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 Maximum Base Emitter Saturation Voltage
RS庫存編號 168-3582
製造零件編號DMC202010R
BrandPanasonic
HK$1.058
個 (在毎卷:3000)
單位
NPN 100 mA 50 V Mini5 G3 B Surface Mount 300 mW Common Base 60 V 7 V 150 MHz 5 2 2.9 x 1.5 x 1.1mm -
RS庫存編號 168-3450
製造零件編號DRC3143Z0L
BrandPanasonic
HK$0.587
個 (在毎卷:10000)
單位
NPN - 50 V SSSMini3 F2 B Surface Mount 100 mW Single - - - 3 1 1.2 x 0.8 x 0.47mm -
RS庫存編號 715-9702
製造零件編號DMC201A00R
BrandPanasonic
HK$4.655
/個 (每包:10個)
單位
NPN 500 mA 20 V Mini5 G3 B Surface Mount 300 mW Common Emitter 25 V 12 V 150 MHz 5 2 2.9 x 1.5 x 1.1mm -
RS庫存編號 168-3503
製造零件編號DRC2143T0L
BrandPanasonic
HK$1.134
個 (在毎卷:3000)
單位
NPN - 50 V Mini3 G3 B Surface Mount 200 mW Single - - - 3 1 2.9 x 1.5 x 1.1mm -
RS庫存編號 698-0407
製造零件編號DSC200100L
BrandPanasonic
HK$0.679
/個 (每包:100個)
單位
NPN 100 mA 50 V Mini3 G3 B Surface Mount 200 mW Single 60 V 7 V 150 MHz 3 1 2.9 x 1.5 x 1.1mm -
RS庫存編號 698-0362
製造零件編號DRC5114E0L
BrandPanasonic
HK$2.43
/個 (每包:50個)
單位
NPN - 50 V SMini3 F2 B Surface Mount - Single - 6 V - 3 1 0.9 x 2mm -
RS庫存編號 168-3380
製造零件編號DSC300100L
BrandPanasonic
HK$2.621
個 (在毎卷:10000)
單位
NPN 100 mA 50 V SSSMini3 F2 B Surface Mount 100 mW Single 60 V 7 V 150 MHz 3 1 1.2 x 0.8 x 0.47mm -
RS庫存編號 760-3088
製造零件編號DMC5610L0R
BrandPanasonic
HK$1.093
Each (On a Tape of 25)
單位
NPN - 50 V SMini5 F3 B Surface Mount 150 mW Common Emitter - 50 V - 5 2 2 x 1.25 x 0.6mm -
RS庫存編號 168-3657
製造零件編號DSC7Q01Q0L
BrandPanasonic
HK$3.717
個 (在毎卷:1000)
單位
NPN 1 A 80 V MiniP3 F2 B Surface Mount 1 W Single 100 V 5 V - 3 2 4.5 x 2.5 x 1.5mm -
RS庫存編號 749-8205
製造零件編號DSC2G0300L
BrandPanasonic
HK$2.367
/個 (每包:20個)
單位
NPN 50 mA 20 V Mini3 G3 B Surface Mount 200 mW Single 30 V 3 V 1600 MHz 3 1 2.9 x 1.5 x 1.1mm -
RS庫存編號 711-5770
製造零件編號DSC7Q01Q0L
BrandPanasonic
HK$6.421
/個 (每包:10個)
單位
NPN 1 A 80 V MiniP3 F2 B Surface Mount 1 W Single 100 V 5 V - 3 2 4.5 x 2.5 x 1.5mm -
RS庫存編號 707-4301
製造零件編號DSC7003S0L
BrandPanasonic
HK$3.76
/個 (每包:10個)
單位
NPN 1 A 50 V MiniP3 F2 B Surface Mount 1 W Single 60 V 5 V 170 MHz 3 1 4.5 x 2.5 x 1.5mm -
RS庫存編號 168-3357
製造零件編號DRC5114E0L
BrandPanasonic
HK$0.593
個 (在毎卷:3000)
單位
NPN - 50 V SMini3 F2 B Surface Mount - Single - 6 V - 3 1 0.9 x 2mm -
RS庫存編號 710-5941
製造零件編號DMC202010R
BrandPanasonic
HK$2.506
/個 (每包:20個)
單位
NPN 100 mA 50 V Mini5 G3 B Surface Mount 300 mW Common Base 60 V 7 V 150 MHz 5 2 2.9 x 1.5 x 1.1mm -
RS庫存編號 168-3721
製造零件編號DMC201A00R
BrandPanasonic
HK$2.054
個 (在毎卷:3000)
單位
NPN 500 mA 20 V Mini5 G3 B Surface Mount 300 mW Common Emitter 25 V 12 V 150 MHz 5 2 2.9 x 1.5 x 1.1mm -
RS庫存編號 168-3616
製造零件編號DRA2543E0L
BrandPanasonic
HK$3.515
個 (在毎卷:3000)
單位
PNP - 50 V Mini3 G3 B Surface Mount 200 mW Single - - - 3 1 2.9 x 1.5 x 1.1mm -
RS庫存編號 168-3475
製造零件編號DSA900100L
BrandPanasonic
HK$0.67
個 (在毎卷:3000)
單位
PNP 100 mA 50 V SSMini3 F3 B Surface Mount 125 mW Single -60 V -7 V 150 MHz 3 1 1.6 x 0.85 x 0.6mm -
RS庫存編號 168-3653
製造零件編號DSC7101S0L
BrandPanasonic
HK$1.957
個 (在毎卷:1000)
單位
NPN 500 mA 80 V MiniP3 F2 B Surface Mount 1 W Single 80 V 5 V 150 MHz 3 1 4.5 x 2.5 x 1.5mm -
RS庫存編號 168-3708
製造零件編號DMA961040R
BrandPanasonic
HK$1.015
個 (在毎卷:8000)
單位
PNP - 50 V SSMini5 F4 B Surface Mount 125 mW Common Emitter - - - 5 2 1.6 x 1.2 x 0.5mm -
RS庫存編號 698-7105
製造零件編號DSC300100L
BrandPanasonic
HK$2.621
/個 (每包:50個)
單位
NPN 100 mA 50 V SSSMini3 F2 B Surface Mount 100 mW Single 60 V 7 V 150 MHz 3 1 1.2 x 0.8 x 0.47mm -