This is information on a product in full production.
November 2014 DocID022921 Rev 2 1/14
STPS20SM120S
Power Schottky rec t ifier
Datasheet - production data
Features
•High curren t capability
•Avalanche rated
•Low forward voltage drop
•High freque ncy operation
•Insulated pac kage TO 220F P-A B:
– Insulated v oltage: 2000 VRMS sine
•ECOPACK®2 compli ant component on
TO-220 AB and TO -2 20FPAB.
Description
This Schott ky diode is suited for high frequency
switch mode power supply.
Packaged in TO-220AB narrow leads, T O-220AB,
TO-220FPAB and I2PAK, this device is intended
to be used in notebook, game station and desktop
adapte rs, providing in these applications a good
efficiency at both low and high load.
Figure 1. Electrical characteristics(a)
.
$
$
$
$
$
$
.
.
72)3$% 72$%
,ð3$.
.$
$
72$%
QDUURZOHDGV
.$
$
.
.
.
Table 1. Device summary
Symbol Value
IF(AV) 20 A
VRRM 120 V
Tj150 °C
VF (typ) 0.49 V
a. VARM and IARM must respect the reverse safe
operating ar ea defined in Figure 9. VAR and IAR ar e
pulse me asurements (tp < 10 µs). VR, IR, VRRM and
VF, are static ch arac t e ristic s
IF
2 x IO
IO
IR
IAR
VF(Io)
VTo VF(2xIo)
VF
V
I
I
V
VR
VRRM
"Reverse"
"Forward"
VAR
X
X
www.st.com
Characteristics STPS20SM120S
2/14 DocID022921 Rev 2
1 Characteristics
To evaluate the conduction losses use the following equation:
P = 0.56 x IF(AV) + 0.008 x IF2(RMS)
Table 2. Absolute ratings (limiting values wit h terminals 1 and 3 short circuited at Tamb = 25 °C,
unless other wise specifie d)
Symbol Parameter Value Unit
VRRM Repetitive peak reverse voltage 120 V
IF(RMS) For ward rms current 50 A
IF(AV) Average for ward current 20 A
IFSM Surge non repetitive forward current tp = 10 ms sine-wave 220 A
PARM(1) Repetit ive peak avalanche pow er Tj = 125 °C, tp = 10 µs 900 W
VARM(2) Maximum repetitive peak avalanche voltage tp < 1 0 µs, T j < 125 °C, IAR < 6A 150 V
VASM(2) Maximum single-pulse peak avalanche voltage tp < 1 0 µs , T j < 125 °C, IAR < 6A 150 V
Tstg Storage tem perature range -65 to +175 °C
TjMaximum operating junction temperature (3) 150 °C
1. For pulse time duration deratings, please refer to Figure 4. More details re garding the avalanche energy meas urements
and diode validation in the avalanche are provided in the STMicroelectronics Application notes AN1768, “Admissible
avalanche power of Schottky di odes” and AN2025, “Converter improvement usin g Schottky rectifier avalanche
specification”.
2. See Figure 9
3. condition to avoid thermal runaway for a diode on its own heatsink
dPtot
dTj <1
Rth(j-a)
Table 3. Thermal resist ance
Symbol Parameter Value Unit
Rth(j-c) Junction to case TO -220AB and TO-220AB narr ow leads 1.55 °C/W
TO-220FPAB 4
Tabl e 4. Static electrical character istics (termin als 1 and 3 short circuited)
Symbol Parameter Test conditions Min. Typ. Max. Unit
IR(1) Reverse leakage current Tj = 25 °C VR = VRRM - 40 210 µA
Tj = 125 °C - 15 40 mA
VF(2) Forward vol tage drop
Tj = 125 °C IF = 5 A - 0.49 0.54
V
Tj = 25 °C IF = 10 A -0.75
Tj = 125 °C - 0.57 0.62
Tj = 25 °C IF = 20 A - 0.89
Tj = 125 °C - 0.65 0.72
1. Pulse test: tp = 5 ms, δ < 2%
2. Pulse test: tp = 380 µs , δ < 2%
DocID022921 Rev 2 3/14
STPS20SM120S Characteristics
14
Figure 2. Average forward power dissipation
versus averag e forward cu rren t Figure 3. Average forward current versus
ambient temperature (δ = 0. 5)
P(W)
F(AV)
0
4
8
12
16
20
24
0 4 8 1216202428
T
δ= t / T
ptpI(A)
F(AV)
δ= 1
δ= 0.5
δ= 0.2
δ= 0.1
δ= 0.05
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)
amb
T
δ= t / T
ptp
Figure 4. Normaliz ed avalan che po wer
derating versu s pulse durati on F igure 5. Relative variation of thermal
impedance junction to case versus
pulse du ra ti on
W3V



  
3$50W33$50V
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
Figure 6. Reverse leakage current versus
reverse vol tage applied
(typical values)
Figure 7. Junction cap acit an ce versus
reverse voltage applied
(typical values )
I (mA)
R
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0 102030405060708090100110120
Tj°C
=150
Tj=25°C
Tj=100°C
Tj=75°C
Tj=50°C
Tj=150°C
V(V)
R
100
1000
1 10 100 1000
F=1MHz
Vosc=30mVRMS
Tj=25°C
C(pF)
V(V)
R
Characteristics STPS20SM120S
4/14 DocID022921 Rev 2
Figure 8. Forward voltage drop versus
forward current Figure 9. Reverse safe operating area
(tp < 10 µs and Tj < 125 °C)
I (A)
arm
5.0
5.5
6.0
6.5
7.0
7.5
8.0
120 130 140 150 160 170
V (V)
arm
V (V)
arm
DocID022921 Rev 2 5/14
STPS 20SM120S Packag e inform ation
14
2 Package information
•Epoxy meets UL94, V0
•Cooling metho d: by conduction (C)
•Recomm ended t orque value for TO-220AB and TO-220FPAB : 0.4 N·m to 0.6 N·m
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPA CK ®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an S T trademark .
