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 171-5383
製造零件編號DTA013ZEBTL
BrandROHM
HK$0.167
個 (在毎卷:3000)
單位
PNP 100 mA - SOT-416FL Surface Mount 150 mW 30 Single - - 250 MHz 3 1 -
RS庫存編號 663-8531
製造零件編號2SC3392-6-TB-E
BrandSanyo
HK$2.83
/個 (每包:5個)
單位
NPN 500 mA 50 V CP Surface Mount 200 mW 200 - 60 V 5 V 300 MHz 3 1 -
RS庫存編號 790-5331
製造零件編號MJD3055G
HK$4.377
/個 (每包:15個)
單位
NPN 10 A 60 V DPAK Surface Mount 20 W 5 Single 70 V dc 5 V 500 kHz 3 1 -
RS庫存編號 711-4888
製造零件編號BC857CT-7-F
HK$0.669
/個 (每包:50個)
單位
PNP 100 mA 45 V SOT-523 (SC-89) Surface Mount 150 mW 420 Single -50 V -5 V - 3 1 -
RS庫存編號 711-4926
製造零件編號BC857BS-7-F
HK$1.234
/個 (每包:50個)
單位
PNP 100 mA 45 V SOT-363 (SC-88) Surface Mount 200 mW 220 Isolated -50 V -5 V - 6 2 -
RS庫存編號 800-9285
製造零件編號2SB1124S-TD-E
HK$3.671
/個 (每包:25個)
單位
PNP 3 A 50 V PCP Surface Mount 1.5 W 100 Single -60 V -6 V 150 MHz 3 1 -
RS庫存編號 165-9924
製造零件編號PXT4401,115
BrandNexperia
HK$1.772
個 (在毎卷:1000)
單位
NPN 600 mA 40 V SOT-89 Surface Mount 1.1 W 20 Single 60 V 5 V 100 MHz 3 1 -
RS庫存編號 751-3597
製造零件編號BCX5610TA
HK$1.315
Each (On a Tape of 50)
單位
NPN 1 A 80 V SOT-89 Surface Mount 1 W 63 Single 100 V 5 V 150 MHz 3 1 -
RS庫存編號 485-9137
製造零件編號D44H8
HK$6.354
/個 (每包:5個)
單位
NPN 20 A 60 V TO-220 Through Hole 50 W 40 Single 60 V 5 V - 3 1 -
RS庫存編號 921-5428
製造零件編號HFA3127BZ
HK$76.60
單位
NPN 65 mA 8 V SOIC Surface Mount 150 mW 40 Isolated 12 V 5.5 V 8000 MHz 16 5 -
RS庫存編號 166-1960
製造零件編號FFB2907A
HK$0.574
個 (在毎卷:3000)
單位
PNP 600 mA 60 V SOT-363 (SC-70) Surface Mount 300 mW 300 Isolated 60 V 5 V 100 MHz 6 2 -
RS庫存編號 877-2671
製造零件編號HD1750FX
HK$28.984
/個 (每包:5個)
單位
NPN 24 A 800 V ISOWATT218FX Through Hole 75 W 6.5 @ 12 A @ 5 V Single - 10 V - 3 1 -
RS庫存編號 711-5023
製造零件編號ZXTN19055DZTA
HK$3.916
/個 (每包:10個)
單位
NPN 6 A 55 V SOT-89 Surface Mount 2.1 W 30 Single 150 V 7 V 200 MHz 3 1 -
RS庫存編號 169-0705
製造零件編號MMST3904-7-F
HK$0.391
個 (在毎卷:3000)
單位
NPN 200 mA 40 V SOT-323 (SC-70) Surface Mount 200 mW 30 Single 60 V 6 V 300 MHz 3 1 -
RS庫存編號 177-7982
製造零件編號2SB1197KT146Q/R
BrandROHM
HK$0.635
個 (在毎卷:3000)
單位
PNP 800 mA 32 V SOT-346 (SC-59) Surface Mount 200 mW 120 Single -40 V -5 V 200 MHz 3 1 -
RS庫存編號 168-6431
製造零件編號MJD3055T4
HK$3.181
個 (在毎卷:2500)
單位
NPN 10 A 60 V DPAK (TO-252) Surface Mount 20 W 5 Single 70 V 5 V 2 MHz 3 1 -
RS庫存編號 807-5096
製造零件編號BCP53
HK$2.07
Each (On a Tape of 50)
單位
PNP 1.2 A 80 V SOT-223 Surface Mount 1.5 W 150 Single -100 V -5 V - 3 + Tab 1 -
RS庫存編號 166-2058
製造零件編號FSB749
HK$0.878
個 (在毎卷:3000)
單位
PNP 3 A 25 V SOT-23 Surface Mount 500 mW 15 Single -35 V -5 V 100 MHz 3 1 -
RS庫存編號 790-5479
製造零件編號NSS1C201MZ4T1G
HK$4.162
/個 (每包:10個)
單位
NPN 2 A 100 V SOT-223 Surface Mount 2 W 40 Single 140 V dc 7 V 1 MHz 3 + Tab 1 -
RS庫存編號 751-4512
製造零件編號MMBT5401-7-F
HK$0.387
/個 (每包:250個)
單位
PNP 600 mA 150 V SOT-23 Surface Mount 300 mW 50 Single -160 V -5 V 300 MHz 3 1 -