Datasheet STPS40120C Datasheet (ST)

Features

■ High junction temperature capability

■ Avalanche rated

■ Low leakage current

■ Good trade-off between leakage current and

forward voltage drop

STPS40120C

Power Schottky rectifier

A1

A2

K

K

K

Description

Dual center tap Schottky rectifier suited for high
frequency Switch Mode Power Supply.

Packaged in TO-220AB, TO-220AB narrow leads

2

and I

PAK, this device is intended to be used in
notebook and 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.

A2

K

A1

TO-220AB

STPS40120CT

K

A1

TO-220AB narrow leads

STPS40120CTN

Table 1. Device summary

I

F(AV)

120 V

V

RRM

T

j(max)

0.57 V

V

F(typ)

K

A1

I2PAK

STPS40120CR

A2

K

2 x 20 A

175 °C

A2

September 2011 Doc ID 11214 Rev 3 1/9

www.st.com

9

Characteristics STPS40120C

d

-

1 Characteristics

Table 2. Absolute ratings (limiting values, per diode)

Symbol Parameter Value Unit

V

RRM

I

F(RMS)

I

F(AV)

I

FSM

P

ARM

T

stg

T

Ptot

--------------

1. condition to avoid runaway for a diode on its own heatsink

dTj

Table 3. Thermal parameters

Repetitive peak reverse voltage 120 V

Forward rms current 30 A

Average forward
current

δ = 0.5

= 145 °C

T

c

Per diode
Per device

Surge non repetitive forward current tp = 10 ms sinusoidal 200 A

Repetitive peak avalanche power tp = 1 µs, Tj = 25 °C 10500 W

Storage temperature range -65 to + 175 °C

Maximum operating junction temperature

j

1

--------------------------

<

Rth j a–()

(1)

175 °C

20
40

Symbol Parameter Value Unit

R

R

th(j-c)

th(c)

Junction to case

Per diode
To ta l

Coupling Total 0.1 °C/W

1.6

0.85

When the diodes 1 and 2 are used simultaneously:
ΔT

(diode 1) = P(diode 1) x R

j

Table 4. Static electrical characteristics (per diode)

(per diode) + P(diode 2) x R

th(j-c)

th(c)

A

°C/W

Symbol Test conditions Min. Typ. Max. Unit

T

= 25 °C

(1)

I

Reverse leakage current

R

j

T

= 125 °C 4 12 mA

j

Tj = 25 °C

T

= 125 °C 0.57 0.61

j

T

= 25 °C

(2)

V

1. Pulse test: tp = 5 ms, δ < 2%

2. Pulse test: tp = 380 µs, δ < 2%

Forward voltage drop

F

j

= 125 °C 0.69 0.73

T

j

T

= 25 °C

j

= 125 °C 0.83 0.88

T

j

To evaluate the maximum conduction losses use the following equation:
P = 0.58 x I

2/9 Doc ID 11214 Rev 3

F(AV)

+ 0.0075 I

F2(RMS)

= V

V

R

RRM

= 7.5 A

I

F

I

= 20 A

F

IF = 40 A

25 μA

0.73

0.9
V

1

STPS40120C Characteristics

Figure 1. Average forward power

dissipation versus average
forward current (per diode)

P (W)

F(AV)

20

18

16

14

12

10

8

6

4

2

0

0 2 4 6 8 1012141618202224

δ = 0.05

δ = 0.1

δ = 0.2

I (A)

F(AV)

δ = 0.5

δ

=tp/T

Figure 3. Normalized avalanche power

derating versus pulse duration

P(tp)

ARM

P (1 µs)

ARM

1

0.1

0.01

t (µs)

0.001

0.10.01 1

p

10 100 1000

T

δ = 1

Figure 2. Average forward current versus

ambient temperature
(

δ = 0.5, per diode)

I (A)

F(AV)

22

20

18

16

14

12

10

8

6

4

tp

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(Tj)

