TVS Diodes
Surface Mount – 400W > SMAJ series
Pb e3
RoHS
SMAJ Series
Description
The SMAJ series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Uni-directional
Bi-directional
Features
• 400W Peak pulse power
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
• Excellent clamping
capability
• Fast response time:
typically less than 1.0ps
from 0 Volts to VBR min
• Glass passivated junction
• Low inductance
• High temperature
to reflow soldering
guaranteed: 260°C/30sec
Agency Approvals
•Typical IR less than 1μA
when VBR min>12V
Agency
Agency File Number
• For surface mounted
applications to optimize
board space
• VBR @TJ= VBR@25°C
x (1+αT x (TJ - 25))
(αT:Temperature
Coefficient, typical value
is 0.1%)
• Plastic package is
flammability rated V-0 per
Underwriters Laboratories
• Meet MSL level1, per
J-STD-020, LF maximun
peak of 260°C
• Matte tin lead–free Plated
• Halogen free and RoHS
compliant
• Pb-free E3 means 2nd
level interconnect is
Pb-free and the terminal
finish material is tin(Sn)
(IPC/JEDEC J-STD-
609A.01)
E230531
• Low profile package
Maximum Ratings andThermal Characteristics
(TA=25OC unless otherwise noted)
•Typical failure mode is
short from over-specified
voltage or current
• Whisker test is conducted
based on JEDEC
JESD201A per its table 4a
and 4c
• IEC-61000-4-2 ESD
Parameter
Symbol
Value
Unit
Peak Pulse Power Dissipation atTA=25° by
10/1000us Waveform(Fig.2)(Note 1), (Note 2)
-Single Die Parts
Peak Pulse Power Dissipation atTA=25° by
10/1000us Waveform(Fig.2)(Note 1), (Note
2)-Stacked Die Parts(Note 5)
PPPM
400
W
PPPM
600
W
Power Dissipation on Infinite Heat Sink at
TL=50OC
30kV(Air), 30kV (Contact)
PD
IFSM
VF
3.3
60
W
A
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
IEC 61000-4-4
Peak Forward Surge Current, 8.3ms Single Half
Sine Wave (Note 3)
Maximum Instantaneous Forward Voltage at
25A for Unidirectional Only (Note 4)
3.5/5.0
V
OperatingTemperature Range
TJ
-65 to 150 °C
-65 to 175 °C
StorageTemperature Range
TSTG
RθJL
RθJA
• Built-in strain relief
TypicalThermal Resistance Junction to Lead
TypicalThermal Resistance Junction to Ambient
30
°C/W
°C/W
120
Notes:
Applications
1. Non-repetitive current pulse, per Fig.4 and derated above TJ (initial) =25ºC per Fig. 3.
2. Mounted on 5.0x5.0mm copper pad to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional device only.
4. VF < 3.5V for single die parts and VF< 5.0V for stacked-die parts.
5. For stacked die component details, please refer to part numbers labeled by * in Electrical Characteristics.
TVS devices are ideal for the protection of I/O Interfaces,
CC bus and other vulnerable circuits used inTelecom,
V
Computer, Industrial and Consumer electronic applications.
Functional Diagram
Additional Infomarion
Bi-directional
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Sꢀꢁꢂꢃes
ꢀesoꢁꢂꢃes
Cathode
Anode
Uni-directional
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.10/21/20
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