Littelfuse Sxx35x Series - Manual (Page 4)

308
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor ® brand Thyristors
35 Amp Standard SCRs
Sxx35x Series
10
100
1000
1 10 100 1000
Surge Current Duration -- Full Cycles
P
eak S
u
rg
e
(N
on-r
e
p
etitive)
O
n
-state C
u
rr
e
n
t
(I TS
M
) –
A
m
p
s
Figure 7: Maximum Allowable Case Temperature vs.
Average On-State Current
105
80
85
90
95
100
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
M
axi
m
u
m
A
ll
o
w
a
b
le C
ase
T
e
m
p
er
at
u
re (
T C
) - °
C
Figure 8: Peak Capacitor Discharge Current
Figure 9: Peak Capacitor Discharge Current Derating
10
100
1000
0.5 1.0 10.0 50.0
Pulse Current Duration (t
w
) - ms
P
eak D
isch
a
rg
e C
u
rr
e
n
t (
I TM
) - Am
p
s
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
N
o
rm
al
iz
ed
P
e
ak C
u
rr
e
n
t
Case Temperature (T
C
) - °C
Figure 10: Surge Peak On-State Current vs. Number of Cycles
SUPPLY FREQUENCY: 60 Hz Sinusoidal
LOAD: Resistive
RMS On-State Current: [I
T(RMS)
]: Maximum Rated
Value at Specified Case Temperature
Notes:
1. Gate control may be lost during and immediately
following surge current interval.
2. Overload may not be repeated until junction
temperature has returned to steady-state
rated value.