TVS Diodes
Surface Mount – 400W > SMF4L Series
SMF4L Series
RoHS Pb e3
Description
The SMF4L series of SOD-123FL small and flat lead lowprofile plastic package is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Uni-directional
Features
Bi-directional
Agency Approvals
Agency
Agency File Number
E230531
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Symbol
Peak Pulse Power
8/20μs (Note2)
Dissipation at TA=25ºC
10/1000μs (Note3)
(Note 1)
Power Dissipation On Infinite Heat Sink at
TL=50ºC
Value
Unit
2000
W
400
W
PD
1
W
Thermal Resistance Junction to Ambient
RƟJA
220
°C/W
Thermal Resistance Junction to Lead
RƟJL
100
°C/W
TJ,TSTG
-55 to
150
°C
Operating and Storage Temperature Range
PPPM
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated above TJ (initial) =25ºC per Fig. 3.
2. SMF4L5.0A~SMF4L8.5A Peak Pulse Power Dissipation is 1850W min, 2000W typical @8/20us
3. SMF4L5.0A~SMF4L8.5A Peak Pulse Power Dissipation is 370W min, 400W typical @ 10/1000μs,
SMF4L90A~SMF4L250A Peak Pulse Power Dissipation is 200W typical @ 10/1000μs
Functional Diagram
• 400W peak pulsepower
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
• Compatible with industrial
standard package SOD123FL
• Low profile: maximum
height of 1mm.
• Low inductance, excellent
clamping capability
• For surface mounted
applications to optimize
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
• 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)
• Recognized to UL 497B as
an Isolated Loop Circuit
Protector
Applications
SMF4L devices are ideal for the protection of I/O
interfaces, VCC bus and other vulnerable circuit used in
cellular phones, portable devices, business machines,
power supplies and other consumer applications.
Bi-directional
Cathode
Anode
Uni-directional
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/27/20
TVS Diodes
Surface Mount – 400W > SMF4L Series
Electrical Characteristics (T =25°C unless otherwise noted)
A
Part
Number
Marking
Code
Breakdown Voltage
VBR (Volts) @ IT
Uni-directional
Bi-directional
Uni-directional
Bi-directional
Min
Max
SMF4L5.0A
SMF4L6.0A
SMF4L6.5A
SMF4L7.0A
SMF4L7.5A
SMF4L8.0A
SMF4L8.5A
SMF4L9.0A
SMF4L10A
SMF4L11A
SMF4L12A
SMF4L13A
SMF4L14A
SMF4L15A
SMF4L16A
SMF4L17A
SMF4L18A
SMF4L20A
SMF4L22A
SMF4L24A
SMF4L26A
SMF4L28A
SMF4L30A
SMF4L33A
SMF4L36A
SMF4L40A
SMF4L43A
SMF4L45A
SMF4L48A
SMF4L51A
SMF4L54A
SMF4L58A
SMF4L60A
SMF4L64A
SMF4L70A
SMF4L75A
SMF4L78A
SMF4L85A
SMF4L90A
SMF4L100A
SMF4L110A
SMF4L120A
SMF4L130A
SMF4L150A
SMF4L160A
SMF4L170A
SMF4L180A
SMF4L188A
SMF4L200A
SMF4L220A
SMF4L250A
SMF4L9.0CA
SMF4L10CA
SMF4L11CA
SMF4L12CA
SMF4L13CA
SMF4L14CA
SMF4L15CA
SMF4L16CA
SMF4L17CA
SMF4L18CA
SMF4L20CA
SMF4L22CA
SMF4L24CA
SMF4L26CA
SMF4L28CA
SMF4L30CA
SMF4L33CA
SMF4L36CA
SMF4L40CA
SMF4L43CA
SMF4L45CA
SMF4L48CA
SMF4L51CA
-
KE
KG
KK
KM
KP
KR
KT
KV
KX
KZ
LE
LG
LK
LM
LP
LR
LT
LV
LX
LZ
ME
MG
MK
MM
MP
MR
MT
MV
MX
MZ
NE
NG
NK
NM
NP
NR
NT
NV
NX
NZ
OE
OG
