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Green
SMAT70A / SMBT70A
400W, 600W SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR
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Features
Mechanical Data
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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
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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
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)
Symbol
P PK
I FSM
V F
SMAT70A
400
40
3.5
SMBT70A
600
100
Unit
W
A
V
Thermal Characteristics
Characteristic
Operating and Storage Temperature Range
Symbol
T J , T STG
Value
-55 to +150
Unit
° C
Electrical Characteristics
@T A = 25°C unless otherwise specified
Part Number
Reverse
Standoff
Voltage
V RWM (V)
Breakdown
Voltage
V BR @ I T
(Note 3)
Min
Max
(V)
(V)
Test
Current
I T (mA)
Max.
Reverse
Leakage @
V RWM
I R ( μ A)
Max.
Clamping
Voltage @
I pp
V C (V)
Max. Peak
Pulse Current
I pp
(A)
Typical
Junction
Capacitance
(Note 3)
(pF)
Typical
Voltage
Temp.
Variation
of V BR
mV/ ° C
Marking
Code
SMAT70A
SMBT70A
70
70
77.8
77.8
89.5
89.5
1.0
1.0
5.0
5.0
100
100
3.5
5.3
140
290
80
80
KEX
NPX
Notes:
1.
2.
3.
4.
5.
Measured with 8.3ms single half sine-wave. Duty cycle = 4 pulses per minute maximum.
V BR measured with I T current pulse = 300 μ s.
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
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