®
Table 1: Main Product Characteristics
I
V
T
j
V
F
F(AV)
RRM
(max)
(typ)
20 A
120 V
175°C
0.54 V
FEATURES AND BENEFITS
■ High junction temperature capability
■ Avalanche rated
■ Low leakage current
■ Good trade-off between leakage current and
forward voltage drop
DESCRIPTION
Single Schottky rectifier suited for high frequency
Switch Mode Power Supply.
Packaged in TO-220AC, this device is intended to
be used in notebook & LCD adaptors, desktop
SMPS, providing in these applications a margin
between the remaining voltages applied on the
diode and the voltage capability of the diode.
STPS20120D
POWER SCHOTTKY RECTIFIER
A
K
TO-220AB
STPS20120D
Table 2: Order Code
Part Number Marking
STPS20120D STPS20120D
K
A
K
Table 3: Absolute Ratings (limiting values)
Symbol Parameter Value Unit
V
RRM
I
F(RMS)
I
F(AV)
I
FSM
P
ARM
T
T
dPtot
* : thermal runaway condition for a diode on its own heatsink
------------- --
dTj
February 2004
Repetitive peak reverse voltage 120 V
RMS forward voltage 30 A
Average forward current
Surge non repetitive forward current
Repetitive peak avalanche power
Storage temperature range -65 to + 175 °C
stg
Maximum operating junction temperature * 175 °C
j
1
--------------- ----------->
Rth j a
–()
δ = 0.5 T
t
= 10ms sinusoidal
p
t
= 1µs Tj = 25°C
p
REV. 1
= 130°C
c
200 A
8600 W
20 A
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STPS20120D
Table 4: Thermal Parameters
Symbol Parameter Value Unit
R
th(j-c)
Junction to case
2.2
°C/W
Table 5: Static Electrical Characteristics
Symbol Parameter Tests conditions Min. Typ Max. Unit
= 25°C
T
I
*
R
V
F
Pulse test: * tp = 5 ms, δ < 2%
To evaluate the conduction losses use the following equation: P = 0.56 x I
Reverse leakage current
**
Forward voltage drop
** tp = 380 µs,
δ < 2%
j
= 125°C
T
j
= 25°C
T
j
T
= 125°C
j
T
= 25°C
j
T
= 125°C
j
T
= 25°C
j
T
= 125°C
j
V
R
I
F
I
F
I
F
= V
= 5A
= 10A
= 20A
F(AV)
RRM
+ 0.010 I
310
0.54 0.58
0.62 0.66
0.72 0.76
F2(RMS)
20
0.7
0.8
0.93
µA
mA
V
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STPS20120D
Figure 1: Average forward power dissipation
versus average forward current
P (W)
F(AV)
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26
δ = 0.05
δ = 0.1
I (A)
F(AV)
δ = 0.2
δ = 0.5
=tp/T
δ
δ = 1
T
tp
Figure 3: Normalized avalanche power
derating versus pulse duration
P(t)
ARM p
P (1µs)
ARM
1
0.1
0.01
t (µs)
0.001
0.10.01 1
p
10 100 1000
Figure 2: Average forward current versus
ambient temperature (δ = 0.5)
I (A)
F(AV)
22
20
18
16
14
12
10
8
6
4
2
0
0 25 50 75 100 125 150 175
δ
=tp/T
T
tp
R=R
th(j-a) th(j-c)
R =15°C/W
th(j-a)
T (°C)
amb
Figure 4: Normalized avalanche power
derating versus junction temperature
P(t)
ARM p
P (25°C)
ARM
1.2
1
0.8
0.6
0.4
0.2
0
25 50 75 100 125 150
T (°C)
j
Figure 5: Non repetitive surge peak forward
current versus overload duration (maximum
values)
I (A)
M
140
120
100
80
60
40
IM
20
0
1.E-03 1.E-02 1.E-01 1.E+00
δ=0.5
t
t(s)
T =25°C
c
T =75°C
c
T =125°C
c
Figure 6: Relative variation of thermal
impedance junction to ambient versus pulse
duration
Z/R
th(j-c) th(j-c)
1.0
0.9
0.8
0.7
δ = 0.5
0.6
0.5
0.4
δ = 0.2
0.3
δ = 0.1
0.2
Single pulse
0.1
0.0
1.E-03 1.E-02 1.E-01 1.E+00
t (s)
p
δ
=tp/T
T
tp
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STPS20120D
Figure 7: Reverse leakage current versus
reverse voltage applied (typical values)
I (mA)
R
1.E+02
1.E+01
1.E+00
1.E-01
1.E-02
1.E-03
1.E-04
1.E-05
0 10 20 30 40 50 60 70 80 90 100 110 120
T =150°C
j
T =125°C
j
T =100°C
j
T =75°C
j
T =50°C
j
T =25°C
j
V (V)
R
Figure 9: Forward voltage drop versus forward
current
I (A)
FM
100
T =125°C
j
(maximum values)
T =125°C
j
(typical values)
10
T =25°C
j
(maximum values)
Figure 8: Junction capacitance versus reverse
voltage applied (typical values)
C(pF)
1000
100
V (V)
10
1 10 100
R
F=1MHz
V =30mV
OSC RMS
T =25°C
j
V (V)
1
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
FM
4/6
Figure 10: TO-220AC Package Mechanical Data
H2
L5
Ø I
L6
L2
L9
F1
L4
F
G
A
C
L7
D
M
E
STPS20120D
DIMENSIONS
REF.
A 4.40 4.60 0.173 0.181
C 1.23 1.32 0.048 0.051
D 2.40 2.72 0.094 0.107
E 0.49 0.70 0.019 0.027
F 0.61 0.88 0.024 0.034
F1 1.14 1.70 0.044 0.066
G 4.95 5.15 0.194 0.202
H2 10.00 10.40 0.393 0.409
L2 16.40 typ. 0.645 typ.
L4 13.00 14.00 0.511 0.551
L5 2.65 2.95 0.104 0.116
L6 15.25 15.75 0.600 0.620
L7 6.20 6.60 0.244 0.259
L9 3.50 3.93 0.137 0.154
M 2.6 typ. 0.102 typ.
Diam. I 3.75 3.85 0.147 0.151
Millimeters Inches
Min. Max. Min. Max.
Table 6: Ordering Information
Ordering type Marking Package Weight Base qty Delivery mode
STPS20120D STPS20120D TO-220AC 1.90 g 50 Tube
■ Epoxy meets UL94, V0
■ Cooling method: by conduction (C)
■ Recommended torque value: 0.55 m.N.
■ Maximum torque value: 0.70 m.N.
Table 7: Revision History
Date Revision Description of Changes
18-Feb-2005 1 First issue.
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STPS20120D
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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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