Green
SMAT70A / SMBT70A
400W, 600W SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR
Features
•
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400, 600W Peak Pulse Power Dissipation
70V Standoff Voltage
100V Maximum Clamping Voltage - A requirement of many -
48V Backplane Telecom Applications
Glass Passivated Die Construction
Fast Response Time: Typically less than 1 ps
Lead Free Finish, RoHS Compliant (Note 4)
Green Molding Compound (No Halogen and Antimony)
(Note 5)
Qualified to AEC-Q101 Standards for High Reliability
Mechanical Data
•
•
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Case: SMA / SMB
Case Material: Molded Plastic. UL Flammability Classification
Rating 94V-0
Moisture Sensitivity: Level 1 per J-STD-020D
Terminals: Lead Free Plating (Matte Tin Finish). Solderable
per MIL-STD-202, Method 208
Polarity Indicator: Cathode Band
Marking Information: See Page 2
Ordering Information: See Page 2
Weight: SMA 0.064 grams (approximate)
SMB 0.093 grams (approximate)
Top View
Bottom View
Maximum Ratings
@T
A
= 25°C unless otherwise specified
Symbol
P
PK
I
FSM
V
F
SMAT70A
400
40
3.5
SMBT70A
600
100
Unit
W
A
V
Characteristic
Peak Pulse Power Dissipation
(Non repetitive current pulse derated above T
A
= 25° C)
Peak Forward Surge Current, 8.3ms Single Half Sine Wave
Superimposed on Rated Load (Note 2)
Instantaneous Forward Voltage @ I
PP
= 35A (Note 2)
Thermal Characteristics
Characteristic
Operating and Storage Temperature Range
Symbol
T
J
, T
STG
Value
-55 to +150
Unit
°C
Electrical Characteristics
Reverse
Standoff
Voltage
V
RWM
(V)
SMAT70A
SMBT70A
Notes:
1.
2.
3.
4.
5.
@T
A
= 25°C unless otherwise specified
Max.
Reverse
Leakage @
V
RWM
I
R
(μA)
5.0
5.0
Max.
Clamping
Voltage @
I
pp
V
C
(V)
100
100
Max. Peak
Pulse Current
I
pp
(A)
3.5
5.3
Typical
Junction
Capacitance
(Note 3)
(pF)
140
290
Typical
Voltage
Temp.
Variation
of V
BR
mV/°C
80
80
KEX
NPX
Part Number
Breakdown
Voltage
V
BR
@ I
T
(Note 3)
Min
(V)
77.8
77.8
Max
(V)
89.5
89.5
Test
Current
Marking
Code
I
T
(mA)
1.0
1.0
70
70
Measured with 8.3ms single half sine-wave. Duty cycle = 4 pulses per minute maximum.
V
BR
measured with I
T
current pulse = 300μs.
f = 1MHz, V
R
= 0VDC.
EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/quality/lead_free.html.
Product manufactured with Data Code 0924 (week 24, 2009) and newer are built with Green Molding Compound.
SMAT70A / SMBT70A
Document number: DS30213 Rev. 10 - 2
1 of 4
www.diodes.com
July 2009
© Diodes Incorporated
SMAT70A / SMBT70A
100
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT
75
50
25
10 X 1000 Waveform
as defined by REA
I
PP
, PEAK PULSE CURRENT (%I
pp
)
t
p
0
0
25
50
75
100 125 150 175
T
A
, AMBIENT TEMPERATURE (
°
C)
Fig. 1 Pulse Derating Curve
200
t, TIME (ms)
Fig. 2 Pulse Waveform
100
T
J
= 25
°
C
100
P
D
, PEAK PULSE POWER (kW)
Non Repetitive
Pulse Waveform
Shown in Fig. 3
10
SMBT70A
V
BR
, BREAKDOWN VOLTAGE
10,000
95
90
85
1.0
SMAT70A
80
0.1
0.1
75
1.0
1,000
10
100
t
p
, PULSE WIDTH (µs)
Fig. 3 Pulse Rating Curve
50
100
125
150
25
75
T
A
, AMBIENT TEMPERATURE (°C)
Fig. 4 Average Breakdown Voltage vs. Ambient Temperature
0
Ordering Information
Part Number
SMAT70A-13-F
SMBT70A-13-F
Notes:
(Note 6)
Case
SMA
SMB
Packaging
5000/Tape & Reel
3000/Tape & Reel
6. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
xxx = Product type marking code
See Electrical Characteristics Table
= Manufacturers’ code marking
YWW = Date code marking
Y = Last digit of year ex: 2 for 2002
WW = Week code 01 to 52
YWW
xxx
SMAT70A / SMBT70A
Document number: DS30213 Rev. 10 - 2
2 of 4
www.diodes.com
July 2009
© Diodes Incorporated
SMAT70A / SMBT70A
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
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website, harmless against all damages.
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Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
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indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
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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 © 2009, Diodes Incorporated
www.diodes.com
SMAT70A / SMBT70A
Document number: DS30213 Rev. 10 - 2
4 of 4
www.diodes.com
July 2009
© Diodes Incorporated
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