Page 1
(AV)
Features
• 400W Peak Pulse Power Dissipation
• Unidirectional and Bidirectional Versions Available
• Excellent Clamping Capability
• Fast Response Time
• Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
ADVANCE INFORMATION
Ordering Information (Note 4)
Green
PSMAJ400(C)A
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
Top View
• Terminals: Lead Free Plating (Matte Tin Finish). Solderable per
MIL-STD-202, Method 208
• Polarity Indicator: Cathode Band (Note: Bi-directional devices
have no polarity indicator.)
• Weight: 0.064 grams (approximate)
SMA
Bottom View
Part Number Case Packaging
PSMAJ400(C)A-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 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.
Marking Information
YWW
400x
Maximum Ratings (@T
= +25°C, unless otherwise specified.)
A
Characteristic Symbol Value Unit
Peak Pulse Power Dissipation
(Non repetitive current pulse derated above T
= +25° C, T
A
P =
Peak Forward Surge Current, 8.3ms Single Half Sine Wave Superimposed
on Rated Load (Notes 6 & 7)
Steady State Power Dissipation @ TL = +120°C PM
Instantaneous Forward Voltage @ IPP = 25A (Notes 6 & 7) 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.
7. Unidirectional units only.
PSMAJ400(C)A
Document number: DS35914 Rev. 3 - 2
400x = Product type marking code
400C – BI
400A – UNI
= Manufacturers’ code marking
YWW = Date code marking
Y = Last digit of year (ex: 2 for 2012)
WW = Week code (01 to 53)
P
I
FSM
PK
1ms) (Note 5)
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400 W
40 A
1.0 W
6.5 V
November 2012
© Diodes Incorporated
Page 2
pp
P
P
U
RATIN
G IN
O
P
F
O
RWAR
URG
C
U
R
RENT
PSMAJ400(C)A
Thermal Characteristics
Characteristic Symbol Value Unit
Operating Temperature Range
Storage Temperature Range
T
J
T
STG
Electrical Characteristics (@T
Part Number
Add C For
Bidirectional
(Note 8)
Reverse
Standoff
Voltage
V
(V)
RWM
Breakdown
V
@ IT (Note 9)
BR
Min (V) Max (V)
= +25°C, unless otherwise specified.)
A
Voltage
Test
Current
Max. Reverse
Leakage @ V
IT (mA) IR (μA) VC (V)
RWM
Max. Clamping
Voltage @ I
PSMAJ400(C)A 342 380 420 1.0 5.0 548.0 0.73 400C 400A
Notes: 8. Suffix C denotes Bi-directional device.
9. V
measured with IT current pulse = 300μs
BR
100
ADVANCE INFORMATION
F
%
75
100
10
-55 to +150
-55 to +175
Max. Peak Pulse
pp
Current
I
Marking Code
(A) BI- UNI-
T = +25C
°
J
Non repetitive
pulse waveform
shown in Fig. 3
°C
°C
50
LSE DE
25
PEAK POWER OR CURRENT
EAK
10 X 1000 Waveform
as defined by REA
0
0
50 75 100 125 150 175 200
25
T , AMBIENT TEMPERATURE ( C)
A
Figure 1 Pu lse Deratin g C ur ve
Ppp
I , PEAK PULSE CURRENT (%I )
1.0
PK
P , PEAK PULSE POWER (kW)
0.1
0.1 1.0 10 100
°
t PULSE WIDTH (µs)
p
1,000 10,000
Figure 2 P ulse Rating Curve
60
(A)
50
40
E
30
D S
20
EAK
10
FSM
I,
0
t, TIME (ms)
Figure 3 Pulse Waveform
2
5
10
20
50
1001
NUMBER OF CYCLES AT 60Hz
Figure 4 Max i m um Non-Repe t it ive Surge C ur r e nt
PSMAJ400(C)A
Document number: DS35914 Rev. 3 - 2
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November 2012
© Diodes Incorporated
Page 3
P
T
Y STATE P
O
R
P
TIO
N
1.0
(W)
0.8
A
DISSI
0.6
WE
0.4
0.2
EAD
(AV),
0
M S
0
50 75
25
T , LEAD TEMPERATURE ( C)
L
Figure 5 Steady State Power Derating Curve
100 125
150 175
°
200
Package Outline Dimensions
ADVANCE INFORMATION
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
A
J
B
C
D
G
H
E
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
Y
X
X1
G
C
PSMAJ400(C)A
SMA
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
Dimensions Value (in mm)
C 4.00
G 1.50
X 2.50
X1 6.50
Y 1.70
PSMAJ400(C)A
Document number: DS35914 Rev. 3 - 2
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November 2012
© Diodes Incorporated
Page 4
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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
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indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
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final and determinative format released by Diodes Incorporated.
ADVANCE INFORMATION
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 © 2012, 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
PSMAJ400(C)A
PSMAJ400(C)A
Document number: DS35914 Rev. 3 - 2
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November 2012
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