BT151
TYPICAL CHARACTERISTICS
Fig 1. Maximum On-State Dissipation,
p
tot
, Versus Average On-State Current,
I
T(AV)
, Where a=form factor=I
T(RMS)
/I
T(AV)
Conduction form
angle
factor
degrees
a
4
30
2.8
60
10
2.2
90
1.9
120
1.57
180
SCR
15
Ptot/W
Fig 2. Maximum Permissible Non-Repetitive Peak
On-State Current ITSM,Versus Pulse Width tp
,
for
Sinusoidal Currents, tp
≤
10ms
Tmb(max)/°C
ITSM/A
105.5 1000
1.9
α=1.57
112
100
I
T
118.5
α
T
2.2
2.8
4
dIT/dt limit
I
TSM
time
100µs
T/s
1ms
10ms
5
0
0
1
2
3
4 5
IT(AV)/A
6
7 8
125
T
J
initial=25°C max
10
10µs
Fig 3. Maximum Permissible Rms Current
lT(RMS), Versus Mounting Base
Temperature Tmb
IT(RMS)/A
15
109
°
C
10
Fig 4. Maximum Permissible Non-Repetitive
Peak On-State Current I
TSM
,Versus Number Of
Cycles,For Sinusoidal Currents, f=50HZ
ITSM/A
120
I
TSM
I
T
100
T
time
80
T
J
initial=25°C max
60
5
40
20
0
-50
0
50
100
Tmb/
°
C
150
0
1
10
100
1000
Number Of Half Cycles At 50Hz
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