ARM

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, per diode)

I (A)

M

240

220

200

180

160

140

120

100

80

60

IM

40

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

Doc ID 11214 Rev 3 3/9

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

Characteristics STPS40120C

Figure 7. Reverse leakage current versus

1.E+02

1.E+01

1.E+00

1.E-01

1.E-02

1.E-03

1.E-04

1.E-05

reverse voltage applied (typical
values, per diode)

I (mA)

R

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

0 10 20 30 40 50 60 70 80 90 100 110 120

Figure 8. Junction capacitance versus

reverse voltage applied (typical
values, per diode)

C(pF)

1000

100

10

1 10 100

Figure 9. Forward voltage drop versus forward current (per diode)

I (A)

FM

100

10

T=125°C

j

(maximum values)

T=125°C

j

(typical values)

T=25°C

j

(maximum values)

V (V)

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

FM

4/9 Doc ID 11214 Rev 3

STPS40120C Package information

2 Package information

● Epoxy meets UL94, V0

● Cooling method: by conduction (C)

● Recommended torque value: 0.4 to 0.6 N·m

In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK

Figure 10. TO-220AB dimensions

®

packages, depending on their level of environmental compliance. ECOPACK®

®

is an ST trademark.

Dimensions

Ref.

Millimeters Inches

Min. Max. Min. Max.

A 4.40 4.60 0.173 0.181

C 1.23 1.32 0.048 0.051

H2

Dia

L5

L6

L2

F2

F1

F

G1

L9

L4

G

A

C

L7

D

M

E

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

F2 1.14 1.70 0.044 0.066

G 4.95 5.15 0.194 0.202

G1 2.40 2.70 0.094 0.106

H2 10 10.40 0.393 0.409

L2 16.4 typ. 0.645 typ.

L4 13 14 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. 3.75 3.85 0.147 0.151

Doc ID 11214 Rev 3 5/9

Package information STPS40120C

Table 5. TO-220AB narrow leads dimensions

Dimensions

L20

b1(x3)

1

E

23

e

e1

Q

L1

b (x3)

Ref.

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 4.40 4.60 0.17 0.18

P

A

F

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

H1

D

D1

D 15.25 15.75 0.60 0.62

D1 1.27 0.05

E 10.00 10.40 0.39 0.41

L30

e 2.40 2.70 0.094 0.106

e1 4.95 5.15 0.19 0.20

L

J1

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

C

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

6/9 Doc ID 11214 Rev 3

STPS40120C Package information

Devices in I2PAK with nickel-plated back frame must NOT be mounted by frame soldering
like SMDs. Such devices are intended to be through-hole mounted ONLY and in no
circumstances shall ST be held liable for any lack of performance or damage arising out of
soldering of nickel-plated back frames.

Table 6. I2PAK dimensions

Dimensions

L2

Ref.

Millimeters Inches

Min. Max. Min. Max.

A

E

c2

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

D

c 0.49 0.70 0.019 0.028

c2 1.23 1.32 0.048 0.052

L1

L

b1

A1

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

b

e

e1

c

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

Doc ID 11214 Rev 3 7/9

Ordering information STPS40120C

3 Ordering information

Table 7. Ordering information

Order code Marking Package Weight Base qty Delivery mode

STPS40120CT STPS40120CT TO-220AB 2.2 g 50 Tube

STPS40120CR STPS40120CR I2PAK 1.49 g 50 Tube

STPS40120CTN PS40120CTN

TO-220AB

narrow leads

1.9 g 50 Tube

4 Revision history

Table 8. Document revision history

Date Revision Changes

18-Feb-2005 1 First issue

1-Dec-2006 2 Reformatted to current standards. Added I2PAK.

15-Sep-2011 3 Added TO-220AB narrow leads package.

8/9 Doc ID 11214 Rev 3

STPS40120C

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Doc ID 11214 Rev 3 9/9