Littelfuse Sxx08x Series - Manual (Page 4)

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)