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. 166-2959
Mfr. Part No.2N5551BU
€0.032
Each (In a Bag of 10000)
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. 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. 805-1100
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. 802-3660
Mfr. Part No.MAT14ARZ
€9.44
Each
units
NPN 30 mA 40 V SOIC Surface Mount - 200 Isolated 40 V - 1 kHz 14 4 -
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. 109-078
Mfr. Part No.BD438
€0.572
Each (In a Pack of 5)
units
PNP 4 A 45 V SOT-32 Through Hole 36 W 30 Single 45 V 5 V 3 MHz 3 1 -
RS Stock No. 168-6169
Mfr. Part No.TIP31A
€0.464
Each (In a Tube of 50)
units
NPN 3 A 60 V TO-220 Through Hole 2 W 10 Single 60 V 5 V - 3 1 -
RS Stock No. 912-8116
Mfr. Part No.SSM2212RZ
€4.732
Each (In a Tube of 98)
units
NPN 20 mA 10 V SOIC Surface Mount - 200 Isolated 15 V - 10 kHz 8 2 -
RS Stock No. 671-1116
Mfr. Part No.BC33725TA
€0.22
Each (In a Pack of 10)
units
NPN 800 mA 45 V TO-92 Through Hole 625 mW 100 Single - 5 V 100 MHz 3 1 -
RS Stock No. 802-3679
Mfr. Part No.SSM2212RZ
€5.95
Each
units
NPN 20 mA 10 V SOIC Surface Mount - 200 Isolated 15 V - 10 kHz 8 2 -
RS Stock No. 796-9678
Mfr. Part No.BC337-25 A1
€0.15
Each (In a Pack of 250)
units
NPN 800 mA 45 V TO-92 Through Hole 625 mW 160 Single 50 V 5 V - 3 1 -
RS Stock No. 545-0264
Mfr. Part No.MJE15028G
€2.20
Each
units
NPN 8 A 120 V TO-220AB Through Hole 50 W 20 Single 120 V 5 V 30 MHz 3 1 -
RS Stock No. 102-4116
Mfr. Part No.2SD882
€0.55
Each (In a Tube of 50)
units
NPN 3 A 30 V SOT-32 Through Hole 12.5 W 30 Single 60 V 5 V 100 MHz 3 1 -
RS Stock No. 178-7139
Mfr. Part No.BC847BW,115
BrandNexperia
€0.018
Each (On a Reel of 3000)
units
- - - - - - - - - - - - - -
RS Stock No. 303-1596
Mfr. Part No.BC847BW,115
BrandNexperia
€0.22
Each (In a Pack of 10)
units
NPN 100 mA 45 V UMT Surface Mount 200 mW 200 Single 50 V 6 V 100 MHz 3 1 -
RS Stock No. 170-4152
Mfr. Part No.BC337-25 A1
€0.045
Each (On a Tape of 4000)
units
NPN 800 mA 45 V TO-92 Through Hole 625 mW 160 Single 50 V 5 V - 3 1 -
RS Stock No. 485-9749
Mfr. Part No.TIP31A
€0.558
Each (In a Pack of 5)
units
NPN 3 A 60 V TO-220 Through Hole 2 W 10 Single 60 V 5 V - 3 1 -
RS Stock No. 796-9707
Mfr. Part No.BC547B A1
€0.13
Each (In a Pack of 250)
units
NPN 100 mA 45 V TO-92 Through Hole 500 mW 200 Single 50 V 6 V - 3 1 -
RS Stock No. 170-4160
Mfr. Part No.BC547B A1
€0.037
Each (On a Tape of 4000)
units
NPN 100 mA 45 V TO-92 Through Hole 500 mW 200 Single 50 V 6 V - 3 1 -
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