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 145-5619
製造零件編號MMBT5962
HK$0.226
個 (在毎卷:3000)
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NPN 100 mA 45 V SOT-23 Surface Mount 350 mW 600 Single 45 V 8 V - 3 1 -
RS庫存編號 711-5121
製造零件編號ZXTP2012ASTZ
HK$5.096
/個 (每包:5個)
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PNP 3.5 A 60 V E-Line Through Hole 5.7 W 10 Single -100 V -7 V 120 MHz 3 1 -
RS庫存編號 163-2014
製造零件編號2SD1624S-TD-E
HK$2.015
個 (在毎卷:1000)
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NPN 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 169-8612
製造零件編號BC547CBU
HK$0.239
個 (以毎袋:1000)
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NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS庫存編號 711-4875
製造零件編號MMBT2907A-7-F
HK$0.377
/個 (每包:100個)
單位
PNP 600 mA 60 V SOT-23 Surface Mount 300 mW 50 Single -60 V -5 V - 3 1 -
RS庫存編號 183-4880
製造零件編號2SC5876U3T106
BrandROHM
HK$1.017
/個 (每包:60個)
單位
NPN 500 mA 60 V SOT-323 Surface Mount 200 mW 120 Single 60 V 6 V 100 MHz 3 1 -
RS庫存編號 146-0467
製造零件編號PMST3906,115
BrandNexperia
HK$0.211
個 (在毎卷:3000)
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PNP 200 mA 40 V SOT-323 (SC-70) Surface Mount 200 mW 30 Single 40 V 6 V - 3 1 -
RS庫存編號 166-0092
製造零件編號BCM856BS,115
BrandNexperia
HK$1.27
個 (在毎卷:3000)
單位
PNP 100 mA 65 V SOT-363 (SC-88) Surface Mount 200 mW 200 Isolated -80 V -5 V 175 MHz 6 2 -
RS庫存編號 805-1914
製造零件編號NJVMJD32CT4G
HK$3.93
/個 (每包:25個)
單位
PNP 3 A 100 V DPAK (TO-252) Surface Mount 15 W 10 Single 100 V 5 V 1 MHz 3 1 -
RS庫存編號 166-2253
製造零件編號MJD44H11TF
HK$2.402
個 (在毎卷:2000)
單位
NPN 8 A 80 V DPAK (TO-252) Surface Mount 20 W 40 Single 10 V 5 V 1 MHz 3 1 -
RS庫存編號 163-0922
製造零件編號D44VH10G
HK$4.389
毎管:50 個
單位
NPN 15 A 80 V TO-220AB Through Hole 83 W 20 Single - 7 V 20 MHz 3 1 -
RS庫存編號 857-8753
製造零件編號SMBTA06E6433HTMA1
BrandInfineon
HK$0.194
個 (在毎卷:10000)
單位
NPN 500 mA 80 V SOT-23 Surface Mount 330 mW 100 Single 80 V 4 V 100 MHz 3 1 -
RS庫存編號 725-8571
製造零件編號PXT2222A,115
BrandNexperia
HK$2.583
/個 (每包:10個)
單位
NPN 100 mA 40 V SOT-89 Surface Mount 1.1 W 35 Single 60 V 6 V - 3 1 -
RS庫存編號 168-6055
製造零件編號TIP36C
HK$10.707
毎管:30 個
單位
PNP 25 A 100 V TO-247 Through Hole 125 W 10 Single 100 V 5 V 3 MHz 3 1 -
RS庫存編號 911-4726
製造零件編號BFR93AE6327HTSA1
BrandInfineon
HK$0.622
個 (在毎卷:3000)
單位
NPN 35 mA 12 V SOT-23 (TO-236AB) Surface Mount 300 mW 40 Single 15 V 2 V 6000 MHz 3 1 -
RS庫存編號 177-5500
製造零件編號2N2907ADCSM
BrandSemelab
HK$324.354
Each (In a Tray of 100)
單位
PNP 600 mA 60 V LCC 2 Surface Mount 350 mW 50 Isolated -60 V -5 V - 6 2 -
RS庫存編號 897-7188
製造零件編號BFP420FH6327XTSA1
BrandInfineon
HK$2.264
/個 (每包:30個)
單位
NPN 60 mA 15 V TSFP Surface Mount 210 mW 60 Single 15 V 1.5 V - 4 1 -
RS庫存編號 671-1119
製造零件編號BC33740TA
HK$1.241
/個 (每包:10個)
單位
NPN 800 mA 45 V TO-92 Through Hole 625 mW 170 Single - 5 V 100 MHz 3 1 -
RS庫存編號 475-9762
製造零件編號2SC2412KT146Q
BrandROHM
HK$0.532
/個 (每包:100個)
單位
NPN 150 mA 50 V SMT Surface Mount 200 mW 120 Single 60 V 7 V 180 MHz 3 1 -
RS庫存編號 145-3342
製造零件編號2SC5994-TD-E
HK$1.19
個 (在毎卷:1000)
單位
NPN 2 A 50 V PCP Surface Mount 3.5 W 200 Single 100 V 6 V 1 MHz 3 1 -