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 922-7803
製造零件編號FZT951TA
TWD15.70
個 (在毎卷:1000)
單位
PNP 5 A 60 V SOT-223 Surface Mount 3 W 10 Single 100 V 6 V 120 MHz 3 + Tab 1 -
RS庫存編號 806-4447
製造零件編號KSA992FBU
TWD2.20
/個 (每包:200個)
單位
PNP 50 mA 120 V TO-92 Through Hole 500 mW 150 Single -120 V -5 V 1 MHz 3 1 -
RS庫存編號 774-3587
製造零件編號MPS8099G
TWD7.90
/個 (每包:10個)
單位
NPN 500 mA 80 V TO-92 Through Hole 1.5 W 75 Single 80 V 6 V 100 MHz 3 1 -
RS庫存編號 739-0335
製造零件編號SS8050DTA
TWD6.50
/個 (每包:10個)
單位
NPN 1.5 A 25 V TO-92 Through Hole 1 W 40 Single 40 V 6 V - 3 1 -
RS庫存編號 781-5222
製造零件編號SMMBT2222ALT1G
TWD2.40
/個 (每包:100個)
單位
NPN 600 mA 40 V SOT-23 Surface Mount 225 mW 40 Single 75 V dc 6 V 100 MHz 3 1 AEC-Q101
RS庫存編號 445-2023
製造零件編號BC847CE6327HTSA1
BrandInfineon
TWD5.70
/個 (每包:50個)
單位
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 163-1996
製造零件編號2SB1124T-TD-E
TWD8.40
個 (在毎卷:1000)
單位
PNP 3 A 50 V PCP Surface Mount 1.5 W 35 Single -60 V -6 V 150 MHz 3 1 -
RS庫存編號 739-0307
製造零件編號SS8050DBU
TWD7.20
/個 (每包:10個)
單位
NPN 1.5 A 25 V TO-92 Through Hole 1 W 40 Single 40 V 6 V - 3 1 -
RS庫存編號 711-4878
製造零件編號MMBT3906-7-F
TWD1.40
/個 (每包:100個)
單位
PNP 200 mA 40 V SOT-23 Surface Mount 300 mW 30 Single -40 V -5 V - 3 1 -
RS庫存編號 145-4375
製造零件編號KSD1691GSTU
TWD19.30
毎管:60 個
單位
NPN 5 A 60 V TO-126 Through Hole 20 W 50 Single 60 V 7 V - 3 1 -
RS庫存編號 806-4541
製造零件編號KSD1691GSTU
TWD19.30
/個 (每包:20個)
單位
NPN 5 A 60 V TO-126 Through Hole 20 W 50 Single 60 V 7 V - 3 1 -
RS庫存編號 756-0284
製造零件編號2SC5712(TE12L,F)
BrandToshiba
TWD9.80
/個 (每包:10個)
單位
NPN 3 A 50 V SC-62 Surface Mount 2.5 W 200 Single 100 V 7 V - 3 1 -
RS庫存編號 803-1125
製造零件編號BC550CTA
TWD2.20
/個 (每包:200個)
單位
NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 5 V 1 MHz 3 1 -
RS庫存編號 155-024
製造零件編號ZXTP2029FTA
TWD22.70
/個 (每包:10個)
單位
PNP 3 A 100 V SOT-23 Surface Mount 1.56 W 40 Single 130 V 7 V 150 MHz 3 1 -
RS庫存編號 485-9812
製造零件編號TIP41C
TWD22.40
/個 (每包:5個)
單位
NPN 6 A 100 V TO-220 Through Hole 65 W 15 Single 100 V 5 V - 3 1 -
RS庫存編號 445-2146
製造零件編號BDP949
BrandInfineon
TWD22.40
/個 (每包:5個)
單位
NPN 3 A 60 V SOT-223 Surface Mount 5 W 25 Single 60 V 5 V 100 MHz 3 + Tab 1 -
RS庫存編號 178-7043
製造零件編號BCX55-16,115
BrandNexperia
TWD3.00
個 (在毎卷:1000)
單位
NPN 1 A 60 V UPAK Surface Mount 1.25 W 100 Single 60 V 5 V 180 MHz 4 1 -
RS庫存編號 911-4713
製造零件編號BDP949
BrandInfineon
TWD9.10
個 (在毎卷:1000)
單位
NPN 3 A 60 V SOT-223 Surface Mount 5 W 50 Single 60 V 5 V 100 MHz 4 1 -
RS庫存編號 484-5188
製造零件編號BCX55-16,115
BrandNexperia
TWD9.20
/個 (每包:25個)
單位
NPN 1 A 60 V UPAK Surface Mount 1.25 W 100 Single 60 V 5 V 180 MHz 4 1 -
RS庫存編號 168-6173
製造零件編號TIP50
TWD23.00
毎管:50 個
單位
NPN 1 A 400 V TO-220 Through Hole 2 W 10 Single 500 V 5 V 10 MHz 3 1 -