Teccor, Brand thyristors, 10 amp sensitive & standard scrs – Littelfuse Sxx10x Series User Manual
Page 4: Thermal resistances
270
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor
®
brand Thyristors
10 Amp Sensitive & Standard SCRs
Sxx10xSx & Sxx10x Series
Thermal Resistances
Symbol
Parameter
Value
Unit
R
T(J-C)
Junction to case (AC)
Sxx10RSy
1.6
°C/W
Sxx10LSy
3.0
Sxx10VSy
1.7
Sxx10DSy
1.45
Sxx10R
1.6
Sxx10L
3.0
Sxx10V
1.7
Sxx10D
1.45
R
T(J-A)
Junction to ambient
Sxx10RSy
40
°C/W
Sxx10LSy
65
Sxx10VSy
85
Sxx10R
40
Sxx10L
50
Sxx10V
70
Note: xx = voltage, y = sensitivity
Figure 1: Normalized DC Gate Trigger Current
vs. Junction Temperature (Sensitive SCR)
Figure 2: Normalized DC Gate Trigger Current
vs. Junction Temperature (Standard SCR)
0.0
1.0
2.0
3.0
4.0
-40
-15
10
35
60
85
110
Junction Temperature (T
J
) -- (°C)
Ratio of I
GT
/ I
GT
(T
J
= 2
5
°C)
125
0.0
1.0
2.0
3.0
4.0
-40
-15
10
35
60
85
110
Junction Temperature (T
J
) -- (°C)
Ratio of I
GT
/ I
GT
(T
J
= 2
5
°C)