WEET BC817 NPN and BC807 PNP Small Signal Bipolar BJT Transistors SOT-23 TO-236

BC817 serie NPN and BC807 serie PNP are complementary types:


SOT-23(TO-236) BC817 THRU BC818 (BC817-16, BC817-25, BC817-40, BC818-16, BC818-25, BC818-40) NPN Small Signal Bipolar (BJT) Transistors

Datasheet: https://weetcl.com/pdf/WEET_Transistors_SOT-23_BC817_BC818.pdf


SOT-23(TO-236) BC807 THRU BC808 (BC807-16, BC807-25, BC807-40, BC808-16, BC808-25, BC808-40) PNP Silicon Small (BJT) Transistors

Datasheet: https://weetcl.com/pdf/WEET_Transistors_SOT-23_BC807_BC808.pdf


Applications: switching, AF driver and amplifier  


The difference between PNP and NPN, they have different compositions: 

PNP type transistor is a transistor composed of two P-type semiconductors sandwiched between one N-type semiconductor; 

NPN type transistor is composed of three semiconductors, including two N-type and one P-type semiconductors, with the P-type semiconductor in the middle and two N-type semiconductors on both sides.


The working principle of PNP and NPN is the same, that is, a transistor is a control element mainly used to control the size of the current. 

Taking the common emitter connection method as an example, when there is a small change in the base voltage UB, the base current IB will also have a small change. Under the control of the base current IB, the collector current IC will have a large change, and the larger the base current IB, the larger the collector current IC; On the contrary, the smaller the base current, the smaller the collector current, that is, the base current controls the change in collector current. But the change in collector current is much greater than the change in base current, which is the amplification effect of the transistor. The ratio of the change in IC to the change in IB is called the amplification factor of the transistor β, The amplification factor of the transistor β Usually in the tens to hundreds of times.


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WEET Small Signal Transistors NPN and PNP Bipolar Junction Transistors SOT-23 TO-236

WEET is specialized in manufacturing Small Signal Transistors also called as Bipolar Junction Transistors.


Bipolar Junction Transistors are transistors which are made up of 3 regions, the base, the collector, and the emitter. 


Bipolar junction transistors come in two main types, NPN and PNP. 


NPN transistor is one in which the majority current carrier are electrons. Electron flowing from the emitter to the collector forms the base of the majority of current flow through the transistor. The other type of charge, holes, are a minority. 


PNP transistors are the opposite. In PNP transistors, the majority current carrier are holes.


Type

Package

Packing

SPQ

MOQ

BC807-16

SOT-23

T&R

3K

30,000

BC807-25

SOT-23

T&R

3K

30,000

BC807-40

SOT-23

T&R

3K

30,000

BC817-16V

SOT-23

T&R

3K

30,000

BC817-25V

SOT-23

T&R

3K

30,000

BC817-40V

SOT-23

T&R

3K

30,000

MMBT5401

SOT-23

T&R

3K

30,000

MMBT5551

SOT-23

T&R

3K

30,000

BC847B

SOT-23

T&R

3K

30,000

BC847C

SOT-23

T&R

3K

30,000

BC857B

SOT-23

T&R

3K

30,000

BC857C

SOT-23

T&R

3K

30,000

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Skype, Email: info@weediode.com

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