TVS Diodes Datasheet
SMAJ-HRA Series
Surface Mount - 400W
RoHS
Pb
e4
Description
The SMAJ-HRA High Reliability series is designed
Uni-directional
specifically to protect sensitive electronic equipment from
voltage transients induced by lightning and other transient
voltage events.
Bi-directional
Features
■ Excellent clamping capability
■ Glass passivated junction
■ Low inductance
■ Typical IR ≤ 1μA for VR > 10V
■ For surface mounted
applications to optimize board
space
■ High temperature to reflow
soldering guaranteed:
260°C/40sec
Agency Approvals
■ Low profile package
■ VBR @TJ= VBR@25°C x (1+αT
x (TJ - 25))(αT:Temperature
Coefficient, typical value is
0.1%) Coefficient, typical value
■ Typical failure mode is short
from over-specified voltage or
current
Agency
Agency File/Certificate Number
E230531
■ Whisker test is conducted
based on JEDEC JESD201A
per its table 4a and 4c
■ UL Recognized epoxy meeting
flammability rating V-0
Maximum Ratings &Thermal Characteristics
(TA=25°C unless otherwise noted)
■ Meet MSL level1, per
J-STD-020, LF maximun peak
of 260°C
■ ESD protection of data lines in
accordance with IEC 61000-4-
2, 30kV(Air), 30kV (Contact)
Parameter
Symbol
Value
Unit
■ Matte tin lead–free Plated
■ EFT protection of data lines in
accordance with IEC 61000-
4-4
Peak Pulse Power Dissipation (IPP
VC) by 10/1000μs Waveform (Fig.2)
(Note 1), (Note 2)
x
■ Halogen free and RoHS
compliant
PPPM
400
W
■ Pb-free E3 means 2nd level
interconnect is Pb-free and
the terminal finish material
is tin(Sn) (IPC/JEDEC J-STD-
609A.01)
■ Built-in strain relief
Power Dissipation on Infinite Heat
Sink atTL=50°C
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
Maximum Instantaneous Forward
Voltage at 25A for Unidirectional
Only
PD
IFSM
VF
3.3
60
W
A
■ 400W Peak pulse power
capability at 10/1000μs
waveform, repetition rate (duty
cycle): 0.01%
V
3.5
■ Fast response time: typically
less than 1.0ps from 0 Volts to
VBR min
OperatingTemperature Range
TJ
-65 to 150
-65 to 175
°C
°C
StorageTemperature Range
TSTG
TypicalThermal Resistance Junction
to Lead
30
°C/W
°C/W
RθJL
RθJA
TypicalThermal Resistance Junction
to Ambient
120
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated aboveTJ (initial) =25OC per Fig. 3.
2. Mounted on copper pad area of 0.31x0.31” (8.0 x 8.0mm) to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional
component only
Functional Diagram
Applications
TVS Components are ideal for the protection of I/O Interfaces, VCC
bus and other vulnerable circuits used in Telecom, Computer,
Industrial and Consumer electronic applications.
Bi-directional
Cathode
Anode
Uni-directional
© 2022 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/30/22