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).

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Omschrijving Prijs 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-stocknr. 121-9948
FabrikantnummerZTX451
FabrikantDiodesZetex
€ 0,226
Each (In a Bag of 4000)
Aantal stuks
NPN 1 A 60 V E-Line Through Hole 1 W 10 Single 80 V 5 V 150 MHz 3 1 -
RS-stocknr. 896-2625
Fabrikantnummer2SC2712-Y,LF(T
FabrikantToshiba
€ 0,066
Each (In a Pack of 50)
Aantal stuks
NPN 150 mA 50 V TO-236MOD Surface Mount 150 mW 70 Single 60 V 5 V 80 MHz 3 1 -
RS-stocknr. 170-3431
FabrikantnummerBC847BLT3G
FabrikantON Semiconductor
€ 0,011
Each (On a Reel of 10000)
Aantal stuks
NPN 100 mA 45 V SOT-23 Surface Mount 300 mW 200 Single 50 V 6 V 100 MHz 3 1 -
RS-stocknr. 826-9367
FabrikantnummerBFP182WH6327XTSA1
FabrikantInfineon
€ 0,108
Each (In a Pack of 100)
Aantal stuks
NPN 35 mA 12 V SOT-343 Surface Mount 250 mW 70 Single 20 V 2 V 8 GHz 4 1 -
RS-stocknr. 823-1435
FabrikantnummerLMN200B02-7
FabrikantDiodesZetex
€ 0,291
Each (In a Pack of 25)
Aantal stuks
NPN + PNP 200 mA 50 V SOT-363 (SC-88) Surface Mount 200 mW 250 N+P Loadswitch -50 V -5 V 200 MHz 6 2 -
RS-stocknr. 170-4159
FabrikantnummerBC547A A1
€ 0,032
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V - 3 1 -
RS-stocknr. 145-4153
Fabrikantnummer2SD1623S-TD-E
FabrikantON Semiconductor
€ 0,183
Each (On a Reel of 1000)
Aantal stuks
NPN 2 A 50 V PCP Surface Mount 1.3 W 40 Single 60 V 6 V 150 MHz 3 1 -
RS-stocknr. 103-1578
FabrikantnummerBU508AW
€ 1,994
Each (In a Tube of 30)
Aantal stuks
NPN 8 A 700 V TO-247 Through Hole 125 W 5 Single - 9 V - 3 1 -
RS-stocknr. 792-0807
FabrikantnummerBC846BPN,115
FabrikantNexperia
€ 0,086
Each (On a Reel of 100)
Aantal stuks
NPN + PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 300 mW 200 Isolated -80 V, 80 V -6 (PNP) V, 6 (NPN) V - 6 2 -
RS-stocknr. 146-0856
FabrikantnummerBC807,215
FabrikantNexperia
€ 0,022
Each (On a Reel of 3000)
Aantal stuks
PNP 500 mA 45 V SOT-23 Surface Mount 250 mW 100 Single -50 V -5 V - 3 1 -
RS-stocknr. 807-4863
FabrikantnummerMMPQ3904
FabrikantON Semiconductor
€ 1,156
Each (In a Pack of 5)
Aantal stuks
NPN 200 mA 40 V SOIC Surface Mount 1 W 75 Isolated 60 V 6 V 250 MHz 16 4 -
RS-stocknr. 169-8617
FabrikantnummerBC550CTA
FabrikantON Semiconductor
€ 0,032
Each (On a Tape of 2000)
Aantal stuks
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 5 V 1 MHz 3 1 -
RS-stocknr. 625-5082
FabrikantnummerMJD32CG
FabrikantON Semiconductor
€ 2,20
Each
Aantal stuks
PNP 3 A 100 V DPAK (TO-252) Surface Mount 1.56 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS-stocknr. 121-9934
FabrikantnummerFMMT458TA
FabrikantDiodesZetex
€ 0,106
Each (On a Reel of 3000)
Aantal stuks
NPN 225 mA 400 V SOT-23 Surface Mount 500 mW 15 Single 400 V 5 V 50 MHz 3 1 -
RS-stocknr. 178-7163
FabrikantnummerBC857,215
FabrikantNexperia
€ 0,022
Each (On a Reel of 3000)
Aantal stuks
PNP 100 mA 45 V SOT-23 (TO-236AB) Surface Mount 250 mW 125 Single 50 V 5 V 100 MHz 3 1 -
RS-stocknr. 792-0790
FabrikantnummerBC807,215
FabrikantNexperia
€ 0,042
Each (On a Reel of 200)
Aantal stuks
PNP 500 mA 45 V SOT-23 Surface Mount 250 mW 100 Single -50 V -5 V - 3 1 -
RS-stocknr. 168-6780
FabrikantnummerBD135
€ 0,345
Each (In a Tube of 50)
Aantal stuks
NPN 3 A 45 V SOT-32 Through Hole 1.25 W 25 Single 45 V 5 V - 3 1 -
RS-stocknr. 485-6914
FabrikantnummerBUL138
€ 1,19
Each (In a Pack of 5)
Aantal stuks
NPN 5 A 400 V TO-220 Through Hole 80 W 8 Single 800 V 9 V - 3 1 -
RS-stocknr. 294-227
FabrikantnummerMJE340
FabrikantMagnatec
€ 2,20
Each
Aantal stuks
NPN 500 mA 300 V SOT-32 Through Hole 2.8 W 30 Single 300 V 3 V - 3 1 -
RS-stocknr. 738-7584
Fabrikantnummer2N2907ACSM
FabrikantSemelab
€ 16,58
Each
Aantal stuks
PNP 600 mA 60 V LCC 1 Surface Mount 500 mW 75 Single -60 V -5 V - 3 1 -
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