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BC174
BC171
BC172
CASE 29-02, STYLE 17
TO-92 (TO-226AA)
AMPLIFIER TRANSISTORS
NPN SILICON
Refer to BC546 for graphs.
MAXIMUM RATINGS
Rating
Collector-Emitter Voltage
Collector-Base Voltage
Emitter-Base Voltage
Collector Current - Continuous
@Total Device Dissipation T/\ = 25°C
Derate above 25°C
@Total Device Dissipation Tc = 25°C
Derate above 25°C
Operating and Storage Junction
Temperature Range
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance, Junction to Case
Thermal Resistance, Junction to Ambient
Symbol
VCEO
VCBO
VEBO
ic
PD
pd
Tj, T s tg
Symbol
Rwc
Rfljc
BC BC BC
174 171 172
65 45 25
80 50 30
6.0
100
350
2.8
1.0
8.0
-55 to +150
Max
125
357
Unit
Vdc
Vdc
Vdc
mAdc
mW
mW/°C
Watt
mW/°C
°c
Unit
°C/W
°c/w
ELECTRICAL CHARACTERISTICS (TA = 25 °C unless otherwise noted)
Characteristic
Type
Symbol
OFF CHARACTERISTICS
Collector-Emitter Breakdown Voltage
dC = 1 mA, Ib = 0)
BC174
BC171
BC172
V(BR)CE0
Emitter-Base Breakdown Voltage
E(l = 10uA, Ic = 0)
BC171
BC172
BC174
V(BR)EB0
Collector Cutoff Current
(Vce = 70 V, Vbe = 0)
(Vce = 50 v, vbe = o)
(v C e = 35 v, vbe = o>
BC174
BC171
BC172
ices
(VCE = 30 V, Ta = 125°C)
ON CHARACTERISTICS
DC Current Gain
dC = 10uA, VCE = 5 V)
BC174
BC171
BC172
BC171A/2A/4A
BC171B/2B/4B
BC172C
hFE
dC = 2 mA, VCE = 5 V)
BC174
BC171
BC172
BC171A/2A/4A
BC171B/2B/4B
BC172C
(IC = 100 mA, Vce = 5 V)
BC171A/2A/4A
BC171B/2B/4B
BC172C
Collector-Emitter Saturation Voltage
dC = 10 mA, Ib = 0.5 mA)
(IC = 100 mA, Ib = 5 mA)
(IC = 1 mA, Ib = See Note 1)
Base-Emitter Saturation Voltage
(IC = 10 mA, Ib = 0.5 mA)
Base-Emitter On Voltage
dC = 2 mA, VC E = 5 V)
(IC = 10 mA, VCE = 5 V)
mANOTE 1 : Ib is value for which Ic = 11
at Vce = 1 V.
VCE(sat)
VBE(sat)
VBE(on)
65
•45
25
6
6
6
120
120
120
120
180
380
0.55
Typ.
0.20
0.20
0.20
90
150
270
180
290
520
120
180
300
0.09
0.2
0.3
0.7
Max.
15
15
15
4
4
4
450
800
800
220
460
800
0.25
0.60
0.6
0.70
0.77
Unit
V
V
nA
uA
V
V
V
2-62

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BC174.BC171, BC172
ELECTRICAL CHARACTERISTICS (continued) (Ta = 25 °C unless otherwise noted)
Characteristic
Type
Symbol
Min.
Typ.
Max.
Unit
| ||
DYNAMIC CHARACTERISTICS, SMALL SIGNAL CHARACTERISTICS
Current-Gain Bandwidth Product
dC = 10 mA, Vce = 5 V, f = 100 MHz)
BC171
BC172
BC174
fT
150 300
150 300
150 300
MHz
Output Capacitance
(VcB = 10 V, lc = 0, f = 1 MHz)
Cobo
1.7 4.5
PF
Input Capacitance
(Vbe = 0.5 V, lc = 0, f = 1 MHz)
Input Impedance
(JC = 2 mA, Vce = 5 V, f = 1 KHz)
Voltage Feedback Ratio
dC = 2 mA, Vce = 5 V, f = 1 KHz)
BC171A/2A/4A
BC171B/2B/4B
BC172C
BC171A/2A/4A
BC171B/2B./4B
BC172C
Cjbo
hie
hre
PF
10
Kohm
1.6 2.7 4.5
3.2 4.5 8.5
6.0 8.7 15.0
-4
X10
1.5
2.0
3.0
Small-Signal Current Gain
dC = 2 mA, Vce = 5 V, f = 1 KHz)
BC171A/2A/4A
BC171B/2B/4B
BC172C
hfe
125 220 260
240 330 500
450 600 900
Output Admittance
(IC = 2 mA, VCE = 5 V, f = 1 KHz)
BC171A/2A/4A
BC171B/2B/4B
BC172C
hoe
l^mhos
8 25
10 35
12 50
Noise Figure
dC = 0.2 mA, VCE = 5 V, Rs = 2 KOhms,
f = 1 KHz, Af = 200 Hz)
BC171
BC172
BC174
NF
dB
2 10
2 10
2 10
2-63