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This is the European "Pro-electron" numbering system compared with the US JEDEC system (2N etc)
First - Letter
A = Germanium Device
B = Silicon Device
C = Gallium Arsenide
Second - Letter for A/B/C devices
A = small signal diode
C = small signal general purpose transistor (for audio or slow speed switching)
D = power transistor (audio and low frequency applications_
F = small signal RF transistor
T = SCR / Thyristor
U = power transistor for switching applications
Y = rectifier diode
Third + Fourth + Fifth - Unique identifier number
Some manufacturers put some significance on the number. For example Mullard/Philips treated the second digit of 4 meaning NPN Lockfit case and 5 meaning PNP lockfit. Many used 6 for TO92 cases.
An optional letter followed indicating a gain grouping ... typically A being lowest, B middle and C highest
Different manufacturers created similar transistors with different type markings.
e.g. BC107 BC167 all functionally very similar.
So, the BC147 is a Silicon small signal audio transistor with a "Lockfit case" originally manufactured by/for Philips/Mullard. A viable replacement today, if you can't find a 147 is a BC547 If there's a gain grouping letter, you need to match the gain grouping either by a comparable letter, or by testing. Careful with the pinout.
There are a cluster of similar transistors ...
So, the BC147 is one of a cluster of 3 similar transistors ... BC147/148/149. BC147 has ratings of VCE 50, VCB 45 ICMAX 100 hfe 125-500
BC148 has ratings of VCE 30, VCB 20 ICMAX 100 hfe 125-500
BC149 has ratings of VCE 30, VCB 20 ICMax 100 hfe 240-900 Noise 2dB
Lockfit transistor pinout (wideface down)
B
E C
BC547 pinout (flatface down)
E B C
BC-147 was an extremely popular NPN transistor originally released in the mid 1070s bt Philips Semiconductor for Audio applications. Its parameters are as follows: Vcbmax= 50V, Vcemax = 45V, Vedmax=6V, Icmax=200 mA, Tjmax= 125C, Ptot= 250 mWf Ftmin=150M HFE= 110mn HFE bias= 2mA. Other variations of the BC-147 are BC-147A, BC-147B, BC-148, BC-148A, BC-148B, BC-148C, BC-149, BC-149B and BC-149C with slight variations mostly in the HFE (gain) parameter. The group was referred to as the BC-147 family. All members were NPN. None of the transistors of the BC-147 are manufactured anymore. However there are many other equivalents available. Data sheets for the BC-147 family are are easily available all over the internet as well as in various electronics reference books.
> BC 147 CODE stands for base collector transistor where the amplifying factor is 147
Whoever wrote that made it up.
B is the junction material. In this case, Silicon.
C is the application. In this case it means low power audio frequency.
147 is just a number with no particular system.
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What are the Similar transistor for 221334 PNP transistor?
Similar to a 2N3906 PNP transistor
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I believe that is resistor transistor technology TTL transistor transistor logic
What does the base do in a transistor?
It depends on the transistor, you just have to look at the data sheet for the transistor.
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The BJT is the bipolar junction transistor, the PCT is the point contact transistor, the UJT is the uni-junction transistor, the SBT is the surface barrier transistor, the FET is the field effect transistor, the GJT is the grown-junction transistor, the AJT is the alloy-junction transistor, and the DFT is the drift field-junction transistor.
Do Transistor have a polarity?
Transistors have many characteristics and they most certainly require voltages to be a certain polarity if they are to work properly. There are two main types of transistor: PNP and NPN. They are identical except that all polarities are reversed on one compared to the other. There are many books and online resources that describe transistors but here is a very brief note about transistor operation. Each transistor has a base, a collector and an emitter. When a small current is passed from the base to the emitter, a larger current will pass from the collector the the emitter. With an NPN transistor, the base needs to be positive with respect to the emitter and the collector also has to be positive with respect to the emitter for the transistor to work. A PNP transistor is reversed, where both the base and the collector need to be negative with respect to the emitter to operate. Therefore, transistors do indeed have a polarity, even if it is more complex that some other devices. Disclaimer: The above description of transistor operation is greatly simplified and there are operational modes that are outside the conditions described. Please don't use the above description as a definitive guide to transistor behaviour.
What is Si transistor?
A silicon transistor is a transistor made of silicon.
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The active region of a transistor is when the transistor has sufficient base current to turn the transistor on and for a larger current to flow from emitter to collector. This is the region where the transistor is on and fully operating.
What is the purpose of the Unijunction Transistor?
A Unijunction Transistor is a transistor that acts solely as a switch.
What are the Similar transistor for 221334 PNP transistor?
Similar to a 2N3906 PNP transistor
How does a transistor behaviour?
how does a transistor behaviour
Different between power transistor and transistor that used in small signal?
Power transistor can conduct large amount of currents through it, more than small signal transistor. power transistor has a vertical structure and small signal transistor has horizontal structure.In power transistor quasi saturation region is present which is absent in the small signal transistor. In power transistor there is a inculsion of drift layer which is not there in the small signal transistor. Power dissipation is less in power transistor and it is more in small signal transistor. b.v.polytechnic,vasai pushkar vaity.
What is rt in electronics?
I believe that is resistor transistor technology TTL transistor transistor logic
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I can give you several sentences.I bought a transistor radio.The transistor amplified the signal.We studied the transistor in science class.
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A Darlington pair uses two transistors connected to behave as a single transistor with a very high current gain (beta). Transistor-1 has its collector connected to the collector of transistor-2. Transistor-1 has its emitter connected to the base of transistor-2. The base of transistor-1 with the emitter and collector of transistor-2 is used as a single transistor.
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no is not !
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the best way is to compeair the data sheet of that transistor to the readings of that transistor. . . . .and u can get the readings of that transistor by using a fungction genrator and a c.r.o
