2N5551 is a NPN Amplifier Transistor.
It is designed for general purpose applications so that it can be used for amplification and switching.
The maximum voltage from the collector to the emitter is 160V and the maximum voltage from the collector to the base is 180V, making it easy to use in circuits with a voltage below 160V.The maximum output load that this transistor can handle is 600mA and the maximum power consumption of the collector is 625mW.
This blog provides you with a basic overview of the 2N5551 transistor, including its pin descriptions, functions, applications, similar products, etc., to help you quickly understand what 2N5551 is.
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If you want to know more details about 2N5551 and its similarities 2N5451...
Catalog
2N5551 Transistors Pinout
2N5551 has three pins, the same as any other transistor, namely Emitter, Base and Collector.
2N5551 Transistors Feature
- Amplifier NPN Transistor
- High DC Current Gain (hFE), typically 80 when IC=10mA
- Continuous Collector current (IC) is 600mA
- Collector-Emitter voltage (VCE) is 160 V
- Collector-Base voltage (VCB) is 180V
- Emitter Base Voltage (VBE) is 6V
- Transition Frequency is 100MHz
- Available in To-92 Package
Note: Complete Technical Details can be found at the 2N5551 datasheet given at the end of this page.
2N5551 Transistor Alternative
2N2369, 2N3055, 2N3904, 2N3906, 2SC5200, BC549, BC636, BC639, BC547,
2N5551 Transistor Equivalent
2N5088, 2N3055, NTE194, 2N5833, 2N5401 (PNP)
2N5551 Transistor Similarities
2N5550
Where to use 2N5551
The 2N5551 is a transistor NPN amplifier with an amplification factor (hfe) of 80 when the collector current is 10mA. It also has decent switching characteristics (transition frequency is 100MHz) so low-level signals can be amplified.
Due to this feature, the transistor is commonly used to amplify audio or other low-power signals. So if you're looking for an NPN transistor for an amplifier circuit, this transistor might be the right choice.
How to use 2N5551
As stated earlier, the 2N5551 NPN transistor is widely used for amplification. A very simple bare minimum circuit for the transistor to operate as an amplifier is shown below. The simulation graph showing the amplified sine wave output can also be found.
Here the input sine wave of magnitude 8mV (yellow color) is amplified to 50mV (pink color) as shown in the graph. In the circuit referred to above, the resistors R3 and R4 form a potential divider that determines the output-base voltage (VBE). The R1 resistor is the load resistor and the R2 resistor is the emitter resistor. Changing the value of the RL will affect the output wave amplification.
A transistor is normally a current amplifier, which means the current flowing though the base will be amplified in the current flowing through the collector. This amplification depends on the amplification factor (hfe) of 80 for 2N5551. This means that the collector current will be amplified by 80 times that of the base current.
Ic = βIb
Another current that we have taken into account is the emitter current (IE), but due to the transistor action, we assume that the emitter current is almost equal to the Collector current value, although the difference between the two can be found with the value of 5-007. Normally, the value of the current collector is given by e:
IE = IC + IB
The output is obtained through the collector, which is the Collector-Emitter voltage (VCE). This output voltage depends on the input voltage (Vcc, here 12V) without the voltage drop over the load resistor (R1). The output voltage Vout can therefore be specified as
Vout = VCE = (Vcc – IcRc)
2N5551 Transistor Application
- Low power amplifiers
- Current amplifiers
- Small signal boosters
- Audio or other signal amplifiers
- Darlington pair
2N5551 Transistor Package
If you are designing a PCD or Perf board with this component, the following picture from the 2N5551 Datasheet will be useful to know its package type and dimensions.
That’s all for our introduction to 2N5551. If you find this blog useful, please bookmark our website Apogeeweb, we will provide you with electronic component blogs, industry news, tools, etc. that you are interested in. Stay tuned for our next blog...
Component Datasheet
Ordering & Quality
| Photo | Mfr. Part # | Company | Description | Package | Qty | Pricing (USD) |
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2N5551BU | Company:ON Semiconductor | Remark:TRANS NPN 160V 0.6A TO-92 | Package:TO-226-3, TO-92-3 (TO-226AA) |  DataSheet |
In Stock:3865 Inquiry |
Price:
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2N5551TA | Company:ON Semiconductor | Remark:TRANS NPN 160V 0.6A TO-92 | Package:TO-226-3, TO-92-3 (TO-226AA) (Formed Leads) | DataSheet |
In Stock:6000 Inquiry |
Price:
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Inquiry |
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