SDM03MT40/A
SURFACE MOUNT SCHOTTKY BARRIER DIODE
Features
• Low Forward Voltage Drop
• Guard Ring Die Construction for Transient Protection
• Ideal for low logic level applications
• Low Capacitance
• Lead Free/RoHS Compliant (Note 3)
• "Green" Device, Note 4 and 5
Mechanical Data
• Case: SOT-26
• Case Material: Molded Plastic, "Green" Molding Compound,
Note 5. UL Flammability Classification Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020D
• Polarity: See Diagram
• Leads: Matte Tin (Lead Free), Solderable per MIL-STD-202,
Method 208
• Lead Free Plating (Matte Tin Finish annealed over Copper
leadframe).
• Marking Information: See Page 3
• Ordering Information: See Page 3
• Weight: 0.016 grams (approximate)
SDM03MT40A
Top View SDM03MT40
Device Schematic
Device Schematic
Maximum Ratings @TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
VRRM
VRWM
VR
40 V
RMS Reverse Voltage VR(RMS) 28 V
Forward Continuous Current (Note 2) IFM 30 mA
Non-Repetitive Peak Forward Surge Current @8.3ms
Single half sine-wave superimposed on rated load
(JEDEDC method)
IFSM 200 mA
Thermal Characteristics
Characteristic Symbol Value Unit
Power Dissipation (Note 2) PD 225 mW
Thermal Resistance, Junction to Ambient Air RθJA 444 °C/W
Operating and Storage Temperature Range TJ, TSTG -40 to +125 °C
Electrical Characteristics @TA = 25°C unless otherwise specified
Characteristic Symbol Min Typ Max Unit Test Condition
Reverse Breakdown Voltage (Note 1) V(BR)R 40 ⎯ ⎯ V IR = 10uA
Forward Voltage Drop (Note 1) VF ⎯ ⎯ 370 mV IF = 1mA
Leakage Current (Note 1) IR ⎯ ⎯ 1 μA VR = 10V
Total Capacitance CT ⎯ 2 ⎯ pF VR = 1V f = 1.0 MHz
Notes: 1. Short duration pulse test used to minimize self-heating effect.
2. Device mounted on FR-4 PC board with recommended pad layout, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
3. No purposefully added lead.
4. Diodes Inc.'s "Green" policy can be found on our website at http://www.diodes.com/products/lead_free/index.php.
5. Product manufactured with Date Code 0627 (week 27, 2006) and newer are built with Green Molding Compound. Product manufactured prior to Date
Code 0627 are built with Non-Green Molding Compound and may contain Halogens or Sb2O3 Fire Retardants.
6. Package is non-polarized. Parts may be on reel in orientation illustrated, 180° rotated, or mixed (both ways).
SDM03MT40/A
Document number: DS30372 Rev. 11 - 2
1 of 3
www.diodes.com
July 2008
© Diodes Incorporated
SDM03MT40/A
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
I, I
N
S
T
A
N
T
A
N
E
O
U
S
F
O
R
WA
R
D
C
U
R
R
E
N
T
(A)
F
V , INSTANTANEOUS FORWARD VOLTAGE (V)
Fig. 1 Typical Forward Characteristics
F
100m
1m
10m
1
051015
20 25 30 35
I, I
N
S
T
A
N
T
A
N
E
O
U
S
R
EVE
R
SE
C
U
R
R
E
N
T
(A)
R
V , INSTANTANEOUS REVERSE VOLTAGE (V)
Fig. 2 Typical Reverse Characteristics
R
100n
10n
1n
0.1
1
10
100
0510 15 20 25
C
,
T
O
T
AL
C
A
P
A
C
I
T
A
N
C
E (pF)
T
V , DC REVERSE VOLTAGE (V)
Fig. 3 Total Capacitance vs. Reverse Voltage
R
0.1
0.2
0.5
1
5
2
10
04812 16 20 24 28
t,
R
EVE
R
SE
R
E
C
O
VE
R
Y
T
I
M
E (ns)
rr
I , FORWARD CURRENT (mA)
Fig. 4 Typical Reverse Recovery Time Characteristics
F
0
75
025 50 75 100 125
P
,
P
O
WE
R
DISSI
P
A
T
I
O
N (mW)
D
T , AMBIENT TEMPERATURE ( C)
Fig. 5 Power Derating Curve
A
°
150
300
225
SDM03MT40/A
Document number: DS30372 Rev. 11 - 2
2 of 3
www.diodes.com
July 2008
© Diodes Incorporated
SDM03MT40/A
Ordering Information (Notes 4 & 7)
Part Number
SDM03MT40/A
Document number: DS30372 Rev. 11 - 2
3 of 3
www.diodes.com
July 2008
© Diodes Incorporated
Case Packaging
SDM03MT40-7-F SOT-26 3000/Tape & Reel
SDM03MT40A-7-F SOT-26 3000/Tape & Reel
Notes: 7. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
KSR
YM
KSK = SDM03MT40A Product Type
Marking Code (See Note 6)
YM = Date Code Marking
Y =Year ex: T = 2006
M = Month ex: 9 = September
KSR = SDM03MT40 Product Type
Marking Code (See Note 6)
YM = Date Code Marking
Y = Year ex: T = 2006
M = Month ex: 9 = September
KSK
YM
Date Code Key
Year 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
Code T U V W X Y Z A B C
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Code 1 2 3 4 5 6 7 8 9 O N D
Package Outline Dimensions
Suggested Pad Layout
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product
described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website,
harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written
approval of the President of Diodes Incorporated.
A
M
JL
D
B C
H
K
SOT-26
Dim Min Max Typ
A 0.35 0.50 0.38
B 1.50 1.70 1.60
C 2.70 3.00 2.80
D ⎯ ⎯ 0.95
H 2.90 3.10 3.00
J 0.013 0.10 0.05
K 1.00 1.30 1.10
L 0.35 0.55 0.40
M 0.10 0.20 0.15
α 0° 8°
⎯
All Dimensions in mm
X
Z
Y
C
EE
G
Dimensions Value (in mm)
Z 3.20
G 1.60
X 0.55
Y 0.80
C 2.40
E 0.95
