1N4448WSF
Document number: DS35380 Rev. 3 - 2 1 of 4
www.diodes.com August 2011
© Diodes Incorporated
1N4448WSF
NEW PRODUCT
SURFACE MOUNT FAST SWITCHING DIODE
Features
• Fast Switching Speed: trr ≤ 4.0ns
• Low Leakage Current: IR ≤ 25nA
• Low Capacitance: CT ≤ 4pF
• Flat Lead for High Thermal Efficiency
• Small Surface Mount Package
• Lead, Halogen and Antimony Free, RoHS Compliant (Note 1)
• "Green" Device (Note 2)
• Qualified to AEC-Q101 Standards for High Reliability
Mechanical Data
• Case: SOD323F
• Case Material: Molded Plastic, “Green Molding Compound”.
UL Flammability Classification Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020
• Terminal Connections: Cathode Band
• Terminals: Finish - Matte Tin annealed over Copper Alloy
leadframe. Solderable per MIL-STD-202, Method 208
• Weight: 0.007 grams (approximate)
Ordering Information (Note 3)
Part Number Qualification Case Packaging
1N4448WSF-7 Commercial SOD323F 3000/Tape & Reel
1N4448WSFQ-7 Automotive SOD323F 3000/Tape & Reel
Notes: 1. No purposefully added lead. Halogen and Antimony Free.
2. Diodes Inc.'s "Green" policy can be found on our website at http://www.diodes.com.
3. For packaging details, go to our website at http://www.diodes.com.
Marking Information
Date Code Key
Year 2011 2012 2013 2014 2015 2016 2017 2018
Code Y Z A B C D E F
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
Top View
SOD323F
TK = Product Type Marking Code
YM = Date Code Marking
Y = Year (ex: Y = 2011)
M = Month (ex: 9 = September)
TK
YM
1N4448WSF
Document number: DS35380 Rev. 3 - 2 2 of 4
www.diodes.com August 2011
© Diodes Incorporated
1N4448WSF
NEW PRODUCT
Maximum Ratings @TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Non-Repetitive Peak Reverse Voltage VRM 100 V
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
VRRM
VRWM
VR 75 V
RMS Reverse Voltage VR
(
RMS
)
53 V
Forward Continuous Current IFM 500 mA
Average Rectified Output Current IO 250 mA
Non-Repetitive Peak Forward Surge Current @ t = 1.0
μ
s
@ t = 1.0s IFSM 4
0.5 A
Thermal Characteristics
Characteristic Symbol Value Unit
Power Dissipation (Note 4) PD 400 mW
Thermal Resistance Junction to Ambient Air (Note 4) R
θ
JA 313 °C/W
Operating and Storage Temperature Range TJ, TSTG -65 to +150 °C
Electrical Characteristics @TA = 25°C unless otherwise specified
Characteristic Symbol Min Max Unit Test Condition
Reverse Breakdown Voltage (Note 5) V
(
BR
)
R 75 ⎯ V IR = 100μA
Forward Voltage VF
0.62 0.72
V
IF = 5.0mA
⎯ 0.855 IF = 10mA
⎯ 1.0 IF = 100mA
⎯ 1.25 IF = 150mA
Leakage Current (Note 5) IR
⎯ 2.5 μA VR = 75V
⎯ 50 μA VR = 75V, TJ = 150°C
⎯ 30 μA VR = 25V, TJ = 150°C
⎯ 25 nA VR = 20V
Total Capacitance CT ⎯ 4.0 pF
VR = 0, f = 1.0MHz
Reverse Recovery Time trr ⎯ 4.0 ns
IF = IR = 10mA,
Irr = 0.1 x IR, RL = 100Ω
Notes: 4. Part mounted on FR-4 PC board with minimum recommended pad layouts, which can be found on our website at http://www/diodes.com.
5. Short duration pulse test used to minimize self-heating.
1N4448WSF
Document number: DS35380 Rev. 3 - 2 3 of 4
www.diodes.com August 2011
© Diodes Incorporated
1N4448WSF
NEW PRODUCT
0
200
02550 75 100 125 150
P
P
O
WE
R
DISSI
P
A
T
I
O
N
(mW)
D
,
T , AMBIENT TEMPERATURE ( C)
Fig. 1 Forward Current Derating Curve
A
°
400
Note 4
500
300
100
0.0001
0.001
0.01
0.1
1
0 0.4 0.8 1.2 1.6
V , INST ANTANEOUS FORW ARD VOLT AGE (V)
Fig. 2 Typical Forward Characteristics
F
I , INS
T
AN
T
ANE
O
U
S F
O
R
WA
R
D
C
U
R
R
EN
T
(A)
F
V , INSTANTANEOUS REVERSE VOLTAGE (V)
Fig. 3 Typical Reverse Characteristics
R
I , INS
T
AN
T
ANE
O
U
S
R
EVE
R
SE
C
U
R
R
EN
T
(A)
R
μ
0.001
0.01
0.1
1
10
100
0 102030405060708090100
T = 25C
°
A
T = C
°
A
-55
T = 5C
°
A
8
T = 25C
°
A
1
T = C
°
A
150
V , DC REVERSE VOL TAGE (V)
Fig . 4 Tot al Cap acitance vs. Reverse Voltage
R
C
,
T
O
T
AL
C
A
P
A
C
I
T
A
N
C
E (pF)
T
0
0.5
1
1.5
110
f = 1MHz
40
Package Outline Dimensions
SOD323F
Dim Min Max Typ
A 0.60 0.75 −
b 0.25 0.35 −
c 0.05 0.26 −
D 1.15 1.35 1.25
E 1.60 1.80 1.70
He 2.30 2.70 2.50
L1 0.30 0.50 0.40
α1 − − 7°
α2 − − 3°
β1 − − 7°
β2 − − 3°
All Dimensions in mm
A
He
E
Db (2x)
c
L1
β
2
β
1
α
2
α
1
1N4448WSF
Document number: DS35380 Rev. 3 - 2 4 of 4
www.diodes.com August 2011
© Diodes Incorporated
1N4448WSF
NEW PRODUCT
Suggested Pad Layout
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 p roducts for any unintended or una uthorized 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 p atents 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 pro ducts and an y
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 © 2011, Diodes Incorporated
www.diodes.com
Dimensions Value (in mm)
X 0.710
Y 0.403
C 2.700
C
Y (2x)
X (2 x)
