April 2017
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This is information on a product in full production.
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STPS40SM120C
Power Schottky rectifier
Datasheet - production data
Features
High current capability
Avalanche rated
Low forward voltage drop current
High frequency operation
ECOPACK®2 compliant component on
TO-220AB
Description
This Schottky rectifier is suited for high frequency
switch mode power supply.
The voltage drop versus leakage current trade-off
is in keeping with medium power hi-density
adapter design.
Packaged in TO-220AB narrow leads, TO-220AB
and I²PAK, this device is intended to be used in
notebook, game station and desktop adaptors,
providing in these applications a good efficiency
at both low and high load.
Table 1: Device summary
Symbol
Value
IF(AV)
2 x 20 A
VRRM
120 V
Tj(max.)
150 °C
VF(typ.)
0.46 V
Figure 1: Electrical characteristics
VARM and IARM must respect the reverse safe
operating area defined in Figure 9. VAR and
IAR are pulse measurements (tp < 1 μs). VR,
IR, VRRM and VF, are static characteristics.
K
A1
A2
A1
A2
K
TO-220AB
I²PAK KA2
A1
TO-220AB
narrow leads
KA2
A1
Characteristics
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1 Characteristics
Table 2: Absolute ratings (per diode, limiting values at 25 °C, unless otherwise specified)
Symbol
Parameter
Value
Unit
VRRM
Repetitive peak reverse voltage
120
V
IF(RMS)
Forward rms current
30
A
IF(AV)
Average forward current
δ = 0.5, square wave
Per diode, TC = 125 °C
20
A
Per device, TC = 115 °C
40
IFSM
Surge non repetitive forward
current
tp = 10 ms sine-wave
210
A
PARM(1)
Repetitive peak avalanche
power
tp = 10 µs, Tj = 125 °C
1150
W
VARM(2)
Maximum repetitive peak
avalanche voltage
tp < 10 μs, Tj < 125 °C, IAR < 7.7 A
150
V
VASM
Maximum single pulse peak
avalanche voltage
Tstg
Storage temperature range
-65 to +175
°C
Tj
Maximum operating junction temperature (3)
150
°C
Notes:
(1)For pulse time duration deratings, please refer to figure 4. More details regarding the avalanche energy
measurements and diode validation in the avalanche are provided in the application notes AN1768 and AN2025.
(2)See Figure 9
(3)(dPtot/dTj) < (1/Rth(j-a)) condition to avoid thermal runaway for a diode on its own heatsink.
Table 3: Thermal parameters
Symbol
Parameter
Max. value
Unit
Rth(j-c)
Junction to case
Per diode
1.35
°C/W
Total
0.93
Rth(c)
Coupling
0.50
When the two diodes 1 and 2 are used simultaneously:
ΔTj(diode 1) = P(diode 1) x Rth(j-c)(Per diode) + P(diode 2) x Rth(c)
STPS40SM120C
Characteristics
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Table 4: Static electrical characteristics (values per diode)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
IR(1)
Reverse leakage current
Tj = 25 °C
VR = VRRM
-
55
275
µA
Tj = 125 °C
-
20
50
mA
VF(2)
Forward voltage drop
Tj = 125 °C
IF = 5 A
-
0.46
0.51
V
Tj = 125 °C
IF = 10 A
-
0.55
0.60
Tj = 25 °C
IF = 20 A
-
0.83
Tj = 125 °C
-
0.63
0.69
Notes:
(1)Pulse test: tp = 5 ms, δ < 2%
(2)Pulse test: tp = 380 µs, δ < 2%
To evaluate the conduction losses, use the following equation:
P = 0.52 x IF(AV) + 0.0085 x IF2(RMS)
Characteristics
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1.1 Characteristics (curves)
Figure 2: Average forward power dissipation
versus average forward current (per diode)
Figure 3: Average forward current versus ambient
temperature (δ = 0.5, per diode)
Figure 4: Normalized avalanche power derating
versus pulse duration (per diode)
Figure 5: Relative variation of thermal impedance
junction to case versus pulse duration (per diode)
Figure 6: Reverse leakage current versus reverse
voltage applied (typical values, per diode)
Figure 7: Junction capacitance versus reverse
voltage applied (typical values, per diode)
0
4
8
12
16
20
0 4 8 12 16 20 24 28
P (W)
F(AV)
δ= 1
δ= 0.5
δ= 0.2
δ= 0.1
δ= 0.05
T
δ= t / T
ptpI (A)
F(AV)
0
4
8
12
16
20
24
0 25 50 75 100 125 150
I (A)
F(AV)
Rth(j-a) = Rth(j-c)
T (°C)
am b
P (tp)
P (10 µs)
ARM
ARM
0.001
0.01
0.1
1
1 10 100 1000
t (µs)
p
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.E-04 1.E-03 1.E-02 1.E-01 1.E+00
Z /R
th(j-c) th(j-c)
Single pulse
t (s)
p
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0 10 20 30 40 50 60 70 80 90 100 110 120
Tj=150°C
Tj=125°C
Tj=25°C
Tj=100°C
Tj=75°C
Tj=50°C
I (mA)
R
V (V)
R
100
1000
10000
1 10 100 1000
F=1MHz
Vosc=30mVRMS
Tj=25°C
C(pF)
V (V)
R
STPS40SM120C
Characteristics
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Figure 8: Forward voltage drop versus forward
current (per diode)
Figure 9: Reverse safe operating area
(tp < 1 µs and Tj < 150 °C, per diode)
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
120 130 140 150 160 170
I (A)
arm
V (V)
arm
Package information
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2 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Cooling method: by conduction (C)
Epoxy meets UL 94,V0
Recommended torque value: 0.55 N·m (for TO-220AB)
Maximum torque value: 0.7 N·m (for TO-220AB)
2.1 TO-220AB narrow leads package information
Figure 10: TO-220AB narrow leads package outline
STPS40SM120C
Package information
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Table 5: TO-220AB narrow leads package mechanical data
Ref.
