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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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庫存編號 445-2023
製造零件編號BC847CE6327HTSA1
BrandInfineon
HK$1.319
/個 (每包:50個)
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NPN 100 mA 45 V SOT-23 Surface Mount 330 mW 420 Single 50 V 6 V 250 MHz 3 1 -
RS庫存編號 145-9476
製造零件編號BCX5616H6327XTSA1
BrandInfineon
HK$0.79
個 (在毎卷:1000)
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NPN 1 A 80 V SOT-89 Surface Mount 2 W 100 Single 100 V 5 V 100 MHz 3 1 -
RS庫存編號 166-1081
製造零件編號BCR505E6327HTSA1
BrandInfineon
HK$0.299
個 (在毎卷:3000)
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NPN 500 mA 50 V SOT-23 Surface Mount - 70 Single - - - 3 - -
RS庫存編號 823-5529
製造零件編號BCX5616H6327XTSA1
BrandInfineon
HK$1.125
/個 (每包:50個)
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NPN 1 A 80 V SOT-89 Surface Mount 2 W 100 Single 100 V 5 V 100 MHz 3 1 -
RS庫存編號 445-2225
製造零件編號BFR93AE6327HTSA1
BrandInfineon
HK$1.667
/個 (每包:10個)
單位
NPN 90 mA 12 V SOT-23 Surface Mount 300 mW 70 Single 20 V 2 V 6000 MHz 3 1 -
RS庫存編號 445-2073
製造零件編號BCR505E6327HTSA1
BrandInfineon
HK$0.702
/個 (每包:25個)
單位
NPN 500 mA 50 V SOT-23 Surface Mount - 70 Single - - - 3 - -
RS庫存編號 911-4739
製造零件編號BCX5116H6327XTSA1
BrandInfineon
HK$0.774
個 (在毎卷:1000)
單位
PNP 1 A 45 V SOT-89 Surface Mount 2 W 25 Single 45 V 5 V 125 MHz 4 1 -
RS庫存編號 752-7896
製造零件編號BC807UE6327HTSA1
BrandInfineon
HK$0.744
/個 (每包:25個)
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PNP 500 mA 45 V SC-74 Surface Mount 330 mW 40 Isolated 50 V 5 V 200 MHz 6 2 -
RS庫存編號 170-2364
製造零件編號BFP840FESDH6327XTSA1
BrandInfineon
HK$3.259
/個 (每包:20個)
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NPN 35 mA 2 V, 2.25 V TSFP Surface Mount 75 mW 150 Single 2.6 V, 2.9 V - 85 GHz 4 1 AEC-Q101
RS庫存編號 892-2226
製造零件編號BFR181WH6327XTSA1
BrandInfineon
HK$1.493
/個 (每包:40個)
單位
NPN 20 mA 12 V SOT-323 (SC-70) Surface Mount 175 mW 70 Single 20 V 2 V 8 GHz 3 - -
RS庫存編號 752-7947
製造零件編號BC857BWH6327XTSA1
BrandInfineon
HK$0.352
/個 (每包:100個)
單位
PNP 100 mA 45 V SOT-323 (SC-70) Surface Mount 250 mW 220 Single 50 V 5 V 250 MHz 3 1 -
RS庫存編號 110-7421
製造零件編號BFP620FH7764XTSA1
BrandInfineon
HK$6.164
/個 (每包:15個)
單位
NPN 80 mA 7.5 V TSFP Surface Mount 185 mW 110 Single 7.5 V 1.2 V - 4 1 -
RS庫存編號 145-9624
製造零件編號BC857BWH6327XTSA1
BrandInfineon
HK$0.164
個 (在毎卷:3000)
單位
PNP 100 mA 45 V SOT-323 (SC-70) Surface Mount 250 mW 220 Single 50 V 5 V 250 MHz 3 1 -
RS庫存編號 110-7762
製造零件編號BCX70JE6327HTSA1
BrandInfineon
HK$0.376
/個 (每包:500個)
單位
NPN 100 mA 45 V SOT-23 Surface Mount 330 mW 20 Single 45 V 6 V - 3 1 -
RS庫存編號 911-4741
製造零件編號BCW68GE6327HTSA1
BrandInfineon
HK$0.216
個 (在毎卷:3000)
單位
PNP 800 mA 45 V SOT-23 Surface Mount 330 mW 630 Single 45 V 5 V 200 MHz 3 1 -
RS庫存編號 826-8992
製造零件編號BFP840ESDH6327XTSA1
BrandInfineon
HK$2.705
/個 (每包:50個)
單位
NPN 35 mA 2.25 V SOT-343 Surface Mount 75 mW 150 Single 2.9 V - 80 GHz 4 1 -
RS庫存編號 145-9719
製造零件編號BC846PNH6327XTSA1
BrandInfineon
HK$0.327
個 (在毎卷:3000)
單位
NPN + PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 250 mW 200 Isolated 80 V 6 V 250 MHz 6 2 -
RS庫存編號 165-7548
製造零件編號BC850BWH6327XTSA1
BrandInfineon
HK$0.17
個 (在毎卷:3000)
單位
NPN 100 mA 45 V SOT-323 (SC-70) Surface Mount 250 mW 200 Single 50 V 6 V 250 MHz 3 1 -
RS庫存編號 165-5849
製造零件編號BFP840ESDH6327XTSA1
BrandInfineon
HK$1.784
個 (在毎卷:3000)
單位
NPN 35 mA 2.25 V SOT-343 Surface Mount 75 mW 150 Single 2.9 V - 80 GHz 4 1 -
RS庫存編號 168-018
製造零件編號BFP520H6327XTSA1
BrandInfineon
HK$3.393
/個 (每包:10個)
單位
NPN 40 mA 2.5 V SOT-343 Surface Mount 100 mW 70 Single 10 V 1 V 6 GHz 4 1 -