OK
OM
OP
OR
OT
OV
OX
OZ
PE
AV
AX
AZ
BE
BG
BK
BM
BP
BR
BT
BV
BX
BZ
CE
CG
CK
CM
CP
CR
CT
CV
CX
CZ
-
6.40
6.67
7.22
7.78
8.33
8.89
9.44
10.00
11.10
12.2
13.30
14.40
15.60
16.70
17.80
18.90
20.00
22.20
24.40
26.70
28.90
31.10
33.30
36.70
40.00
44.40
47.80
50.00
53.30
56.70
60.00
64.40
66.70
71.10
77.80
83.30
86.70
94.40
100.00
111.00
122.00
133.00
144.00
167.00
178.00
189.00
201.00
209.00
224.00
246.00
279.00
7.00
7.37
7.98
8.60
9.21
9.83
10.40
11.10
12.30
13.50
14.70
15.90
17.20
18.50
19.70
20.90
22.10
24.50
26.90
29.50
31.90
34.40
36.80
40.60
44.20
49.10
52.80
55.30
58.90
62.70
66.30
71.20
73.70
78.60
86.00
92.10
95.80
104.00
111.00
123.00
135.00
147.00
159.00
185.00
197.00
209.00
222.00
231.00
247.00
272.00
309.00
Test
Current
IT (mA)
Reverse
Stand off
Voltage VR (V)
10
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5.0
6.0
6.5
7.0
7.5
8.0
8.5
9.0
10
11
12
13
14
15
16
17
18
20
22
24
26
28
30
33
36
40
43
45
48
51
54
58
60
64
70
75
78
85
90
100
110
120
130
150
160
170
180
188
200
220
250
Maximum
Maximum
Peak
Reverse
Pulse
Leakage @
VR IR (µA) Current Ipp (A)
800
800
500
200
100
50
20
5
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
40.1
35.9
33.1
30.9
28.7
27.2
25.7
26.4
23.5
22.0
20.1
18.6
17.2
16.4
15.4
14.5
13.7
12.3
11.3
10.3
9.5
8.8
8.3
7.5
6.9
6.2
5.8
5.5
5.2
4.9
4.6
4.3
4.1
3.9
3.5
3.3
3.2
2.9
1.4
1.2
1.1
1.0
1.0
0.8
0.8
0.7
0.7
0.7
0.6
0.6
0.5
Maximum
Clamping
Voltage
@Ipp VC (V)
Agency
Approval
9.2
10.3
11.2
12.0
12.9
13.6
14.4
15.4
17.0
18.2
19.9
21.5
23.2
24.4
26.0
27.6
29.2
32.4
35.5
38.9
42.1
45.4
48.4
53.3
58.1
64.5
69.4
72.7
77.4
82.4
87.1
93.6
96.8
103.0
113.0
121.0
126.0
137.0
146.0
162.0
177.0
193.0
209.0
243.0
259.0
275.0
292.0
304.0
324.0
356.0
405.0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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.3.
3. All terms and symbols are consistent with ANSI/IEEE C62.35.
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/27/20
TVS Diodes
Surface Mount – 400W > SMF4L Series
I-V Curve Characteristics
Bi-directional
Uni-directional
Ipp
Vc VBR VR
Vc VBR VR
V
IR VF
IT
IT
IR
IR
IT
V
Ipp
Ipp
PPPM
VR
VBR
VC
IR
VF
VR VBR Vc
Peak Pulse Power Dissipation -- Max power dissipation
Stand-off Voltage -- Maximum voltage that can be applied to the TVS without operation
Breakdown Voltage -- Maximum voltage that flows though the TVS at a specified test current (IT)
Clamping Voltage -- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
Reverse Leakage Current -- Current measured at VR
Forward Voltage Drop for Uni-directional
Ratings and Characteristic Curves (T =25°C unless otherwise noted)
A
Figure 1 - TVS Transients Clamping Waveform
Figure 2 - Peak Pulse Power Rating Curve
10
PPPM-Peak Pulse Power (kW)
Voltage Transients
Voltage or Current
Voltage Across TVS
Current Through TVS
1
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
0.1
0.000001
Time
0.00001
0.0001
0.001
td-Pulse Width (sec.)
