TVS Diodes
Surface Mount – 400W > SMF4L Series
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
Description
Features
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter Symbol Value Unit
Peak Pulse Power
Dissipation at
TA=25ºC (Note 1)
8/20µs (Note 2)
PPPM
2000 W
10/1000µs (Note 3) 400 W
Thermal Resistance Junction to
Ambient RθJA 220 °C/W
Thermal Resistance Junction to Lead RθJL 100 °C/W
Operating and Storage Temperature
Range TJ,TSTG
-55 to
150 °C
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated above TJ (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
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.
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.
• 400W peak pulsepower
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
• 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)
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Fast response time:
typically less than 1.0ns
from 0 Volts to VBR min
• 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 AGENCY FILE NUMBER
E230531
Agency Approvals
SMF4L Series
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
RoHS
Pb
e3
Uni-directional
TVS Diodes
Surface Mount – 400W > SMF4L Series
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
Electrical Characteristics (TA=25°C unless otherwise noted)
Part
Number
Marking
Code
Breakdown
Voltage VBR
(Volts) @ IT
Test
Current
IT
(mA)
Reverse Stand
off Voltage
VR (V)
Maximum
Reverse
Leakage @ VR
IR (µA)
Maximum
Peak Pulse
Current Ipp
(A)
Maximum
Clamping
Voltage
@Ipp
VC (V)
Agency
Approval
MIN MAX
SMF4L5.0A KE 6.40 7. 0 0 10 5.0 800 40.1 9.2 X
SMF4L6.0A KG 6.67 7.37 10 6.0 800 35.9 10.3 X
SMF4L6.5A KK 7.22 7.98 10 6.5 500 33.1 11. 2 X
SMF4L7.0A KM 7.78 8.60 10 7.0 200 30.9 12.0 X
SMF4L7.5A KP 8.33 9.21 1 7.5 100 28.7 12.9 X
SMF4L8.0A KR 8.89 9.83 1 8.0 50 27.2 13.6 X
SMF4L8.5A KT 9.44 10.40 1 8.5 20 25.7 14.4 X
SMF4L9.0A KV 10.00 11. 10 1 9.0 10 24.1 15.4 X
SMF4L10A KX 11. 10 12.30 1 10 5 23.5 1 7. 0 X
SMF4L11A KZ 12.20 13.50 1 11 1 22.0 18.2 X
SMF4L12A LE 13.30 14.70 1 12 1 20.1 19.9 X
SMF4L13A LG 14.40 15.90 1 13 1 18.6 21.5 X
SMF4L14A LK 15.60 17.20 1 14 11 7. 2 23.2 X
SMF4L15A LM 16.70 18.50 1 15 1 16.4 24.4 X
SMF4L16A LP 17.80 19.70 1 16 1 15.4 26.0 X
SMF4L17A LR 18.90 20.90 1 17 1 14.5 27.6 X
SMF4L18A LT 20.00 22.10 1 18 1 13.7 29.2 X
SMF4L20A LV 22.20 24.50 1 20 1 12.3 32.4 X
SMF4L22A LX 24.40 26.90 1 22 1 11. 3 35.5 X
SMF4L24A LZ 26.70 29.50 1 24 1 10.3 38.9 X
SMF4L26A ME 28.90 31.90 1 26 1 9.5 42.1 X
SMF4L28A MG 31.10 34.40 1 28 1 8.8 45.4 X
SMF4L30A MK 33.30 36.80 1 30 1 8.3 48.4 X
SMF4L33A MM 36.70 40.60 1 33 1 7. 5 53.3 X
SMF4L36A MP 40.00 44.20 1 36 1 6.9 58.1 X
SMF4L40A MR 44.40 49.10 1 40 1 6.2 64.5 X
SMF4L43A MT 47.80 52.80 1 43 1 5.8 69.4 X
SMF4L45A MV 50.00 55.30 1 45 1 5.5 72.7 X
SMF4L48A MX 53.30 58.90 1 48 1 5.2 77.4 X
SMF4L51A MZ 56.70 62.70 1 51 1 4.9 82.4 X
SMF4L54A NE 60.00 66.30 1 54 1 4.6 87.1 X
SMF4L58A NG 64.40 71.20 1 58 1 4.3 93.6 X
SMF4L60A NK 66.70 73.70 1 60 1 4.1 96.8 X
SMF4L64A NM 71.10 78.60 1 64 1 3.9 103.0 X
SMF4L70A NP 77.80 86.00 1 70 1 3.5 113.0 X
SMF4L75A NR 83.30 92.10 1 75 1 3.3 121.0 X
SMF4L78A NT 86.70 95.80 1 78 1 3.2 126.0 X
SMF4L85A NV 94.40 104.00 1 85 1 2.9 137.0 X
SMF4L90A NX 100.00 111.0 0 1 90 1 1. 4 146.0
SMF4L100A NZ 111. 0 0 123.00 1 100 11. 2 162.0 X
SMF4L110A OE 122.00 135.00 1 110 11. 1 177.0 X
SMF4L120A OG 133.00 147.00 1 120 11. 0 193.0 X
SMF4L130A OK 144.00 159.00 1 130 11. 0 209.0 X
SMF4L150A OM 167.00 185.00 1 150 10.8 243.0 X
SMF4L160A OP 178.00 197.00 1 160 10.8 259.0 X
SMF4L170A OR 189.00 209.00 1 170 10.7 275.0 X
SMF4L180A OT 201.00 222.00 1 180 10.7 292.0 X
SMF4L188A OV 209.00 231.00 1 188 10.7 304.0 X
SMF4L200A OX 224.00 247.00 1 200 1 0.6 324.0 X
SMF4L220A OZ 246.00 272.00 1 220 1 0.6 356.0 X
SMF4L250A PE 279.00 309.00 1 250 1 0.5 405.0 X
Notes:
