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. 545-0236
Mfr. Part No.MJ21194G
MYR28.25
Each
units
NPN 16 A 250 V TO-204 Through Hole 250 W 25 Single 400 V 5 V 4 MHz 3 1 -
RS Stock No. 803-1068
Mfr. Part No.BC33725TAR
MYR0.284
Each (In a Pack of 200)
units
NPN 800 mA 50 V TO-92 Through Hole 625 mW 100 Single 10 V 5 V 50 MHz 3 1 -
RS Stock No. 781-5250
Mfr. Part No.SMMBTA56LT1G
MYR1.009
Each (In a Pack of 50)
units
PNP 500 mA 80 V SOT-23 Surface Mount 225 mW 100 Single -80 V dc -4 V 100 MHz 3 1 AEC-Q101
RS Stock No. 756-0262
Mfr. Part No.2SC5199-O(Q)
BrandToshiba
MYR15.11
Each
units
NPN 12 A 160 V TO-3PL Through Hole 120 W 80 Single 160 V 5 V 30 MHz 3 1 -
RS Stock No. 122-0070
Mfr. Part No.MJ15004G
MYR19.443
Each (In a Tray of 100)
units
PNP 20 A 140 V TO-204AA Through Hole 250 W 25 Single 140 V 5 V 2 MHz 2 1 -
RS Stock No. 166-3239
Mfr. Part No.KSC2690AYS
MYR0.865
Each (In a Bag of 2000)
units
NPN 1.2 A 160 V TO-126 Through Hole 20 W 60 Single 160 V 5 V - 3 1 -
RS Stock No. 296-273
Mfr. Part No.MJ15004G
MYR26.50
Each
units
PNP 20 A 140 V TO-204AA Through Hole 250 W 25 Single 140 V 5 V 2 MHz 2 1 -
RS Stock No. 803-1061
Mfr. Part No.BC33725TFR
MYR0.401
Each (In a Pack of 200)
units
NPN 800 mA 50 V TO-92 Through Hole 625 mW 100 Single 10 V 5 V 50 MHz 3 1 -
RS Stock No. 178-7544
Mfr. Part No.BC33725TAR
MYR0.155
Each (In a Bag of 2000)
units
- - - - - - - - - - - - - -
RS Stock No. 445-2219
Mfr. Part No.BFR92PE6327HTSA1
BrandInfineon
MYR1.16
Each (In a Pack of 10)
units
NPN 45 mA 15 V SOT-23 Surface Mount 280 mW 70 Single 20 V 2.5 V 5000 MHz 3 1 -
RS Stock No. 445-2146
Mfr. Part No.BDP949
BrandInfineon
MYR3.266
Each (In a Pack of 5)
units
NPN 3 A 60 V SOT-223 Surface Mount 5 W 25 Single 60 V 5 V 100 MHz 3 + Tab 1 -
RS Stock No. 145-4546
Mfr. Part No.KSB772YSTU
MYR1.499
Each (In a Tube of 60)
units
PNP 3 A 30 V TO-126 Through Hole 10 W 30 Single -40 V -5 V 80 MHz 3 1 -
RS Stock No. 922-7740
Mfr. Part No.ZTX753
MYR1.721
Each (In a Bag of 4000)
units
PNP 2 A 100 V E-Line Through Hole 1 W - Single 120 V 5 V 140 MHz 3 1 -
RS Stock No. 739-0423
Mfr. Part No.KSB772YSTU
MYR1.804
Each (In a Pack of 5)
units
PNP 3 A 30 V TO-126 Through Hole 10 W 30 Single -40 V -5 V 80 MHz 3 1 -
RS Stock No. 177-5497
Mfr. Part No.2N2222ADCSM
BrandSemelab
MYR135.47
Each (In a Tray of 100)
units
NPN 800 mA 50 V LCC 2 Surface Mount 500 mW 50 Isolated 75 V 6 V 250 MHz 6 2 -
RS Stock No. 903-4077
Mfr. Part No.2SC5200OTU
MYR12.71
Each (In a Pack of 5)
units
NPN 17 A 250 V TO-264 Through Hole 150 W 55 Single 250 V 5 V 30 MHz 3 1 -
RS Stock No. 890-2645
Mfr. Part No.2SC3324-BL(TE85L,F
BrandToshiba
MYR0.735
Each (In a Pack of 25)
units
NPN 100 mA 120 V SOT-346 (SC-59) Surface Mount 150 mW 200 Single 120 V 120 V - 3 1 -
RS Stock No. 922-7875
Mfr. Part No.ZDT6790TA
MYR2.10
Each (On a Reel of 1000)
units
NPN + PNP 2 A 40 V, 45 V SM Surface Mount 2.75 W 150 Isolated 45 V 5 V 150 MHz 8 2 -
RS Stock No. 738-7575
Mfr. Part No.2N2222ADCSM
BrandSemelab
MYR148.99
Each
units
NPN 800 mA 50 V LCC 2 Surface Mount 500 mW 50 Isolated 75 V 6 V 250 MHz 6 2 -
RS Stock No. 842-7936
Mfr. Part No.NSM4002MR6T1G
MYR0.525
Each (In a Pack of 100)
units
NPN 500 mA 40 V, 45 V SC-74 Surface Mount 260 mW 100 Complex 40 V, 45 V 5 V, 6 V 300 (Min.) MHz 6 2 -
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