Dimensions
Millimeters
Inches
Min.
Max.
Min.
Max.
A
4.40
4.60
0.17
0.18
b
0.61
0.88
0.024
0.034
b1
0.95
1.20
0.037
0.047
c
0.48
0.70
0.019
0.027
D
15.25
15.75
0.060
0.062
D1
1.27 typ.
0.05 typ.
E
10.00
10.40
0.39
0.41
e
2.40
2.70
0.094
0.106
e1
4.95
5.15
0.19
0.20
F
1.23
1.32
0.048
0.052
H1
6.20
6.60
0.24
0.26
J1
2.40
2.72
0.095
0.107
L
13.00
14.00
0.51
0.55
L1
2.60
2.90
0.102
0.114
L20
15.40 typ.
0.61
L30
28.90 typ.
1.14
ØP
3.75
3.85
0.147
0.151
Q
2.65
2.95
0.104
0.116
Package information
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2.2 TO-220AB package information
Figure 11: TO-220AB package outline
STPS40SM120C
Package information
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Table 6: TO-220AB package mechanical data
Ref.
Dimensions
Millimeters
Inches(1)
Min.
Max.
Min.
Max.
A
4.40
4.60
0.1732
0.1811
b
0.61
0.88
0.0240
0.0346
b1
1.14
1.70
0.0449
0.0669
c
0.48
0.70
0.0189
0.0276
D
15.25
15.75
0.6004
0.6201
D1
1.27 typ.
0.0500 typ.
E
10.00
10.40
0.3937
0.4094
e
2.40
2.70
0.0945
0.1063
e1
4.95
5.15
0.1949
0.2028
F
1.23
1.32
0.0484
0.0520
H1
6.20
6.60
0.2441
0.2598
J1
2.40
2.72
0.0945
0.1071
L
13.00
14.00
0.5118
0.5512
L1
3.50
3.93
0.1378
0.1547
L20
16.40 typ.
0.6457 typ.
L30
28.90 typ.
1.1378 typ.
ØP
3.75
3.85
0.1476
0.1516
Q
2.65
2.95
0.1043
0.1161
Notes:
(1)Inch dimensions are for reference only.
Package information
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2.3 I²PAK package information
Figure 12: I²PAK package outline
Table 7: I²PAK package mechanical data
Ref.
Dimensions
Millimeters
Inches
Min.
Max.
Min.
Max.
A
4.40
4.60
0.173
0.181
A1
2.40
2.72
0.094
0.107
b
0.61
0.88
0.024
0.035
b1
1.14
1.70
0.044
0.067
c
0.49
0.70
0.019
0.028
c2
1.23
1.32
0.048
0.052
D
8.95
9.35
0.352
0.368
e
2.40
2.70
0.094
0.106
e1
4.95
5.15
0.195
0.203
E
10.00
10.40
0.394
0.409
L
13.00
14.00
0.512
0.551
L1
3.50
3.93
0.138
0.155
L2
1.27
1.40
0.050
0.055
STPS40SM120C
Ordering information
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3 Ordering information
Table 8: Ordering information
Order code
Marking
Package
Weight
Base
qty.
Delivery
mode
STPS40SM120CR
PS40SM120CR
I²PAK
1.49 g
50
Tube
STPS40SM120CTN
PS40SM120CTN
TO-220AB
narrow leads
1.9 g
50
Tube
STPS40SM120CT
PS40SM120CT
TO-220AB
2.2 g
50
Tube
4 Revision history
Table 9: Document revision history
Date
Revision
Changes
02-Apr-2012
1
First issue.
04-Nov-2014
2
Added TO-220AB and TO-220FPAB package information.
11-Apr-2017
3
Updated Section 1: "Characteristics" and Section 1.1:
"Characteristics (curves)".
STPS40SM120C
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