Transient Voltage Suppression Diodes
Surface Mount – 400W > SMAJ series
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.
Features
typically less than 1.0ps
from 0 Volts to V
BR
min
less than 1μA
R
above 12V
soldering: 260°C/40
seconds at terminals
temperature coefficient
capability
ΔV
BR
= 0.1% x V
BR
@25°C x ΔT
applications to optimize
board space
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E230531
Maximum Ratings and Thermal Characteristics
(T
A
=25 C unless otherwise noted)
O
Parameter
Peak Pulse Power Dissipation at
T
A
=25ºC by 10x1000μs waveform
(Fig.1)(Note 1), (Note 2)
Power Dissipation on infinite heat
sink at T
A
=50
O
C
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
Maximum Instantaneous Forward
Voltage at 25A for Unidirectional
only (Note 4)
Operating Junction and Storage
Temperature Range
Typical Thermal Resistance Junction
to Lead
Typical Thermal Resistance Junction
to Ambient
Symbol
P
PPM
P
M(AV)
I
FSM
V
F
T
J
, T
STG
R
uJL
R
uJA
Value
400
3.3
40
3.5V/6.5
-65 to 150
30
120
Unit
W
W
A
V
°C
°C/W
°C/W
capability at 10 x 1000μs
waveform, repetition rate
(duty cycle): 0.01%
Underwriters Laboratory
Flammability 94V-O
Plated
Applications
TVS devices are ideal for the protection of I/O Interfaces,
V
CC
bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic applications.
Notes:
1. Non-repetitive current pulse, per Fig.3 and derated above T
A
=25ºC per Fig. 2.
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. V
F
< 3.5V for V
BR
<
200V and V
F
< 6.5V for V
BR
>
201V.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.
7
Revision: January 09, 2009
SMAJ Series
SMAJ Series
LITTELFUSE [ LITTELFUSE ]
