Littelfuse Sxx40x Series - Manual (Page 4)

316
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor ® brand Thyristors
40 Amp Standard SCRs
Sxx40x Series
Figure 7: Maximum Allowable Case Temperature
vs. Average On-State Current
Figure 8: Maximum Allowable Ambient Temperature
vs. RMS On-State Current
Figure 9: Maximum Allowable Ambient Temperature vs. Average On-State Current
80
85
90
95
100
105
110
115
120
125
130
0 5 10 15 20 25
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
Average On-State Current [I
T(AVE)
] - Amps
Maximum Allo
w
able
Case T
emper
at
ur
e
(T
C
) - °C
0
20
40
60
80
100
120
0.0 0.5 1.0 1.5 2.0 2.5
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
Maximum Allo
w
able Ambient
Temper
at
ur
e (T
A
) - °C
RMS On-State Current [I
T(RMS)
] - Amps
0
20
40
60
80
100
120
0.0 0.5 1.0 1.5
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
FREE AIR RATING
Average On-State Current [I
T(AVE)
] - Amps
Maximum Allo
w
able
Ambient
Temper
a
tu
re
(Tc) - °C
Figure 10: Peak Capacitor Discharge Current Figure 11: Peak Capacitor Discharge Current Derating
100
1000
10000
0.5 1.0 10.0 50.0
Pulse Current Duration (t
w
) - ms
P
eak Disc
har
g
e
Cur
rent (I
TM
) -
Amps
I
TRM
t
W
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0 25 50 75 100 125 150
Case Temperature (T
C
) - °C
Nor
maliz
ed P
e
ak Cur
rent