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 184-868
製造零件編號2SC5198-O(Q)
BrandToshiba
HK$21.19
單位
NPN 10 A 140 V TO-3PN Through Hole 100 W 80 Single 140 V 5 V 30 MHz 3 1 -
RS庫存編號 756-0293
製造零件編號2SC5886A(T6L1,NQ)
BrandToshiba
HK$5.026
/個 (每包:5個)
單位
NPN 5 A 50 V DPAK (TO-252) Surface Mount 20 W 200 Single 120 V 9 V - 3 1 -
RS庫存編號 601-1113
製造零件編號2SA1048-GR(F)
BrandToshiba
HK$1.04
/個 (每包:10個)
單位
PNP 150 mA 50 V E-Line Surface Mount 200 mW 200 - 50 V 5 V 80 MHz 3 1 -
RS庫存編號 890-2682
製造零件編號2SC5200-O(S1,F,S)
BrandToshiba
HK$15.502
/個 (每包:5個)
單位
NPN 15 A 230 V TO-3PL Through Hole 150 W 35 Single 230 V 5 V - 3 1 -
RS庫存編號 799-4817
製造零件編號2SC5200-O(S1,F,S)
BrandToshiba
HK$15.886
/個 (每包:5個)
單位
NPN 15 A 230 V TO-3PL Through Hole 150 W 35 Single 230 V 5 V 30 MHz 3 1 -
RS庫存編號 890-2604
製造零件編號2SA1312-BL(TE85L,F
BrandToshiba
HK$1.758
/個 (每包:25個)
單位
PNP 100 mA 120 V SOT-346 (SC-59) Surface Mount 150 mW 200 Single -120 V -5 V - 3 1 -
RS庫存編號 601-1315
製造零件編號2SA950-O(F)
BrandToshiba
HK$2.33
/個 (每包:10個)
單位
PNP 800 mA 30 V TO-92 Through Hole 600 mW 100 - 35 V 5 V 120 MHz 3 1 -
RS庫存編號 601-1810
製造零件編號2SD1947A(F)
BrandToshiba
HK$25.30
/個 (每包:5個)
單位
NPN 10 A 100 V TO-220 Through Hole 2 W 150 - 100 V 7 V 70 MHz 3 1 -
RS庫存編號 890-2614
製造零件編號2SA1587-GR(TE85L,F
BrandToshiba
HK$2.013
/個 (每包:25個)
單位
PNP 100 mA 120 V SOT-323 (SC-70) Surface Mount 100 mW 200 Single -120 V -5 V - 3 1 -
RS庫存編號 601-1084
製造零件編號2SA1015-Y(TPE2,F)
BrandToshiba
HK$2,820.00
毎卷:3000 個
Reel(s)
PNP 150 mA 50 V TO-92 Through Hole 400 mW 120 - 50 V 5 V 80 MHz 3 1 -
RS庫存編號 890-2654
製造零件編號2SC4117-BL(TE85L,F
BrandToshiba
HK$4.031
/個 (每包:25個)
單位
NPN 100 mA 120 V SOT-323 (SC-70) Surface Mount 100 mW 200 Single 120 V 5 V - 3 1 -
RS庫存編號 531-9450
製造零件編號2SC3421-Y(Q)
BrandToshiba
HK$4.82
/個 (每包:10個)
單位
NPN 1 A 120 V TO-126IS Through Hole 1.5 W 120 - 120 V 5 V 120 MHz 3 1 -
RS庫存編號 601-6405
製造零件編號2SC5171(Q)
BrandToshiba
HK$5.30
/個 (每包:5個)
單位
NPN 2 A 180 V TO-220 Through Hole 20 W 50 - 180 V 5 V 200 MHz 3 1 -
RS庫存編號 601-1719
製造零件編號2SC5359-O(Q)
BrandToshiba
HK$30.104
/個 (每包:5個)
單位
NPN 15 A 230 V TO-3PL Through Hole 180 W 80 Single 230 V 5 V 30 MHz 3 1 -
RS庫存編號 540-6324
製造零件編號2SC732TM(F)
BrandToshiba
HK$2.84
/個 (每包:5個)
單位
NPN 150 mA 50 V TO-92 Through Hole 400 mW 200 - 60 V 5 V 150 MHz 3 1 -
RS庫存編號 890-2620
製造零件編號2SA1943N(S1,E,S)
BrandToshiba
HK$16.066
/個 (每包:5個)
單位
PNP 15 A 230 V TO-3P Through Hole 150 W 35 Single -230 V -5 V - 3 1 -
RS庫存編號 756-0603
製造零件編號HN1C07F(TE85L,F)
BrandToshiba
HK$1.983
/個 (每包:10個)
單位
NPN 500 mA 50 V SM Surface Mount 300 mW 25 Isolated 50 V 5 V 300 MHz 6 2 -
RS庫存編號 890-2617
製造零件編號2SA1362-GR,LF(T
BrandToshiba
HK$3.951
/個 (每包:25個)
單位
PNP 800 mA 15 V SOT-346 (SC-59) Surface Mount 200 mW 40 Single -15 V -5 V - 3 1 -
RS庫存編號 890-2651
製造零件編號2SC4116-BL(TE85L,F
BrandToshiba
HK$1.549
/個 (每包:50個)
單位
NPN 150 mA 50 V SOT-323 (SC-70) Surface Mount 100 mW 70 Single 60 V 5 V - 3 1 -
RS庫存編號 756-3870
製造零件編號TPCP8902(TE85L,F)
BrandToshiba
HK$2.558
/個 (每包:10個)
單位
NPN + PNP 2 A 30 V PS Surface Mount 1.67 W 40 Isolated -30 V, 60 V -7 (PNP) V, 7 (NPN) V - 8 2 -