS Stock No. 669-7644
Mfr. Part No.FMMT624TA
€0.51
Each
units
NPN 1 A 125 V SOT-23 Surface Mount 625 mW Single 125 V 5 V 155 MHz 3 1 1 x 2.9 x 1.3mm -
RS Stock No. 295-501
Mfr. Part No.ZTX651
€0.818
Each (In a Pack of 5)
units
NPN 2 A 60 V E-Line Through Hole 1 W Single 80 V 5 V 175 MHz 3 1 4.01 x 4.77 x 2.41mm -
RS Stock No. 215-6638
Mfr. Part No.FZT853TA
€0.88
Each
units
NPN 6 A 100 V SOT-223 Surface Mount 3 W Single 200 V 6 V 130 MHz 3 + Tab 1 1.65 x 6.55 x 3.55mm -
RS Stock No. 146-0563
Mfr. Part No.BC857BT-7-F
€0.011
Each (On a Reel of 3000)
units
PNP 100 mA 45 V SOT-523 (SC-89) Surface Mount 150 mW Single -50 V -5 V 100 MHz 3 1 1.7 x 0.85 x 0.8mm -
RS Stock No. 274-920
Mfr. Part No.FZT653TA
€0.654
Each (In a Pack of 5)
units
NPN 2 A 100 V SOT-223 Surface Mount 2 W Single 120 V 5 V 175 MHz 3 + Tab 1 1.65 x 6.7 x 3.7mm -
RS Stock No. 711-5017
Mfr. Part No.MMDT3946-7-F
€0.05
Each (In a Pack of 20)
units
NPN + PNP 200 mA 40 V SOT-363 (SC-88) Surface Mount 200 mW Isolated 60 V 6 V - 6 2 2.2 x 1.35 x 1mm -