
Document Number: 93169 For technical questions, contact: ind-modules@vishay.com
www.vishay.com
Revision: 14-May-08 3
SD1553C..K Series
Fast Recovery Diodes
(Hockey PUK Version),
1650/1825 A
Vishay High Power Products
Note
• The table above shows the increment of thermal resistance R
thJ-hs
when devices operate at different conduction angles than DC
Fig. 1 - Current Ratings Characteristics
Fig. 2 - Current Ratings Characteristics
Fig. 3 - Current Ratings Characteristics
Fig. 4 - Current Ratings Characteristics
ΔR
thJ-hs
CONDUCTION
CONDUCTION ANGLE
SINUSOIDAL CONDUCTION RECTANGULAR CONDUCTION
TEST CONDITIONS UNITS
SINGLE SIDE DOUBLE SIDE SINGLE SIDE DOUBLE SIDE
180° 0.0018 0.0019 0.0012 0.0012
T
J
= T
J
maximum K/W
120° 0.0021 0.0021 0.0021 0.0021
90° 0.0027 0.0027 0.0029 0.0029
60° 0.0039 0.0039 0.0041 0.0041
30° 0.0067 0.0067 0.0068 0.0068
40
60
80
100
120
140
160
0 200 400 600 800 1000 1200
30°
60°
90°
120°
180°
A vera ge F orw a rd C urre nt (A)
Maxim um Allowable Heatsink Tem perature (°C)
Conduction Angle
SD 1 553C ..S20 K S eries
(Single Side Cooled)
R (D C) = 0.0 4 K /W
th J-hs
0
20
40
60
80
100
120
140
160
0 400 800 1200 1600 2000
30°
60°
90°
180° DC
120°
Average Forward Curren t (A)
Maximum Allow able Heatsink Temperature (°C)
Conduction Period
SD1553C..S20K Series
(Single Side Cooled)
R (DC) = 0.04 K/W
th J-hs
40
60
80
100
120
140
160
0 200 400 600 800 1000 1200
30°
60°
90°
120°
180°
Average Forward Current (A)
Maximum Allowable Heatsink Temperature (°C)
Conduction Angle
SD1553C..S30K Series
(Single Side Cooled)
R (D C) = 0.04 K /W
thJ-hs
20
40
60
80
100
120
140
160
0 400 800 1200 1600 2000
30°
60°
90°
180°
DC
120°
Average Forward Current (A)
Maximum Allowable Heatsink Temperature (°C)
Conduction Period
SD1553C..S30K Series
(Single Side Cooled)
R (DC) = 0.04 K/W
th J-hs
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