Fi gure 10. TO-2 20AB narrow leads dimensio n defini t i ons
(
3
4
/
/
/
E[
E[
H
/
H

)
''
+
$
-
&
Pack age information STPS20S M1 20S
6/14 DocID022921 Rev 2
Table 5. TO-220AB narrow leads dimension values
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. 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 0.60 0.62
D1 1.27 0.05
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 0.61
L30 28.90 1.14
∅P 3.75 3.85 0.147 0.151
Q 2.65 2.95 0.104 0.116
DocID022921 Rev 2 7/14
STPS 20SM120S Packag e inform ation
14
Figu re 11. TO-2 20 AB di m ensio n de fi ni t io ns
$
)
'
-
+
3
4
'
/
/
E
(
H
H
/ /
E
F
5HVLQJDWH
PPPD[
SURWUXVLRQ
5HVLQJDWH
PPPD[
SURWUXVLRQ
5HVLQJDWHSRVLWLRQDFFHSWHGLQHDFKRIWKHWZR
SRVLWLRQVKRZQDVZHOODVWKHV\PPHWULFDORSSRVLWHV
Pack age information STPS20S M1 20S
8/14 DocID022921 Rev 2
Table 6. TO-220A B dimension value s
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.4 0 4.6 0 0.1 7 0.18 1
b 0.61 0.88 0.024 0.035
b1 1.14 1.50 0.045 0.059
c 0.48 0.70 0.019 0.027
D 15.25 15.75 0.60 0.62
D1 1.27 typ. 0.05 typ.
E 10 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 0.094 0.107
L 13 14 0.51 0.55
L1 3.50 3.93 0.137 0.154
L20 16.40 typ. 0.64 typ.
L30 28.90 typ. 1.13 typ.
∅P 3.75 3.85 0.147 0.151
Q 2.65 2.95 0.104 0.116
DocID022921 Rev 2 9/14
STPS 20SM120S Packag e inform ation
14
Figure 12. TO-220FPAB dimension definitions
+
$
%
'LD
/
/
/
)
)
)
'
(
/
*
*
/
/
Pack age information STPS20S M1 20S
10/14 DocID022921 Rev 2
Table 7. TO-220FPAB dimension values
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.4 4.6 0.173 0.181
B 2.5 2.7 0.098 0.106
D 2.5 2.75 0.098 0.108
E 0.45 0.70 0.018 0.027
F 0.75 1 0.030 0.039
F1 1.15 1.70 0.045 0.067
F2 1.15 1.70 0.045 0.067
G 4.95 5.20 0.195 0.205
G1 2.4 2.7 0.094 0.106
H 10 10.4 0.393 0.409
L2 16 Typ. 0.63 Typ.
L3 28.6 30.6 1.126 1.205
L4 9.8 10.6 0.386 0.417
L5 2.9 3.6 0.114 0.142
L6 15.9 16.4 0.626 0.646
L7 9.00 9.30 0.354 0.366
Dia. 3.00 3.20 0.118 0.126
DocID022921 Rev 2 11/14
STPS 20SM120S Packag e inform ation
14
Figu re 13 . I²PAK di m ensio n de fi ni t io ns
(
/
/
E
'
$
F
F
$
E
H
H
/
Pack age information STPS20S M1 20S
12/14 DocID022921 Rev 2
Table 8. I²PAK dim en sion values
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 10.40 0.394 0.409
L 13 14 0.512 0.551
L1 3.50 3.93 0.138 0.155
L2 1.27 1.40 0.050 0.055
DocID022921 Rev 2 13/14
STPS 20SM120S Order ing inform ati on
14
3 Ordering information
4 Revision history
Table 9. Ordering information
Order code Marking Package Weight Base qty Delivery mode
STPS20SM120SR PS20SM120SR I2PAK 1.49 g 50 Tube
STPS20SM120STN PS20SM120STN TO-220AB
narrow leads 1.9 g 50 Tube
STPS20SM120 ST PS20SM120ST TO -220AB 2.2 g 50 Tube
STPS20SM 120SFP PS20SM120SFP TO-220FPAB 1.7 g 50 Tube
Tabl e 10. Documen t revision history
Date Revision Changes
02-Apr-2012 1 First issue.
13-Nov-2014 2 Added TO-220AB and TO-220FPAB package information.
STPS20SM120S
14/14 DocID022921 Rev 2
IMP ORTANT NOTICE – PL EA SE REA D CAREFULLY
STM i croelectroni cs NV and its subsidi aries (“S T”) reser ve the ri ght t o m ake ch anges , c orrec ti ons , enhan cements, m odi fic ations , and
improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
ST produc ts before pl acing orders. S T produc ts are sold purs uant to ST ’s te rm s and c onditions of sale i n pl ace at the t i m e of order
acknowledgement.
Purchasers are solely responsible for the choice, sele ction, and use of ST product s and S T assumes no liability for appli cation assistance or
the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST pr oducts wi th pr ovisions differen t f rom the info rm ation set forth herei n sha l l v oi d any w arrant y gra nted by ST for such product.
ST and the ST l ogo are tradem arks of S T. All othe r product or serv i ce names ar e the pro pert y of their resp ectiv e owne rs.
Info rm ation in th i s document su persedes and replaces information prev i ously suppli ed in any prior versi ons of t hi s docum ent.
© 2014 STMicroelectronics – All rights reserved