TVS Diodes
Surface Mount – 400W > SMF4L Series
Pb e3
RoHS
SMF4L Series
Description
Uni-directional
The SMF4L series is packaged in the small SOD-123FL
form factor and is designed specifically to protect sensitive
electronic equipment from voltage transients induced by
lightning and other transient voltage events.
Features
• 400W peak pulsepower
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
IEC 61000-4-4
• Fast response time:
typically less than 1.0ns
from 0 Volts to VBR min
• Compatible with industrial
standard package SOD-
123FL
• Low inductance, excellent
clamping capability
• For surface mounted
applications to minimize
board space
•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
30kV(Air), 30kV (Contact)
• High temperature
soldering: 260°C/40
seconds at terminals
• Glass passivated junction
• Built-in strain relief
• UL Recognized compound
meeting flammability
rating V-0
• 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)
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E230531
Maximum Ratings andThermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Symbol
PPPM
Value
2000
Unit
W
8/20µs (Note 2)
Peak Pulse Power
Dissipation at
TA=25ºC (Note 1)
10/1000µs (Note 3)
400
220
W
Thermal Resistance Junction to
Ambient
RθJA
RθJL
°C/W
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
Thermal Resistance Junction to Lead
100
°C/W
°C
Operating and StorageTemperature
Range
-55 to
150
TJ,TSTG
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated aboveTJ (initial) =25ºC per Fig. 3.
2. SMF4L5.0A~SMF4L9.0A Peak Pulse Power Dissipation is 1850W min, 2000W
typical @8/20us
3. SMF4L5.0A~SMF4L9.0A Peak Pulse Power Dissipation is 370W min, 400W typical @
10/1000µs
Applications
SMF4L devices are ideal for the protection of portable
devices/hard drives, notebooks, VCC busses, POS terminal,
SSDs, power supplies, monitors, and vulnerable circuit
used in other consumer applications.
Functional Diagram
Cathode
Anode
Uni-directional
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18