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 madeA 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 transistorTransistors 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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Description Price 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 Stock No. 169-8696
Mfr. Part No.2N3906TAR
€0.028
Each (On a Reel of 2000)
units
PNP 200 mA 40 V TO-92 Through Hole 625 mW 60 Single -40 V -5 V 250 MHz 3 1 -
RS Stock No. 805-1059
Mfr. Part No.2N3906TA
€0.083
Each (In a Pack of 200)
units
PNP 200 mA 40 V TO-92 Through Hole 625 mW 60 Single -40 V -5 V 250 MHz 3 1 -
RS Stock No. 251-3564
Mfr. Part No.TIP35C
€2.22
Each
units
NPN 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS Stock No. 168-6056
Mfr. Part No.TIP35C
€1.477
Each (In a Tube of 30)
units
NPN 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS Stock No. 124-1314
Mfr. Part No.2N3906BU
€0.032
Each (In a Bag of 1000)
units
PNP 200 mA 40 V TO-92 Through Hole 625 mW 30 Single -40 V -5 V - 3 1 -
RS Stock No. 803-1093
Mfr. Part No.BC548BTA
€0.054
Each (In a Pack of 200)
units
NPN 100 mA 30 V TO-92 Through Hole 500 mW 110 Single 30 V 5 V 1 MHz 3 1 -
RS Stock No. 545-2210
Mfr. Part No.2N3055G
€5.15
Each
units
NPN 15 A 60 V TO-204 Through Hole 115 W 5 Single 100 V 7 V 2.5 MHz 3 1 -
RS Stock No. 146-0501
Mfr. Part No.BC846BPN,115
BrandNexperia
€0.025
Each (On a Reel of 3000)
units
NPN + PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 300 mW 200 Isolated -80 V, 80 V 6 (NPN) V, -6 (PNP) V - 6 2 -
RS Stock No. 796-9710
Mfr. Part No.BC548A A1
€0.13
Each (In a Pack of 250)
units
NPN 100 mA 30 V TO-92 Through Hole 500 mW 110 Single 30 V 6 V - 3 1 -
RS Stock No. 103-2964
Mfr. Part No.2N3055G
€3.795
Each (In a Tray of 100)
units
NPN 15 A 60 V TO-204AA Through Hole 115 W 5 Single 100 V 7 V 2.5 MHz 2 1 -
RS Stock No. 711-4850
Mfr. Part No.BC856B-7-F
€0.052
Each (In a Pack of 100)
units
PNP 100 mA 65 V SOT-23 Surface Mount 300 mW 220 Single -80 V -5 V 200 MHz 3 1 -
RS Stock No. 166-3209
Mfr. Part No.2N5551TF
€0.032
Each (On a Reel of 2000)
units
NPN 600 mA 160 V TO-92 Through Hole 625 mW 80 Single 180 V 6 V 100 MHz 3 1 -
RS Stock No. 160-0656
Mfr. Part No.MAT14ARZ
€7.514
Each (In a Tube of 56)
units
NPN 30 mA 40 V SOIC Surface Mount - 200 Isolated 40 V - 1 kHz 14 4 -
RS Stock No. 805-1100
Mfr. Part No.2N5551BU
€0.075
Each (In a Pack of 200)
units
NPN 600 mA 160 V TO-92 Through Hole 625 mW 80 Single 180 V 6 V 100 MHz 3 1 -
RS Stock No. 792-0807
Mfr. Part No.BC846BPN,115
BrandNexperia
€0.083
Each (On a Reel of 100)
units
NPN + PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 300 mW 200 Isolated -80 V, 80 V 6 (NPN) V, -6 (PNP) V - 6 2 -
RS Stock No. 805-1104
Mfr. Part No.2N5551TA
€0.024
Each (In a Pack of 200)
units
NPN 600 mA 160 V TO-92 Through Hole 625 mW 80 Single 180 V 6 V 100 MHz 3 1 -
RS Stock No. 170-4161
Mfr. Part No.BC548A A1
€0.037
Each (On a Tape of 4000)
units
NPN 100 mA 30 V TO-92 Through Hole 500 mW 110 Single 30 V 6 V - 3 1 -
RS Stock No. 169-3158
Mfr. Part No.BD911
€2.22
Each
units
NPN 15 A 100 V TO-220 Through Hole 90 W 5 Single 100 V 5 V 3 MHz 3 1 -
RS Stock No. 805-1113
Mfr. Part No.2N5551TF
€0.064
Each (In a Pack of 200)
units
NPN 600 mA 160 V TO-92 Through Hole 625 mW 80 Single 180 V 6 V 100 MHz 3 1 -
RS Stock No. 911-4701
Mfr. Part No.BC857BE6327HTSA1
BrandInfineon
€0.016
Each (On a Reel of 3000)
units
PNP 100 mA 45 V SOT-23 Surface Mount 250 mW 220 Single -50 V -5 V - 3 1 -
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