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Features
• 400W Peak Pulse Power Dissipation
• Excellent Clamping Capability
• Fast Response Time
• Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
NEW PRODUCT
Green
PSMAJ440
400W SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR
Mechanical Data
• Case: SMA
• Case Material: Molded Plastic. 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 Indicator: Cathode Band
• Weight: 0.064 grams (approximate)
Top View Bottom View
e3
Ordering Information (Note 4)
Part Number Case Packaging
PSMAJ440A-13 SMA 5000/Tape & Reel
Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
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.
Marking Information
Maximum Ratings (@T
Peak Pulse Power Dissipation
(Non repetitive current pulse derated above T
(Note 5)
Peak Forward Surge Current, 8.3ms Single Half Sine Wave
Superimposed on Rated Load (Note 6)
Steady State Power Dissipation @ TL = +120°C PM
Instantaneous Forward Voltage @ IPP = 25A (Note 6) VF
Notes: 5. Non-repetitive current pulse, per Fig. 4 and derated above TA = +25°C, per Fig.1.
6. Measured with 8.3ms single half sine-wave. Duty cycle = 4 pulses per minute maximum.
= +25°C, unless otherwise specified.)
A
Characteristic Symbol Value Unit
440A
= +25°C, T
A
YWW
P =
PSMAJ440A
Document number: DS36176 Rev. 2 - 2
440A = Product type marking code
= Manufacturers’ code marking
YWW = Date code marking
Y = Last digit of year (ex: 2 for 2012)
WW = Week code (01 to 53)
1ms)
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PPK
I
FSM
(AV)
400 W
40 A
1.0 W
6.5 V
February 2014
© Diodes Incorporated
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P
P
U
RATING
O
O
Thermal Characteristics
Characteristic Symbol Value Unit
Operating Temperature Range
Storage Temperature Range
T
J
T
STG
Electrical Characteristics (@T
Reverse Standoff
Part Number
Voltage
V
(V)
RWM
= +25°C, unless otherwise specified.)
A
Breakdown
Voltage
@ IT
V
BR
Test
Current
(Note 7)
Min (V) Max (V)
IT (mA) IR (μA) VC (V)
Max. Reverse
Leakage @
V
RWM
Max. Clamping
I
pp
PSMAJ440A 376 418 462 1.0 5.0 602.0 0.66
Notes: 7. VBR measured with IT current pulse = 300µs
100
NEW PRODUCT
10000
T = 25°C
J
F
75
1000
IN %
-55 to +150 °C
-55 to +175 °C
Voltage @
(tp = 10x1000µs)
(see fig 4)
Pulse Current
PSMAJ440
Max. Peak
I
pp
(A)
Marking
Code
440A
LSE DE
EAK
P , PEAK PULSE POWER (kW)
PEAK POWER OR CURRENT
100
10
1.0
PK
50
25
0
0
10 X 1000 Waveform
as defined by REA
50 75 100 125 150 175 200
25
T , AMBIENT TEMPERATURE ( C)
A
Figure 1 Pulse Derating Curve
Non repetitive
pulse waveform
shown in Figure 4
°
T = +25CJ°
100
TAL CAPACITANCE (pF)
10
T
C,T
I , PEAK PULSE CURRENT (%I )
Measured at
f = 1MHz
1.0V Signal
RMS
Bias = 0V
1
1 10 100 1000
DC
V , STANDOFF VOLTAGE (V)
WM
Figure 2 Typical Total Capacitance
Ppp
0.1
0.1 1.0 10 100
t PULSE WIDTH (µs)
p
Figure 3 Pulse Rating Curve
PSMAJ440A
Document number: DS36176 Rev. 2 - 2
1,000 10,000
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t, TIME (ms)
Figure 4 Pulse Waveform
February 2014
© Diodes Incorporated
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P
O
RWAR
U
R
G
CUR
RENT
P
T
Y STATE P
O
R
P
TIO
N
NEW PRODUCT
60
(A)
50
40
E
30
D S
20
EAK F
10
FSM
I,
0
2
Figure 5 Maximum Non-Repetitive Surge Current
5
NUMBER OF CYCLES AT 60Hz
10
20
50
1001
Package Outline Dimensions
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
A
J
B
C
D
H
G
E
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for latest version.
1.0
(W)
0.8
A
DISSI
0.6
WE
0.4
0.2
EAD
(AV),
0
M S
0
Dim Min Max
A 2.29 2.92
B 4.00 4.60
C 1.27 1.63
D 0.15 0.31
E 4.80 5.59
G 0.05 0.20
H 0.76 1.52
J 2.01 2.30
All Dimensions in mm
SMA
Dimensions
Z 6.5
G 1.5
X 1.7
Y 2.5
C 4.0
50 75
25
T , LEAD TEMPERATURE ( C)
L
Figure 6 Steady State Power Derating Curve
SMA
Value (in mm)
100 125
PSMAJ440
150 175
°
200
PSMAJ440A
Document number: DS36176 Rev. 2 - 2
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February 2014
© Diodes Incorporated
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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
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This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
NEW PRODUCT
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
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 © 2014, Diodes Incorporated
www.diodes.com
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
IMPORTANT NOTICE
LIFE SUPPORT
PSMAJ440
PSMAJ440A
Document number: DS36176 Rev. 2 - 2
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February 2014
© Diodes Incorporated
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