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$1.08
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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 823-5529
製造零件編號BCX5616H6327XTSA1
BrandInfineon
HK$1.128
/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 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 445-2073
製造零件編號BCR505E6327HTSA1
BrandInfineon
HK$0.685
/個 (每包:25個)
單位
NPN 500 mA 50 V SOT-23 Surface Mount - 70 Single - - - 3 - -
RS庫存編號 445-2225
製造零件編號BFR93AE6327HTSA1
BrandInfineon
HK$1.667
/個 (每包:10個)
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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 145-8844
製造零件編號BFP740ESDH6327XTSA1
BrandInfineon
HK$1.711
個 (在毎卷:3000)
單位
NPN 45 mA 4.9 V SOT-343 Surface Mount 160 mW 160 Single 3 V 0.5 V 45 GHz 4 1 -
RS庫存編號 752-7931
製造零件編號BC850BWH6327XTSA1
BrandInfineon
HK$0.389
/個 (每包:100個)
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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 110-9096
製造零件編號BDP950H6327XTSA1
BrandInfineon
HK$3.426
/個 (每包:40個)
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PNP 3 A 60 V SOT-223 Surface Mount 5 W 15 Single 60 V 5 V - 3 + Tab 1 -
RS庫存編號 857-8135
製造零件編號BC817K25WH6433XTMA1
BrandInfineon
HK$0.219
個 (在毎卷:10000)
單位
NPN 500 mA 45 V SOT-323 (SC-70) Surface Mount 500 mW 40 Single 50 V 5 V 170 MHz 3 1 -
RS庫存編號 826-9866
製造零件編號BC849CE6327HTSA1
BrandInfineon
HK$0.265
個 (在毎卷:1500)
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NPN 100 mA 30 V SOT-23 Surface Mount 330 mW 420 Single 30 V 6 V 250 MHz 3 1 -
RS庫存編號 145-8845
製造零件編號BFP640ESDH6327XTSA1
BrandInfineon
HK$1.891
個 (在毎卷:3000)
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NPN 50 mA 4.1 V SOT-343 Surface Mount 200 mW 110 Single 4.8 V 0.5 V 45 GHz 4 1 -
RS庫存編號 753-2778
製造零件編號BCW68GE6327HTSA1
BrandInfineon
HK$0.365
/個 (每包:100個)
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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 145-8907
製造零件編號BCV62BE6327HTSA1
BrandInfineon
HK$0.553
個 (在毎卷:3000)
單位
PNP 100 mA 30 V SOT-143 Surface Mount 300 mW 100 Current Mirror 30 V 6 V 250 MHz 4 2 -
RS庫存編號 165-5734
製造零件編號BFR380L3E6327XTMA1
BrandInfineon
HK$0.796
個 (在毎卷:15000)
單位
NPN 80 mA 6 V TSLP Surface Mount 380 mW 90 Single 15 V 2 V 14 GHz 3 1 -
RS庫存編號 145-8793
製造零件編號BC848CWH6327XTSA1
BrandInfineon
HK$0.164
個 (在毎卷:3000)
單位
NPN 100 mA 30 V SOT-323 (SC-70) Surface Mount 250 mW 420 Single 30 V 6 V 250 MHz 3 1 -
RS庫存編號 110-7146
製造零件編號BC857BE6433HTMA1
BrandInfineon
HK$0.356
/個 (每包:500個)
單位
PNP 100 mA 45 V SOT-23 Surface Mount 330 mW 125 Single 50 V 5 V - 3 1 -
RS庫存編號 168-018
製造零件編號BFP520H6327XTSA1
BrandInfineon
HK$3.393
/個 (每包:10個)
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NPN 40 mA 2.5 V SOT-343 Surface Mount 100 mW 70 Single 10 V 1 V 6 GHz 4 1 -
RS庫存編號 145-8840
製造零件編號BFP640H6327XTSA1
BrandInfineon
HK$1.723
個 (在毎卷:3000)
單位
NPN 50 mA 4 V SOT-343 Surface Mount 200 mW 110 Single 13 V 1.2 V 40 GHz 4 1 -
RS庫存編號 166-1107
製造零件編號BFP183WH6327XTSA1
BrandInfineon
HK$0.991
個 (在毎卷:3000)
單位
NPN 65 mA 12 V SOT-343 Surface Mount 450 mW 70 Single 20 V 2 V 8000 MHz 4 1 -