C550 Bipolar Transistors ��� NPN
The BC550 is a low-noise, general-purpose NPN epitaxial silicon transistor in a TO-92 package. It is optimized for amplifier and switching applications where low noise and moderate voltage handling (up to 45 V collector���emitter) are required

Features
- Switching and Amplifier functionality
- High���Voltage capability (VCEO��up to 45���V)
- Low���Noise performance (noise figure down to 1.4���dB)
- Complementary to BC556, BC557, BC558, BC559, and BC560 series
- Pb���Free Device, RoHS���compli"1" loading="lazy" decoding="async" class="wp-image-466933 aligncenter lazyloaded" src="https://i0.wp.com/makerselectronics.com/wp-content/uploads/2022/11/20241022132401410.jpg?resize=632%2C487&ssl=1" alt="" width="632" height="487" data-src="https://i0.wp.com/makerselectronics.com/wp-content/uploads/2022/11/20241022132401410.jpg?resize=632%2C487&ssl=1" data-eio-rwidth="632" data-eio-rheight="487">
Specifications
Absolute Maximum Ratings (TJ��= 25�����C)
| Parameter |
Symbol |
Value |
Unit |
| Collector���Base Voltage |
VCBO
|
50 |
V |
| Collector���Emitter Voltage |
VCEO
|
45 |
V |
| Emitter���Base Voltage |
VEBO
|
5 |
V |
| Collector Current (DC) |
IC
|
100 |
mA |
| Collector Power Dissipation |
PC
|
500 |
mW |
| Junction Temperature |
TJ
|
150 |
��C |
| Storage Temperature Range |
TSTG
|
���65 to +150 |
��C |
Electrical Characteristics (TCï"1020">
| Parameter |
Symbol |
Test Conditions |
Min |
Typ |
Max |
Unit |
| Collector Cut���off Current |
ICBO
|
VCB��= 30���V, IE��= 0 |
��� |
��� |
15 |
nA |
| DC Current Gain |
hFE
|
VCE��= 5���V, IC��= 2���mA |
110 |
��� |
800 |
��� |
| VCE(sat)��(low���current) |
��� |
IC��= 10���mA, IB��= 0.5���mA |
��� |
90 |
250 |
mV |
| VCE(sat)��(high���current) |
��� |
IC��= 100���mAd>
|
��� |
VCE��= 5���V, IC��= 2���mA |
580 |
660 |
700 |
mV |
| VBE(on)��(at 10���mA) |
��� |
VCE��= 5���V, IC��= 10���mA |
��� |
720 |
��� |
mV |
| VBE(sat)
|
��� |
IC��= 10���mA, IB��= 0.5���mA |
��� |
700 |
��� |
mV |
| VBE(sat)��(high���current) |
��� |
IC��= 100���mA, IB��= 5���mA |
��� |
900 |
��� |
mV |
| Current Gain Bandwidth |
fT
|
VCEcitance |
Cob
|
VCB��= 10���V, IE��= 0, f = 1���MHz |
��� |
3.5 |
6.0 |
pF |
| Input Capacitance |
Cib
|
VEB��= 0.5���V, IC��= 0, f = 1���MHz |
��� |
9 |
��� |
pF |
| Noise Figure (BC550) |
N.F. |
VCE��= 5���V, IC��= 200�����A, f = 1���kHz, RG��
|

Applications
-
Audio Amplifiers and Preamplifiers: Provides clean, low-noise signal amplification.
-
Signal Amplification: Ideal for sensors, detectors, and other sensitive devices.
-
Switching Circuits: Used in digital logic and control systems.
-
Oscillator Circuits: Suitable for generating signals in various frequency ranges.