1. VBR measured after IT applied for 300µs, IT = square wave pulse or equivalent.
2. Surge current waveform per 10/1000µs exponential wave and derated per Fig.2.
3. All terms and symbols are consistent with ANSI/IEEE C62.35.
TVS Diodes
Surface Mount – 400W > SMF4L Series
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
Ratings and Characteristic Curves (TA=25°C unless otherwise noted)
Voltage Transients
Time
Voltage Across TVS
Current Through TVS
Voltage or Current
Figure 1 - TVS Transients Clamping Waveform Figure 2 - Peak Pulse Power Rating Curve
I-V Curve Characteristics
PPPM Peak Pulse Power Dissipation -- Max power dissipation
VR Stand-off Voltage -- Maximum voltage that can be applied to the TVS without operation
VBR Breakdown Voltage -- Maximum voltage that flows though the TVS at a specified test current (IT)
VC Clamping Voltage -- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
IR Reverse Leakage Current -- Current measured at VR
VF Forward Voltage Drop for Uni-directional
Vc VBR VR
IR
IT
Ipp
V
Uni-directional
VF
continues on next page.
0.1
1
10
0.0000010.000010.0001 0.001
t
d
-Pulse Width (sec.)
P
PPM
-Peak Pulse Power (kW)
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
TVS Diodes
Surface Mount – 400W > SMF4L Series
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
Ratings and Characteristic Curves (TA=25°C unless otherwise noted) (Continued)
0
0.4
0.5
0.6
0.7
0.8
0.9
-551075140
Temperature (ºC)
Vf - Typical forward dropped voltage@10mA
Figure 5 - Forward Voltage
Figure 3 - Peak Pulse Power Derating Curve
IPPM- Peak Pulse Current, % IRSM
0
0
50
100
150
1.0 2.0 3.0 4.0
tr=10µsec
Peak Value
IPPM
IPPM
2
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
10/1000µsec. Waveform
as defined by R.E.A
td
t-Time (ms)
Half Value
IPPM ( )
Figure 4 - Pulse Waveform - 10/1000µS
0
20
40
60
80
100
0255075100 125 175
Peak Pulse Power (P
PP) or Current (IPP)
Derating in Percentage
%
150
TJ - Initial Junction Temperature (ºC)
1
10
100
1000
10000
110100
Cj (pF)
VBR -Reverse Breakdown Voltage (V)
Uni-directional V=0v
Uni-directional V=
V
R
Figure 6 - Typical Junction Capacitance
0.01
0.1
1
10
00.5 11.5 22.5 33.5 4
IF-Peak Forward Current(A)
VF-Peak Forward Voltage(V)
Figure 7 - Peak Forward Voltage Drop vs. Peak Forward
Current
0
5
10
15
20
25
30
35
110100
IFSM -Peak Forward Surve Current(A)
Number of Cycles at 60 Hz
Figure 8 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
TVS Diodes
Surface Mount – 400W > SMF4L Series
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
Physical Specifications
Case SOD-123FL plastic over glass passivated
junction
Polarity Color band denotes cathode except
bipolar
Terminal Matte tin-plated leads, solderable per
JESD22-B102
Body Material
(Molded Compound)
Flammability (UL Recognized compound
meeting flammability rating V-0)
Environmental Specifications
High Temp. Storage JESD22-A103
HTRB JESD22-A108
Temperature Cycling JESD22-A104
MSL JEDEC-J-STD-020, Level 1
H3TRB JESD22-A101
RSH JESD22-A111
Soldering Parameters
Temperature (T)
Time (t)
Ts(min)
Ts(max)
TL
TP
ts
Preheat
tL
tp
Ramp-up Critical Zone
TL to TP
Ramp-down
t 25˚C to Peak
25˚C
Reflow Condition Lead–free assembly
Pre Heat
- Temperature Min (Ts(min)) 150°C
- Temperature Max (Ts(max)) 200°C
- Time (min to max) (ts) 60 – 180 secs
Average ramp up rate (Liquidus Temp (TA)
to peak 3°C/second max
TS(max) to TA - Ramp-up Rate 3°C/second max
Reflow - Temperature (TA) (Liquidus) 217°C
- Time (min to max) (ts) 60 – 150 seconds
Peak Temperature (TP) 260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
Do not exceed 260°C
Dimensions - SOD-123FL Package
Dimensions
Millimeters Inches
Min Max Min Max
A 2.90 3.10 0.114 0.122
B 3.50 3.90 0.138 0.154
C 0.85 1.05 0.033 0.041
D 1.70 2.00 0.067 0.079
E 0.43 0.83 0.017 0.033
F 0.10 0.25 0.004 0.010
G 0.00 0.10 0.000 0.004
H 0.90 1.08 0.035 0.043
TVS Diodes
Surface Mount – 400W > SMF4L Series
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
Part Numbering System
VR
VOLTAGE
5%
VBR
VOLTAGE TOLERANCE
SMF4L xx A
SERIES
Part Marking System
Packaging Options
Part number Component
Package Quantity Packaging Option Packaging
Specification
SMF4LXXX SOD-123FL 3000 Tape & Reel – 8mm tape/7” reel EIA RS-481
XX
Marking Code
e BanddohtaC
L
F
YM
Trace Code Marking
Y:Year Code
M: Month Code
Cathode
Tape and Reel Specification
0.31
(8.0)
0.157
(4.0)
0.157
(4.0)
0.33
(8.5)
0.80 (20.2)
Arbor Hole Dia.
Optional
7” 7.0 (178)
13” 13.0 (330) Dimensions are in inches
(and millimeters).
Direction of Feed
0.059 DIA
(1.5) Cover tape