Littelfuse Sxx12x Series - Manual (Page 4)

4
Revised: 01/06/14
Specifications are subject to change without notice.
©2014 Littelfuse, Inc
Teccor ® brand Thyristors
12 Amp Standard SCRs
Sxx12x Series
Figure 6: Maximum Allowable Case Temperature
vs. RMS On-State Current
Figure 7: Maximum Allowable Case Temperature
vs. Average On-State Current
60
70
80
90
100
110
120
130
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
0 1 2 3 4 5 6 7 8
Average On-State Current [I
T(AVE)
] - Amps
Maximum
Allo
w
able Case
Te
mper
at
ur
e (T
C
) - °C
Sxx12L
Sxx12R
Sxx12V
Sxx12D
60
70
80
90
100
110
120
130
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
0 2 4 6 8 10 12 14
RMS On-State Current [I
T(RMS)
] - Amps
Maximum
Allo
w
able
Case
Te
mper
at
ur
e (T
C
)- °C
Sxx12R
Sxx12V
Sxx12D
Sxx12L
Figure 8: Maximum Allowable Ambient Temperature
vs. RMS On-State Current
0
20
40
60
80
100
120
0.0
RMS On-State Current [I
T(RMS)
] - Amps
Maximum
Allo
w
able
Ambient
Te
mper
at
ur
e (T
A
) - °C
0.5 1.0 1.5 2.0 2.5 3.0
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
3.5
Sxx12L
Sxx12V
Sxx12R
Figure 9: Maximum Allowable Ambient Temperature
vs. Average On-State Current
0
20
40
60
80
100
120
0 . 0
Sxx12V
Average On-State Current [I
T(AVE)
] - Amps
Maximum
Allo
w
able
Ambient
Te
mper
at
ur
e (T
A
) - °C
0.5 1.0 1.5 2.0
Sxx12R
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
Sxx12L
Note: xx = voltage
Figure 10: Peak Capacitor Discharge Current
10
100
1000
0 . 0 5 0 . 5 2 0 . 5 5. 0
Peak Disc
har
ge
Cur
rent (I
TM
) -
Amps
Pulse Current Duration (t
w
) - ms
I
TRM
t
W
Figure 11: Peak Capacitor Discharge Current Derating
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0 25 50 75 100 125 150
Nor
maliz
ed P
eak Cur
rent
Case Temperature (T
C
) - °C