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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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 Minimum Operating Temperature
RS庫存編號 178-7046
製造零件編號BST39TA
BrandNexperia
TWD4.60
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NPN 500 mA 350 V SOT-89 Surface Mount 1 W Single 400 V 5 V 70 MHz 3 1 1.5 x 4.5 x 2.5mm -
RS庫存編號 669-7720
製造零件編號BST39TA
BrandNexperia
TWD12.40
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NPN 500 mA 350 V SOT-89 Surface Mount 1 W Single 400 V 5 V 70 MHz 3 1 1.5 x 4.5 x 2.5mm -65 °C
RS庫存編號 484-2577
製造零件編號BSP19,115
BrandNexperia
TWD17.80
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NPN 100 mA 350 V SOT-223 (SC-73) Surface Mount 1.2 W Single 400 V 5 V 70 MHz 4 1 1.7 x 6.7 x 3.7mm -65 °C
RS庫存編號 166-1534
製造零件編號BSP19,115
BrandNexperia
TWD6.60
個 (在毎卷:1000)
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NPN 100 mA 350 V SOT-223 (SC-73) Surface Mount 1.2 W Single 400 V 5 V 70 MHz 4 1 1.7 x 6.7 x 3.7mm -
RS庫存編號 179-1033
製造零件編號PDTC143ZU,115
BrandNexperia
TWD0.80
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NPN - 50 V UMT Surface Mount - Single - 10 V - 3 1 2.2 x 1.35 x 1mm -
RS庫存編號 518-3122
製造零件編號PDTC143ZU,115
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TWD5.00
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NPN - 50 V UMT Surface Mount - Single - 10 V - 3 1 2.2 x 1.35 x 1mm -65 °C
RS庫存編號 178-7043
製造零件編號BCX55-16,115
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TWD2.80
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NPN 1 A 60 V UPAK Surface Mount 1.25 W Single 60 V 5 V 180 MHz 4 1 1.6 x 4.6 x 2.6mm -
RS庫存編號 484-5188
製造零件編號BCX55-16,115
BrandNexperia
TWD9.90
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NPN 1 A 60 V UPAK Surface Mount 1.25 W Single 60 V 5 V 180 MHz 4 1 1.6 x 4.6 x 2.6mm -65 °C
RS庫存編號 179-1079
製造零件編號MMBT3904,215
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TWD0.60
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- - - - - - - - - - - - - -
RS庫存編號 103-7553
製造零件編號BC847BPN,115
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TWD1.10
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NPN + PNP 100 mA 45 V UMT Surface Mount 200 mW Isolated 50 V 5 V 100 MHz 6 2 1 x 2.2 x 1.35mm -
RS庫存編號 792-0816
製造零件編號BC846BS,115
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TWD3.40
個 (在毎卷:100)
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NPN 100 mA 65 V SOT-363 (SC-88) Surface Mount 200 mW Isolated 80 V 6 V - 6 2 2.2 x 1.35 x 1.1mm -55 °C
RS庫存編號 166-0020
製造零件編號BC846BS,115
BrandNexperia
TWD1.10
個 (在毎卷:3000)
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NPN 100 mA 65 V SOT-363 (SC-88) Surface Mount 200 mW Isolated 80 V 6 V - 6 2 2.2 x 1.35 x 1.1mm -
RS庫存編號 518-1643
製造零件編號PBSS4330X,115
BrandNexperia
TWD10.30
/個 (每包:10個)
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NPN 3 A 30 V UPAK Surface Mount 1.6 W Single 50 V 6 V 100 MHz 4 1 1.6 x 4.6 x 2.6mm -65 °C
RS庫存編號 170-8005
製造零件編號BC847BPN,135
BrandNexperia
TWD0.90
個 (在毎卷:10000)
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NPN + PNP 100 mA 45 V SOT-363 Surface Mount 400 mW Current Mirror 50 V 5 V - 6 2 2.2 x 1.35 x 1mm -
RS庫存編號 103-5679
製造零件編號BCX53-16,115
BrandNexperia
TWD2.80
個 (在毎卷:1000)
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PNP 1 A 80 V UPAK Surface Mount 1.3 W Single 100 V 5 V 145 MHz 4 1 1.6 x 4.6 x 2.6mm -
RS庫存編號 436-8013
製造零件編號BCX53-16,115
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TWD8.70
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PNP 1 A 80 V UPAK Surface Mount 1.3 W Single 100 V 5 V 145 MHz 4 1 1.6 x 4.6 x 2.6mm -65 °C
RS庫存編號 725-8616
製造零件編號MMBT3904,215
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TWD2.90
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NPN 200 mA 40 V SOT-23 (TO-236AB) Surface Mount 250 mW Single 60 V 6 V - 3 1 1 x 3 x 1.4mm -65 °C
RS庫存編號 484-5532
製造零件編號BC847BPN,115
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TWD7.40
/個 (每包:50個)
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NPN + PNP 100 mA 45 V UMT Surface Mount 200 mW Isolated 50 V 5 V 100 MHz 6 2 1 x 2.2 x 1.35mm -65 °C
RS庫存編號 166-0478
製造零件編號PBSS4330X,115
BrandNexperia
TWD3.70
個 (在毎卷:1000)
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NPN 3 A 30 V UPAK Surface Mount 1.6 W Single 50 V 6 V 100 MHz 4 1 1.6 x 4.6 x 2.6mm -
RS庫存編號 179-1081
製造零件編號MMBT3906,215
BrandNexperia
TWD0.70
個 (在毎卷:3000)
單位
PNP 200 mA 40 V SOT-23 (TO-236AB) Surface Mount 250 mW Single 40 V 6 V - 3 1 1 x 3 x 1.4mm -