Diodes SDM20U40 User Manual

Features

 Low Forward Voltage Drop

 Guard Ring Construction for Transient Protection

 Negligible Reverse Recovery Time

 Low Reverse Capacitance

 Ultra-Small Surface Mount Package

 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

 Qualified to AEC-Q101 Standards for High Reliability

Top View

SDM20U40

SURFACE MOUNT SCHOTTKY BARRIER DIODE

Mechanical Data

 Case: SOD523

 Case Material: Molded Plastic, "Green" Molding Compound. UL

Flammability Classification Rating 94V-0

 Moisture Sensitivity: Level 1 per J-STD-020

 Terminals: Lead Free Plating (Matte Tin Finish). Solderable per

MIL-STD-202, Method 208

 Polarity: Cathode Band

 Weight: 0.002 grams (approximate)

Ordering Information (Note 4)

Device Packaging Shipping

SDM20U40-7 (Note 5) SOD523 3,000/Tape & Reel

SDM20U40-13 (Note 6) SOD523 10,000/Tape & Reel

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.

4. For packaging details, go to our website at http”//www.diodes.com/products/packages.html

5. Dispensed in every other cavity of the tape.

6. Dispensed in every cavity of the tape.

Marking Information

SDM20U40

Document number: DS30393 Rev. 10 - 2

S4

1 of 4

www.diodes.com

S4 = Product Type Marking Code

May 2013

© Diodes Incorporated

)



(BR)

N

TAN

T

N

O

U

O

R

R

C

URREN

T

Maximum Ratings (@T

= +25°C, unless otherwise specified.)

A

Characteristic Symbol Value Unit

Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage

RMS Reverse Voltage
Forward Continuous Current (Note 7)
Non-Repetitive Peak Forward Surge Current @ t  1.0s

Thermal Characteristics

Characteristic Symbol Value Unit

Power Dissipation (Note 7)
Thermal Resistance, Junction to Ambient Air (Note 7)
Operating and Storage Temperature Range

V

T

V

RRM

V

RWM

V

R

R(RMS

I

FM

I

FSM

P

D

R

JA

, T

J

STG

SDM20U40

40 V

28 V

250 mA

1.0 A

150 mW
667

-65 to +125

C/W

C

Electrical Characteristics (@T

= +25°C, unless otherwise specified.)

A

Characteristic Symbol Min Typ Max Unit Test Conditions

Reverse Breakdown Voltage (Note 8)

Forward Voltage Drop

Peak Reverse Current (Note 8)

Total Capacitance

Reverse Recovery Time

Notes: 7. Device mounted on FR-4 board with recommended pad layout, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.

8. Short duration pulse test used so as to minimize self-heating effect.

V

V

F

I

R

C

T

t

rr

40

R

 

 





 

0.35

0.37

0.60

5
1

50

10





V

IR = 10µA

= 10mA

I

F

V

I

= 20mA

F

I

= 200mA

F

= 30V

V

µA

R

µA

pF

ns

= 10V

V

R

VR = 0V, f = 1.0MHz

= IR = 200mA,

I

F

I

= 0.1 x IR, RL = 100

rr

1,000

(mA)

100

T = 125°C

10

A

T = 75°C

1

A

D

WA

S F

T = 25°C

E

0.1

A

1,000

100

10

0.1

T = 125°C

A

T = 75°C

A

1

T = 25°C

A

A

T = -25°C

A

20

30

40

S

I, I

F

0.01

T = -25°C

A

0.001
0

V , INSTANTANEOUS FORWARD VOLTAGE (mV)

F

200

400

Figure 1 Typical Forward Characteristi cs

600

800

I , INSTANTANEOUS REVERSE CURRENT (µA)

R

0.01

0.001
1

V , INSTANTANEOUS REVERSE VOLTAGE (V)

R

10

Figure 2 Typical Reverse Characteristics

SDM20U40

Document number: DS30393 Rev. 10 - 2

2 of 4

www.diodes.com

May 2013

© Diodes Incorporated

C

, TOT

CAPACITANC

p

F

)

P, P

O

R

PAT

O

N

100

E (

10

AL

1.0

T

0.1
010203040

V , DC REVERSE VOLTAGE (V)

Figure 3 Total Capacitance vs. Reverse Voltage

R

f = 1MHz

200

150

(mW)

I

100

DISSI

WE

50

D

0

025

50

T , AMBIENT TEMPERATURE ( C)

A

Figure 4 Power Derating Curve

75

SDM20U40

Note 7

100

°

125

Package Outline Dimensions

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

H

C

A

B

L

SOD523

Dim Min Max

A 0.25 0.35
B 0.70 0.90
C 1.50 1.70
H 1.10 1.30
K 0.55 0.65
L 0.10 0.30
M 0.10 0.12

M

K

All Dimensions in mm

Suggested Pad Layout

Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.

C

SDM20U40

Document number: DS30393 Rev. 10 - 2

X

GY

Z

3 of 4

www.diodes.com

Dimensions Value (in mm)

Z 2.3
G 1.1
X 0.8
Y
C

0.6

1.7

May 2013

© Diodes Incorporated

IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the

labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.

Copyright © 2013, Diodes Incorporated

www.diodes.com

SDM20U40

SDM20U40

Document number: DS30393 Rev. 10 - 2

4 of 4

www.diodes.com

May 2013

© Diodes Incorporated