25ria series, Vishay high power products, Medium power thyristors (stud version), 25 a – C&H Technology 25RIA Series User Manual
Page 5: Thermal and mechanical specifications, Conduction

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Document Number: 93701
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Revision: 19-Sep-08
25RIA Series
Vishay High Power Products
Medium Power Thyristors
(Stud Version), 25 A
Note
• The table above shows the increment of thermal resistance R
thJC
when devices operate at different conduction angles than DC
Fig. 1 - Current Ratings Characteristics
Fig. 2 - Current Ratings Characteristics
THERMAL AND MECHANICAL SPECIFICATIONS
PARAMETER SYMBOL
TEST
CONDITIONS
VALUES
UNITS
Maximum operating junction
and storage temperature range
T
J
, T
Stg
- 65 to 125
°C
Maximum thermal resistance,
junction to case
R
thJC
DC operation
0.75
K/W
Maximum thermal resistance,
case to heatsink
R
thCS
Mounting surface, smooth, flat and greased
0.35
Allowable mounting torque
Non-lubricated threads
3.4
+ 0 - 10 %
(30)
N · m
(lbf
⋅ in)
Lubricated threads
23
+ 0 - 10 %
(20)
Approximate weight
14
g
0.49
oz.
Case style
See dimensions - link at the end of datasheet
TO-208AA (TO-48)
ΔR
thJC
CONDUCTION
CONDUCTION ANGLE
SINUSOIDAL CONDUCTION
RECTANGULAR CONDUCTION
TEST CONDITIONS
UNITS
180°
0.17
0.13
T
J
= T
J
maximum
K/W
120°
0.21
0.22
90°
0.27
0.30
60°
0.40
0.42
30°
0.69
0.70
80
90
100
110
120
130
0
5
10
15
20
25
30
30°
60°
90°
120°
180°
Average On-state Current (A)
M
a
x
im
u
m
A
llo
w
a
b
le C
a
s
e
T
e
m
perat
u
re
(°
C
)
Conduction Angle
25RIA Series
R (DC) = 0.75 K/W
thJC
80
90
100
110
120
130
0
10
20
30
40
DC
30°
60°
90°
120°
180°
Average On-state Current (A)
M
a
x
im
u
m
A
llo
w
a
b
le C
a
s
e
T
e
m
p
er
at
ure
(
°C
)
Conduction Period
25RIA Series
R (DC) = 0.75 K/W
thJC