Littelfuse Sxx55x Series - Manual (Page 3)

323
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor ® brand Thyristors
55 Amp Standard SCRs
Sxx55x Series
Figure 1: Normalized DC Gate Trigger Current
vs. Junction Temperature
Figure 2: Normalized DC Gate Trigger Voltage
vs. Junction Temperature
125
0.0
0.5
1.0
1.5
2.0
-40 -15 10 35 60 85 110
Junction Temperature (T
J
) -- (°C)
Ratio of I
GT
/ I
GT
(T
J
= 2
5
°C)
Figure 5: Power Dissipation (Typical)
vs. RMS On-State Current
Figure 6: Maximum Allowable Case Temperature
vs. RMS On-State Current
Figure 3: Normalized DC Holding Current
vs. Junction Temperature
Figure 4: On-State Current vs. On-State Voltage
(Typical)
125
0.0
0.5
1.0
1.5
2.0
-40 -15 10 35 60 85 110
Junction Temperature (T
J
) -- (°C)
Ratio of
V
GT
/ V
GT
(T
J
= 2
5
°C)
125
0.0
0.5
1.0
1.5
2.0
-40 -15 10 35 60 85 110
Ratio of I
H
/ I
H
(T
J
= 2
5
°C)
Junction Temperature (T
J
) -- (°C)
T
J
= 25°C
0
20
40
60
80
100
120
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Instantaneous On-state Voltage (v
T
) – Volts
Instantaneous On-stat
e Cur
rent
(i
T
) –
Amps
0
10
20
30
40
50
60
0 5 10 15 20 25 30 35 40 45 50 55
RMS On-State Current [I
T(RMS)
] - (Amps)
A
v
er
ag
e On-Stat
e P
o
w
e
r Dissipation
[P
D(A
V)
] - (W
at
ts)
70
75
80
85
90
95
100
105
110
115
120
125
130
0 5 10 15 20 25 30 35 40 45 50 55 60
Maximum Allo
w
a
ble
Case
Temper
at
ur
e
(T
C
) - °C
RMS On-State Current [I
T(RMS)
] - Amps
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 180°
The "R" or "M" package rating is intended
for high surge condition use only and not
recommended for >50A rms continuous
current use since narrow pin leads depend-
ing on lead length can exceed PCB solder
melting temperature. "W" package is
recommended for >50A rms continuous
current requirements.
Note: xx = voltage