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Bipolar transistor NPN BC547B 50V/0,1A - 5pcs
The BC547B transistor is an NPN bipolar component in a TO-92 package with an hFE gain from 200 to 450, intended for switching circuits and amplifiers.
- Collector current up to 0.1 A, collector-emitter voltage 45 V
- Through-hole TO-92 package for a breadboard
- 5 transistors in the package
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BC547B: an NPN transistor in a TO-92 package
BC547 in the BC547B version is a general-purpose NPN bipolar transistor in a TO-92 package, which conducts a collector current of up to 0.1 A at an hFE gain from 200 to 450. The manufacturer onsemi intends it for linear circuits, such as amplifiers, and for switching circuits.
The collector-emitter voltage is at least 45 V, and the collector-base voltage is 50 V. The package contains 5 pieces, which you can plug into an 830-point breadboard together with 10 kΩ resistors. For circuits that require a PNP transistor, choose the BC557C.
BC547B NPN bipolar transistor, 5 pcs.
0.1 A
max. continuous collector current
45 V
collector-emitter voltage VCEO
200-450
current gain hFE
5
transistors in the package
BC547B NPN bipolar transistor, 5 pcs.
BC547B parameters from the datasheet
The transistor goes into saturation at a collector-emitter voltage of at most 0.6 V, and the base-emitter voltage in saturation is 0.9 V. In the on state the base-emitter voltage is 0.66 V.
The maximum power dissipation in the TO-92 package is 0.625 W, and the transition frequency is at least 150 MHz. The emitter-base voltage must not exceed 6 V.
Is it a good choice for you?
A good choice if:
- you are building a transistor switch for an LED or a small relay up to 0.1 A
- you are learning electronics on a breadboard and need a few NPN transistors
- you need a transistor with a high hFE gain from 200 to 450
Consider another option if:
- you switch a current larger than 0.1 A, e.g. a motor or an LED strip
- your circuit requires a PNP transistor: choose the BC557C
Fun fact
Faster than its looks suggest
A small transistor in a TO-92 package is associated with simple switches, yet the BC547B has a transition frequency of at least 150 MHz.
Source: onsemi: BC547B
Frequently asked questions
What is a BC547 equivalent?
Choose an NPN transistor with a collector-emitter voltage of at least 45 V, a collector current of 0.1 A and a similar hFE gain, comparing the parameters from the datasheets of both transistors.
Will the BC557 replace the BC547?
No. The BC557C is a PNP transistor and the BC547B is an NPN, so they work with reversed voltage polarity and cannot replace each other in the same circuit.
What voltage can the BC547B withstand?
The collector-emitter voltage is at least 45 V, collector-base 50 V and emitter-base 6 V. The continuous collector current can be up to 0.1 A at a power of up to 0.625 W.
Technical specifications
| Parameter | Value |
|---|---|
| Type | NPN bipolar transistor, general purpose |
| Marking | BC547B |
| Package | TO-92, through-hole (THT) |
| Collector-emitter voltage VCEO | min. 45 V |
| Collector-base voltage VCBO | 50 V |
| Emitter-base voltage VEBO | 6 V |
| Collector current IC | 0.1 A, continuous |
| Power dissipation | max. 0.625 W |
| Gain hFE | 200-450 |
| VCE(sat) | max. 0.6 V |
| VBE(sat) | 0.9 V |
| VBE(on) | 0.66 V |
| Transition frequency fT | min. 150 MHz |
| Number of pieces in the package | 5 |
Useful links
| Name | Value |
|---|---|
| Width | 5 cm |
| Height | 0.5 cm |
| Depth | 8.5 cm |
| Weight | 0.001 kg |
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30 days to return, without giving a reason
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Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
