Teccor, Brand thyristors, 8 amp sensitive & standard scrs – Littelfuse Sxx08x Series User Manual
Page 4: Thermal resistances
258
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor
®
brand Thyristors
8 Amp Sensitive & Standard SCRs
Sxx08xSx & Sxx08x Series
Thermal Resistances
Symbol
Parameter
Value
Unit
R
T(J-C)
Junction to case (AC)
Sxx08RSy
1.8
°C/W
Sxx08LSy
3.4
Sxx08VSy
2.1
Sxx08DSy
1.5
Sxx08R
1.8
Sxx08L
3.4
Sxx08V
2.0
Sxx08D
1.5
R
T(J-A)
Junction to ambient
Sxx08RSy
40
°C/W
Sxx08LSy
65
Sxx08VSy
85
Sxx08R
40
Sxx08L
50
Sxx08V
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)