Bipolar Transistors

Bipolar Transistors are a solid state, three-pin devices made from three layers of silicon. A bipolar transistor 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

Bipolar transistors are constructed 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.

How do bipolar transistors work?

Bipolar transistors have 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.

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.

They are also available as;

  • Digital transistors - are made of a semiconductor material, usually silicon, which conducts the current (or electricity) with little resistance. They also tend to have at least three terminals for easy connection to an external circuit.
  • UJT transistors - constructed of a bar of lightly dope N type silicone with a small piece of heavily doped P type material attached to one side. Since the silicon bar is lightly dope it has very high resistance.

Applications of bipolar transistors?

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 Transistor Configuration Maximum Collector Base Voltage Maximum Emitter Base Voltage Maximum Operating Frequency Pin Count Number of Elements per Chip Dimensions Minimum Operating Temperature
RS-stocknr. 714-6746
FabrikantnummerBU508AW
2,30 €
Each (In a Pack of 2)
Aantal stuks
NPN 8 A 700 V TO-247 Through Hole 125 W Single - 9 V - 3 1 20.15 x 15.75 x 5.15mm -
RS-stocknr. 463-622
FabrikantnummerMJD45H11T4G
FabrikantON Semiconductor
0,434 €
Each (In a Pack of 20)
Aantal stuks
PNP 8 A 80 V DPAK (TO-252) Surface Mount 1.75 W Single - 5 V 90 MHz 3 1 2.38 x 6.73 x 6.22mm -
RS-stocknr. 545-0258
FabrikantnummerMJD45H11G
FabrikantON Semiconductor
0,51 €
Each
Aantal stuks
PNP 8 A 80 V DPAK (TO-252) Surface Mount 1.75 W Single - 5 V 90 MHz 3 1 2.38 x 6.73 x 6.22mm -
RS-stocknr. 486-4577
FabrikantnummerMJE350
0,49 €
Each (In a Pack of 5)
Aantal stuks
PNP 500 mA 300 V SOT-32 Through Hole 20.8 W Single 300 V 3 V - 3 1 10.8 x 7.8 x 2.7mm -
RS-stocknr. 168-6254
FabrikantnummerMJE350
0,409 €
Each (In a Tube of 50)
Aantal stuks
PNP 500 mA 300 V SOT-32 Through Hole 20.8 W Single 300 V 3 V - 3 1 10.8 x 7.8 x 2.7mm -
RS-stocknr. 922-7829
FabrikantnummerFZT853TA
FabrikantDiodesZetex
0,353 €
Each (On a Reel of 1000)
Aantal stuks
NPN 6 A 100 V SOT-223 Surface Mount 3 W Single 200 V 6 V 130 MHz 3 + Tab 1 1.65 x 6.55 x 3.55mm -
RS-stocknr. 464-158
FabrikantnummerMJE15033G
FabrikantON Semiconductor
1,266 €
Each (In a Pack of 5)
Aantal stuks
PNP 8 A 250 V TO-220AB Through Hole 50 W Single 250 V 5 V 30 MHz 3 1 9.28 x 10.28 x 4.82mm -
RS-stocknr. 169-8613
FabrikantnummerBC549BTA
FabrikantON Semiconductor
0,029 €
Each (On a Tape of 2000)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 5 V 1 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 303-1596
FabrikantnummerBC847BW,115
FabrikantNexperia
0,097 €
Each (In a Pack of 10)
Aantal stuks
NPN 100 mA 45 V UMT Surface Mount 200 mW Single 50 V 6 V 100 MHz 3 1 1 x 2.2 x 1.35mm -
RS-stocknr. 102-2278
FabrikantnummerMJL4302AG
FabrikantON Semiconductor
4,018 €
Each (In a Tube of 25)
Aantal stuks
PNP 15 A 350 V TO-3BPL Through Hole 230 W Single 350 V 5 V 35 MHz 3 1 26.4 x 20.3 x 5.3mm -
RS-stocknr. 484-5116
FabrikantnummerBCP52-16,115
FabrikantNexperia
0,241 €
Each (In a Pack of 25)
Aantal stuks
PNP 1 A 60 V SOT-223 Surface Mount 1 W Single 60 V 5 V 145 MHz 3 + Tab 1 1.7 x 6.7 x 3.7mm -
RS-stocknr. 922-7759
FabrikantnummerZTX450
FabrikantDiodesZetex
0,172 €
Each (In a Bag of 4000)
Aantal stuks
NPN 1 A 45 V E-Line Through Hole 1 W Single 60 V 5 V 150 MHz 3 1 4.01 x 4.77 x 2.41mm -
RS-stocknr. 169-8614
FabrikantnummerBC548CTA
FabrikantON Semiconductor
0,032 €
Each (On a Tape of 2000)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 5 V 1 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 464-237
FabrikantnummerMJL4302AG
FabrikantON Semiconductor
5,04 €
Each
Aantal stuks
PNP 15 A 350 V TO-3BPL Through Hole 230 W Single 350 V 5 V 35 MHz 3 1 26.4 x 20.3 x 5.3mm -
RS-stocknr. 714-0492
FabrikantnummerBD135-16
0,311 €
Each (In a Pack of 20)
Aantal stuks
NPN 3 A 45 V SOT-32 Through Hole 1.25 W Single 45 V 5 V - 3 1 10.8 x 7.8 x 2.7mm -
RS-stocknr. 166-3114
FabrikantnummerBC546BTF
FabrikantON Semiconductor
0,032 €
Each (On a Reel of 2000)
Aantal stuks
NPN 100 mA 65 V TO-92 Through Hole 500 mW Single 80 V 6 V 1 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 803-1106
FabrikantnummerBC548CTA
FabrikantON Semiconductor
0,058 €
Each (In a Pack of 200)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 5 V 1 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 170-4164
FabrikantnummerBC549C A1
0,029 €
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 30 V TO-92 Through Hole 500 mW Single 30 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -
RS-stocknr. 803-1077
FabrikantnummerBC546BTF
FabrikantON Semiconductor
0,058 €
Each (In a Pack of 200)
Aantal stuks
NPN 100 mA 65 V TO-92 Through Hole 500 mW Single 80 V 6 V 1 MHz 3 1 4.58 x 3.86 x 4.58mm -
RS-stocknr. 170-4155
FabrikantnummerBC546B A1
0,029 €
Each (On a Tape of 4000)
Aantal stuks
NPN 100 mA 65 V TO-92 Through Hole 500 mW Single 80 V 6 V - 3 1 5.1 x 4.1 x 4.7mm -