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/27/20
TVS Diodes
Surface Mount – 400W > SMF4L Series
Ratings and Characteristic Curves (T =25°C unless otherwise noted) (Continued)
A
Figure 3 - Peak Pulse Power Derating Curve
Figure 4 - Pulse Waveform - 10/1000µS
150
80
60
40
20
0
25
50
75
100 125 150
TJ - Initial Junction Temperature (ºC)
0
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
Peak Value
IPPM
100
Half Value
IPPM IPPM
( )
2
50
0
175
10/1000µsec. Waveform
as defined by R.E.A
td
1.0
0
2.0
3.0
4.0
t-Time (ms)
Figure 5 - Forward Voltage
Figure 6 - Typical Junction Capacitance
10000
0.9
0.8
Uni-directional V=0V
1000
0.7
Bi-directional V=0V
0.6
Cj(pF)
Vf - Typical forward dropped voltage@10mA
tr=10µsec
IPPM- Peak Pulse Current, % IRSM
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage %
100
100
0.5
Uni & Bi-directional V=VR
0.4
10
0
-55
10
75
140
1
Temperature (ºC)
1
10
100
1000
VBR-Reverse Breakdown Voltage (V)
Figure 7 - Peak Forward Voltage Drop vs. Peak Forward
Current
Figure 8 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
IFSM - Peak Forward Surve Current(A)
I F - Peak Forward Current(A)
35
10
1
0.1
0.01
0
0.5
1
1.5
2
2.5
3
V F - Peak Forward Voltage(V)
3.5
4
30
25
20
15
10
5
0
1
10
100
Number of Cycles at 60 Hz
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/27/20
TVS Diodes
Surface Mount – 400W > SMF4L Series
Soldering Parameters
Lead–free assembly
Pre Heat
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (min to max) (ts)
60 – 120 secs
Average ramp up rate (Liquidus Temp (TL) to peak
3°C/second max
TS(max) to TL - Ramp-up Rate
3°C/second max
Reflow
- Temperature (TL) (Liquidus)
217°C
- Time (min to max) (tL)
60 – 150 seconds
Peak Temperature (TP)
260+0/-5 °C
Time within 5°C of actual peak Temperature (tp)
30 seconds Max
Ramp-down Rate
6°C/second max
Time 25°C to peak Temperature (TP)
8 minutes Max.
Do not exceed
260°C
Physical Specifications
tp
TP
Ramp-up
TL
Temperature (T)
Reflow Condition
Critical Zone
TL to TP
tL
Ts(max)
Ramp-down
Ts(min)
ts
Preheat
25˚C
t 25˚C to Peak
Time (t)
Environmental Specifications
Case
SOD-123FL plastic over glass passivated junction
High Temp. Storage
JESD22-A103
Polarity
Color band denotes cathode except bipolar
HTRB
JESD22-A108
Terminal
Matte tin-plated leads, solderable per
JESD22-B102
Temperature Cycling
JESD22-A104
MSL
JEDEC-J-STD-020, Level 1
H3TRB
JESD22-A101
RSH
JESD22-A111
Dimensions
Min
Max
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
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
B
A
Inches
Max
A
C
Millimeters
Min
E
E
Dimensions - SOD-123FL Package
G
H
D
Mounting Pad Layout
2.24 (0.088)
0.98 (0.039)
1.25 (0.049)
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/27/20
TVS Diodes
Surface Mount – 400W > SMF4L Series
Part Numbering System
Part Marking System
SMF4L xx C A
LF
5% VBR Voltage Tolerance
XX
YM
Cathode Band
(For Uni-directional Products Only)
Marking Code
Trace Code Marking
Y: Year Code
M: Month Code
Bi - directional
VR Voltage
Series
Packaging Options
Part number
Component
Package
SMF4LXXX
SOD-123FL
Quantity
3000
Packaging Option
Tape & Reel – 8mm tape/7” reel
Packaging Specification
EIA RS-481
Tape and Reel Specification
0.157
(4.0)
Cathode
0.31
(8.0)
0.157
(4.0)
0.059 DIA
(1.5)
7” 7.0 (178)
0.80 (20.2)
Arbor Hole Dia.
0.33
(8.5)
Cover tape
Dimensions are in inches
(and millimeters).
Direction of Feed
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are
not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/27/20
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