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. 145-4563
Mfr. Part No.BD14016STU
SGD0.655
Each (In a Tube of 60)
units
PNP 1.5 A 80 V TO-126 Through Hole 12.5 W 40 Single -80 V -5 V - 3 1 -
RS Stock No. 669-7635
Mfr. Part No.ZTX951
SGD1.467
Each (In a Pack of 10)
units
PNP 4 A 60 V E-Line Through Hole 1.2 W 10 Single 100 V 6 V 120 MHz 3 1 -
RS Stock No. 166-1975
Mfr. Part No.KSE13003H2ASTU
SGD0.349
Each (In a Tube of 60)
units
NPN 1.5 A 400 V TO-126 Through Hole 20 W 5 Single 700 V 9 V - 3 1 -
RS Stock No. 178-4699
Mfr. Part No.MMBT2907ALT3G
SGD0.032
Each (On a Reel of 10000)
units
PNP 600 mA 60 V SOT-23 Surface Mount 225 mW, 300 mW, 350 mW 50 Single -60 V -5 V 100 MHz 3 1 -
RS Stock No. 145-3504
Mfr. Part No.MJE15029G
SGD1.039
Each (In a Tube of 50)
units
PNP 8 A 120 V TO-220AB Through Hole 50 W 20 Single 120 V 5 V 30 MHz 3 1 -
RS Stock No. 170-8031
Mfr. Part No.BC847BW,135
BrandNexperia
SGD0.027
Each (On a Reel of 10000)
units
NPN 100 mA 45 V SOT-323 Surface Mount 200 mW 110 Single 50 V 6 V - 3 1 AEC-Q101
RS Stock No. 484-5122
Mfr. Part No.BCP53-16,115
BrandNexperia
SGD0.314
Each (In a Pack of 25)
units
PNP 1 A 80 V SOT-223 (SC-73) Surface Mount 1 W 100 Single 100 V 5 V 145 MHz 4 1 -
RS Stock No. 145-3583
Mfr. Part No.2SB1122S-TD-E
SGD0.246
Each (On a Reel of 1000)
units
PNP 1 A 50 V PCP Surface Mount 1.3 W 30 Single -60 V -5 V 150 MHz 3 1 -
RS Stock No. 168-5846
Mfr. Part No.BUL216
SGD1.566
Each (In a Tube of 50)
units
NPN 4 A 800 V TO-220 Through Hole 9 W 10 Single 1600 V 9 V - 3 1 -
RS Stock No. 792-5256
Mfr. Part No.CPH5506-TL-E
SGD0.284
Each (On a Tape of 25)
units
NPN + PNP 1.5 A 30 V CPH Surface Mount 1.2 W 200 Common Emitter -30 V, 40 V 5 V 450 (NPN) MHz, 500 (PNP) MHz 5 2 -
RS Stock No. 791-6328
Mfr. Part No.PZT651T1G
SGD0.413
Each (On a Tape of 25)
units
NPN 2 A 60 V SOT-223 Surface Mount 800 mW 40 Single 80 V 5 V 100 MHz 3 + Tab 1 -
RS Stock No. 781-5102
Mfr. Part No.NSV40200LT1G
SGD0.598
Each (In a Pack of 20)
units
PNP 2 A 40 V SOT-23 Surface Mount 460 mW 150 Single -40 V dc -7 V 100 MHz 3 1 AEC-Q101
RS Stock No. 739-0410
Mfr. Part No.MMBT2907A
SGD0.213
Each (In a Pack of 10)
units
PNP 800 mA 60 V SOT-23 Surface Mount 350 mW 50 Single 60 V 5 V - 3 1 -
RS Stock No. 216-9404
Mfr. Part No.BC807-25W,115
BrandNexperia
SGD0.146
Each (In a Pack of 20)
units
PNP 500 mA 45 V UMT Surface Mount 200 mW 40 Single 50 V 5 V 80 MHz 3 1 -
RS Stock No. 122-2895
Mfr. Part No.DPLS350Y-13
SGD0.131
Each (On a Reel of 2500)
units
PNP 3 A 50 V SOT-89 Surface Mount 2 W 200 Single -50 V -6 V Minimum of 100 MHz 3 1 -
RS Stock No. 774-3212
Mfr. Part No.2N3055AG
SGD10.69
Each
units
NPN 15 A 60 V TO-204AA Through Hole 115 W 5 Single 100 V 7 V 1 MHz 2 1 -
RS Stock No. 669-7512
Mfr. Part No.FCX790ATA
SGD0.304
Each (In a Pack of 10)
units
PNP 2 A 40 V SOT-89 Surface Mount 2 W 150 Single 50 V 5 V 100 MHz 3 1 -
RS Stock No. 163-2354
Mfr. Part No.BC846BDW1T1G
SGD0.047
Each (On a Reel of 3000)
units
NPN 100 mA 65 V SOT-363 (SC-88) Surface Mount 380 mW 200 Isolated 80 V 6 V 100 MHz 6 2 -
RS Stock No. 145-3423
Mfr. Part No.BF721T1G
SGD0.118
Each (On a Reel of 1000)
units
PNP 50 mA 300 V SOT-223 Surface Mount 1.5 W 50 Single -300 V dc -300 V 60 MHz 3 + Tab 1 -
RS Stock No. 166-1556
Mfr. Part No.BCM857BV,115
BrandNexperia
SGD0.228
Each (On a Reel of 4000)
units
PNP 100 mA 45 V SSMini Surface Mount 300 mW 200 Isolated 50 V 5 V 175 MHz 6 2 -
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