Data Sheet
BC546 / BC547 / BC548 / BC549 / BC550 — NPN Epitaxial Silicon Transistor
© 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com
BC546 / BC547 / BC548 / BC549 / BC550 Rev. 1.1.1 2
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. Values are at T
A
= 25°C unless otherwise noted.
Electrical Characteristics
Values are at T
A
= 25°C unless otherwise noted.
h
FE
Classification
Symbol Parameter Value Unit
V
CBO
Collector-Base Voltage
BC546 80
VBC547 / BC550 50
BC548 / BC549 30
V
CEO
Collector-Emitter Voltage
BC546 65
VBC547 / BC550 45
BC548 / BC549 30
V
EBO
Emitter-Base Voltage
BC546 / BC547 6
V
BC548 / BC549 / BC550 5
I
C
Collector Current (DC) 100 mA
P
C
Collector Power Dissipation 500 mW
T
J
Junction Temperature 150 °C
T
STG
Storage Temperature Range -65 to +150 °C
Symbol Parameter Conditions Min. Typ. Max. Unit
I
CBO
Collector Cut-Off Current V
CB
= 30 V, I
E
= 0 15 nA
h
FE
DC Current Gain V
CE
= 5 V, I
C
= 2 mA 110 800
V
CE
(sat)
Collector-Emitter Saturation
Voltage
I
C
= 10 mA, I
B
= 0.5 mA 90 250
mV
I
C
= 100 mA, I
B
= 5 mA 250 600
V
BE
(sat) Base-Emitter Saturation Voltage
I
C
= 10 mA, I
B
= 0.5 mA 700
mV
I
C
= 100 mA, I
B
= 5 mA 900
V
BE
(on) Base-Emitter On Voltage
V
CE
= 5 V, I
C
= 2 mA 580 660 700
mV
V
CE
= 5 V, I
C
= 10 mA 720
f
T
Current Gain Bandwidth Product
V
CE
= 5 V, I
C
= 10 mA,
f = 100 MHz
300 MHz
C
ob
Output Capacitance V
CB
= 10 V, I
E
= 0, f = 1 MHz 3.5 6.0 pF
C
ib
Input Capacitance V
EB
= 0.5 V, I
C
= 0, f = 1 MHz 9 pF
NF
Noise
Figure
BC546 / BC547 / BC548
V
CE
= 5 V, I
C
= 200 μA,
f = 1 kHz, R
G
= 2 kΩ
2.0 10.0
dB
BC549 / BC550 1.2 4.0
BC549
V
CE
= 5 V, I
C
= 200 μA,
R
G
= 2 kΩ, f = 30 to 15000 MHz
1.4 4.0
BC550 1.4 3.0
Classification A B C
h
FE
110 ~ 220 200 ~ 450 420 ~ 800