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 made
A 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 transistor
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.
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).

...
Read more Read less

Filters

Viewing 1 - 20 of 53 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 Maximum Base Emitter Saturation Voltage
RS Stock No. 544-901
Mfr. Part No.2SC3601E
BrandSanyo
HK$10.20
Each (In a Pack of 5)
units
NPN 150 mA 200 V TO-126 Through Hole 1.2 W - 200 V 4 V 400 MHz 3 1 11 x 8 x 2.7mm 1 V
RS Stock No. 663-8493
Mfr. Part No.2SC2909S-AA
BrandSanyo
HK$2.02
Each (In a Pack of 5)
units
NPN 5 A 160 V NP Through Hole 600 mW - 180 V 5 V 150 MHz 3 1 5 x 4 x 5mm -
RS Stock No. 663-8932
Mfr. Part No.CPH3215-TL-E
BrandSanyo
HK$2.93
Each (In a Pack of 5)
units
NPN 1.5 A 30 V CPH Surface Mount 900 mW - 40 V 5 V 500 MHz 3 1 2.9 x 1.6 x 0.9mm 1.2 V
RS Stock No. 663-8834
Mfr. Part No.2SD1815S-TL-E
BrandSanyo
HK$6.65
Each (In a Pack of 5)
units
NPN 3 A 100 V TP FA Surface Mount 20 W - 120 V 6 V 180 MHz 4 1 6.5 x 5.5 x 2.3mm 1.2 V
RS Stock No. 663-8412
Mfr. Part No.CPH3115-TL-E
BrandSanyo
HK$2.83
Each (In a Pack of 5)
units
PNP 1.5 A -30 V CPH Surface Mount 900 mW - -30 V -5 V 450 MHz 3 1 2.9 x 1.6 x 0.9mm -1.2 V
RS Stock No. 663-8235
Mfr. Part No.2SA1700E-TL-E
BrandSanyo
HK$7.05
Each (In a Pack of 5)
units
PNP 200 mA -400 V TP FA Surface Mount 10 W - -400 V -5 V 70 MHz 4 1 6.5 x 5.5 x 2.3mm -1 V
RS Stock No. 663-8724
Mfr. Part No.2SC5566-TD-E
BrandSanyo
HK$4.34
Each (In a Pack of 5)
units
NPN 4 A 100 V PCP Surface Mount 3.5 W - 100 V 6 V 400 MHz 3 1 4.5 x 2.5 x 1.5mm 1.2 V
RS Stock No. 544-777
Mfr. Part No.2SA1770S-AN
BrandSanyo
HK$2.63
Each (In a Pack of 5)
units
PNP 1.5 A -160 V NMP Through Hole 1 W - -180 V -6 V 120 MHz 3 1 6.9 x 2.5 x 4.5mm -1.2 V
RS Stock No. 663-8601
Mfr. Part No.2SC4002E-AA
BrandSanyo
HK$4.45
Each (In a Pack of 5)
units
NPN 200 mA 400 V NP Through Hole 600 mW - 400 V 5 V 70 MHz 3 1 5 x 4 x 5mm 1 V
RS Stock No. 663-8929
Mfr. Part No.CPH3209-TL-E
BrandSanyo
HK$4.14
Each (In a Pack of 5)
units
NPN 3 A 30 V CPH Surface Mount 900 mW - 40 V 5 V 450 MHz 3 1 2.9 x 1.6 x 0.9mm 1.2 V
RS Stock No. 663-9005
Mfr. Part No.CPH6519-TL-E
BrandSanyo
HK$4.95
Each (In a Pack of 5)
units
NPN 100 mA 50 V CPH Surface Mount 350 mW - 60 V 15 V 200 MHz 6 2 2.9 x 1.6 x 0.9mm 1.1 V
RS Stock No. 663-8339
Mfr. Part No.2SB1166S
BrandSanyo
HK$7.40
Each (In a Pack of 5)
units
PNP 8 A 50 V TO-126LP Through Hole 1.2 W - 60 V 6 V 130 MHz 3 1 11 x 8 x 2.7mm 1.3 V
RS Stock No. 663-8604
Mfr. Part No.2SC4003E-TL-E
BrandSanyo
HK$5.05
Each (In a Pack of 5)
units
NPN 200 mA 400 V TP FA Surface Mount 10 W - 400 V 5 V 70 MHz 4 1 6.5 x 5.5 x 2.3mm 1 V
RS Stock No. 663-8471
Mfr. Part No.15C02MH-TL-E
BrandSanyo
HK$1.92
Each (In a Pack of 10)
units
NPN 1 A 15 V MCPH Surface Mount 600 mW - 20 V 5 V 440 MHz 3 1 2 x 1.6 x 0.85mm 1.2 V
RS Stock No. 663-8525
Mfr. Part No.2SC3332S-AA
BrandSanyo
HK$3.44
Each (In a Pack of 5)
units
NPN 700 mA 160 V NP Through Hole 700 mW - 180 V 6 V 120 MHz 3 1 5 x 4 x 5mm 1.2 V
RS Stock No. 545-051
Mfr. Part No.2SD1725S
BrandSanyo
HK$6.85
Each (In a Pack of 5)
units
NPN 4 A 100 V TO-126LP Through Hole 1.2 W - 120 V 6 V 130 MHz 3 1 11 x 8 x 2.7mm 1.2 V
RS Stock No. 546-385
Mfr. Part No.SCH2102-TL-E
BrandSanyo
HK$2.12
Each (In a Pack of 10)
units
PNP 500 mA -12 V SCH Surface Mount 400 mW - -15 V -5 V 490 MHz 6 2 1.6 x 1.5 x 0.56mm -1.2 V
RS Stock No. 663-8771
Mfr. Part No.2SD1207T-AE
BrandSanyo
HK$2.42
Each (In a Pack of 5)
units
NPN 2 A 50 V MP Through Hole 1 W - 60 V 6 V 150 MHz 3 1 6 x 4.7 x 8.5mm 1.2 V
RS Stock No. 663-8468
Mfr. Part No.15C02CH-TL-E
BrandSanyo
HK$1.41
Each (In a Pack of 10)
units
NPN 1 A 15 V CPH Surface Mount 700 mW - 20 V 5 V 440 MHz 3 1 2.9 x 1.6 x 0.9mm 1.2 V
RS Stock No. 663-9027
Mfr. Part No.MCH6544-TL-E
BrandSanyo
HK$3.13
Each (In a Pack of 5)
units
NPN 500 mA 50 V MCPH Surface Mount 550 mW - 60 V 5 V 500 MHz 6 1 2 x 1.6 x 0.85mm 1.2 V