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 61 - 80 of 4830 products
Results per page
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. 170-4153
Mfr. Part No.BC338-16 A1
HK$0.199
Each (On a Tape of 4000)
units
NPN 800 mA 25 V TO-92 Through Hole 625 mW 100 Single 30 V 5 V - 3 1 -
RS Stock No. 166-1312
Mfr. Part No.BC857C,215
BrandNexperia
HK$0.10
Each (On a Reel of 3000)
units
PNP 100 mA 45 V SOT-23 (TO-236AB) Surface Mount 250 mW 420 Single 50 V 5 V 100 MHz 3 1 -
RS Stock No. 796-9681
Mfr. Part No.BC338-16 A1
HK$0.303
Each (In a Pack of 250)
units
NPN 800 mA 25 V TO-92 Through Hole 625 mW 100 Single 30 V 5 V - 3 1 -
RS Stock No. 112-5475
Mfr. Part No.PZT2907A,115
BrandNexperia
HK$3.498
Each (In a Pack of 5)
units
PNP 600 mA 60 V SOT-223 (SC-73) Surface Mount 1.15 W 50 Single 60 V 5 V 200 MHz 4 1 -
RS Stock No. 163-1098
Mfr. Part No.NSS40201LT1G
HK$0.911
Each (On a Reel of 3000)
units
NPN 2 A 40 V SOT-23 Surface Mount 460 mW 180 Single 40 V dc 6 V 100 MHz 3 1 -
RS Stock No. 121-9550
Mfr. Part No.DSS4240T-7
HK$0.528
Each (On a Reel of 3000)
units
NPN 2 A 40 V SOT-23 Surface Mount 600 mW 150 Single 40 V 5 V 100 MHz 3 1 -
RS Stock No. 124-9936
Mfr. Part No.2N3055AG
HK$28.672
Each (In a Tray of 100)
units
NPN 15 A 60 V TO-204 Through Hole 115 W 5 Single 100 V 7 V 1 MHz 2 1 -
RS Stock No. 751-4290
Mfr. Part No.DSS4240T-7
HK$0.927
Each (On a Tape of 100)
units
NPN 2 A 40 V SOT-23 Surface Mount 600 mW 150 Single 40 V 5 V 100 MHz 3 1 -
RS Stock No. 215-6600
Mfr. Part No.FZT849TA
HK$15.71
Each
units
NPN 7 A 30 V SOT-223 Surface Mount 3 W 30 Single 80 V 6 V 100 MHz 3 + Tab 1 -
RS Stock No. 438-4598
Mfr. Part No.BCP53,115
BrandNexperia
HK$0.675
Each (On a Reel of 1000)
units
PNP 1 A 80 V SOT-223 (SC-73) Surface Mount 1 W 40 Single 100 V 5 V 145 MHz 4 1 -
RS Stock No. 806-4475
Mfr. Part No.KSC1845FTA
HK$0.811
Each (In a Pack of 200)
units
NPN 50 mA 120 V TO-92 Through Hole 500 mW 150 Single 120 V 5 V 110 MHz 3 1 -
RS Stock No. 669-7593
Mfr. Part No.FZT957TA
HK$10.644
Each (In a Pack of 5)
units
PNP 1 A 300 V SOT-223 Surface Mount 3 W 90 Single 300 V 6 V 85 MHz 3 + Tab 1 -
RS Stock No. 170-4155
Mfr. Part No.BC546B A1
HK$0.187
Each (On a Tape of 4000)
units
NPN 100 mA 65 V TO-92 Through Hole 500 mW 200 Single 80 V 6 V - 3 1 -
RS Stock No. 508-236
Mfr. Part No.BC857C,215
BrandNexperia
HK$0.33
Each (In a Pack of 100)
units
PNP 100 mA 45 V SOT-23 (TO-236AB) Surface Mount 250 mW 420 Single 50 V 5 V 100 MHz 3 1 -
RS Stock No. 774-3568
Mfr. Part No.MJE13007G
HK$8.548
Each (In a Pack of 5)
units
NPN 8 A 400 V TO-220AB Through Hole 80 W 5 Single 700 V 9 V 1 MHz 3 1 -
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 140 - 180 V 5 V 150 MHz 3 1 -
RS Stock No. 146-2100
Mfr. Part No.BC556BTFR
HK$0.207
Each (On a Reel of 2000)
units
PNP 100 mA 65 V TO-92 Through Hole 500 mW 110 Single -80 V -5 V 10 MHz 3 1 -
RS Stock No. 178-7164
Mfr. Part No.BCX70H,215
BrandNexperia
HK$0.222
Each (On a Reel of 3000)
units
- - - - - - - - - - - - - -
RS Stock No. 796-9694
Mfr. Part No.BC546C A1
HK$0.314
Each (In a Pack of 250)
units
NPN 100 mA 65 V TO-92 Through Hole 500 mW 420 Single 80 V 6 V - 3 1 -
RS Stock No. 170-4150
Mfr. Part No.BC337-40 A1
HK$0.199
Each (On a Tape of 4000)
units
NPN 800 mA 45 V TO-92 Through Hole 625 mW 250 Single 50 V 5 V - 3 1 -
Related Products
Advanced 74VHC High-Speed silicon-gate CMOS logic family products ...
Description:
Advanced 74VHC High-Speed silicon-gate CMOS logic family products from ON Semiconductor offering high speed operation similar to equivalent Bipolar Schottky TTL, whilst maintaining the advantage of CMOS low power dissipation. Advanced high-speed low-power CMOS logicOperating Voltage Range: 2.0 to 5.5V7V ...
Advanced High-Speed (low-voltage) CMOS LogicOperating Voltage Range: 2.0 ...
Description:
Advanced High-Speed (low-voltage) CMOS LogicOperating Voltage Range: 2.0 to 3.6V5V tolerant inputs & outputs.
The HT82K628A is a keyboard encoder designed for ...
Description:
The HT82K628A is a keyboard encoder designed for IBM PC/AT, IBM PS/2 compatible machines. It accepts keyboard inputs and provides a 16-character first-in-first-out buffer in which data is stored.The HT82K629A can function both in USB and PS2 interface environment.
The 74HC74 and 74HCT74 are dual positive edge ...
Description:
The 74HC74 and 74HCT74 are dual positive edge triggered D-type flip-flop. They have individual data (nD), clock (nCP), set (nSD) and reset (nRD) inputs, and complementary nQ and nQ outputs. Data at the nD-input, that meets the set-up and hold ...