TVS Diodes
Surface Mount – 400W > SMF4L Series
RoHS
SMF4L Series
Uni-directional
Description
Pb
e3
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%
• 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 V
BR
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 2
nd
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 and Thermal Characteristics
(T
A
=25
O
C unless otherwise noted)
Parameter
Peak Pulse Power 8/20µs (Note 2)
Dissipation at
T
A
=25ºC (Note 1) 10/1000µs (Note 3)
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Lead
Operating and Storage Temperature
Range
Symbol
P
PPM
400
R
θJA
R
θJL
T
J,
T
STG
220
100
-55 to
150
W
°C/W
°C/W
°C
Value
2000
Unit
W
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated above T
J
(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, V
CC
busses, POS terminal,
SSDs, power supplies, monitors, and vulnerable circuit
used in other consumer applications.
Functional Diagram
Bi-directional
Cathode
Uni-directional
Anode
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
TVS Diodes
Surface Mount – 400W > SMF4L Series
Electrical Characteristics
(T =25°C unless otherwise noted)
A
Part
Number
Marking
Code
Breakdown
Voltage V
BR
(Volts) @ I
T
MIN
MAX
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
I
T
(mA)
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
Maximum
Reverse Stand
Reverse
off Voltage
Leakage @ V
R
V
R
(V)
I
R
(µA)
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
800
800
500
200
100
50
20
10
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
Maximum
Peak Pulse
Current I
pp
(A)
40.1
35.9
33.1
30.9
28.7
27
.2
25.7
24.1
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
@I
pp
V
C
(V)
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
Agency
Approval
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
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
6.40
6.67
7
.22
7
.78
8.33
8.89
9.44
10.00
11.10
12.20
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
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
X
X
X
X
Notes:
1. V
BR
measured after I
T
applied for 300µs, I
T
= 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.
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
TVS Diodes
Surface Mount – 400W > SMF4L Series
I-V Curve Characteristics
Uni-directional
Vc V
BR
V
R
I
R
V
F
I
T
V
I
pp
P
PPM
V
R
V
BR
V
C
I
R
V
F
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 (I
T
)
Clamping Voltage
-- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
Reverse Leakage Current
-- Current measured at V
R
Forward Voltage Drop for Uni-directional
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
A
Figure 1 - TVS Transients Clamping Waveform
Voltage Transients
Figure 2 - Peak Pulse Power Rating Curve
10
Voltage Across TVS
Voltage or Current
P
PPM
-Peak Pulse Power (kW)
Current Through TVS
1
0.2x0.2" (5.0x5.0mm)
0.1
0.000001
Time
Copper Pad Area
0.00001
0.0001
0.001
t
d
-Pulse Width (sec.)
continues on next page.
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
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
100
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
80
60
40
20
0
Figure 4 - Pulse Waveform - 10/1000
µ
S
150
I
PPM
- Peak Pulse Current, % I
RSM
tr=10µsec
Peak Value
IPPM
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
100
Half Value
IPPM
IPPM
2
( )
10/1000µsec. Waveform
as defined by R.E.A
50
0
25
50
75
100
125 150
T
J
- Initial Junction Temperature (ºC)
175
0
td
0
1.0
2.0
t-Time (ms)
3.0
4.0
Figure 5 - Forward Voltage
Figure 6 - Typical Junction Capacitance
10000
V
f
- Typical forward dropped voltage@10mA
0.9
0.8
0.7
0.6
0.5
0.4
0
-55
1000
Cj (pF)
Uni-directional V=0v
100
Uni-directional V=
V
R
10
1
10
75
140
1
Temperature (ºC)
10
VBR - Reverse Breakdown Voltage (V)
100
Figure 7 - Peak Forward Voltage Drop vs. Peak Forward
Current
Figure 8 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
35
I F - Peak Forward Current(A)
10
IFSM - Peak Forward Surve Current(A)
0
0.5
1
1.5
2
2.5
3
3.5
4
30
25
20
15
10
5
0
1
10
Number of Cycles at 60 Hz
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
1
0.1
0.01
V F - Peak Forward Voltage(V)
100
TVS Diodes
Surface Mount – 400W > SMF4L Series
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp (T
A
)
to peak
T
S(max)
to T
A
- Ramp-up Rate
Reflow
- Temperature (T
A
) (Liquidus)
- Time (min to max) (t
s
)
Lead–free assembly
150°C
200°C
Temperature (T)
T
P
Ramp-up
t
p
Critical Zone
T
L
to T
P
60 – 180 secs
3°C/second max
3°C/second max
217°C
60 – 150 seconds
260
+0/-5
°C
20 – 40 seconds
6°C/second max
8 minutes Max.
260°C
T
L
T
s(max)
t
L
T
s(min)
Ramp-down
Preheat
t
s
25˚C
t 25˚C to Peak
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Time (t)
Environmental Specifications
High Temp. Storage
HTRB
Temperature Cycling
MSL
H3TRB
RSH
JESD22-A103
JESD22-A108
JESD22-A104
JEDEC-J-STD-020, Level 1
JESD22-A101
JESD22-A111
Physical Specifications
Case
Polarity
Terminal
Body Material
(Molded Compound)
SOD-123FL plastic over glass passivated
junction
Color band denotes cathode except
bipolar
Matte tin-plated leads, solderable per
JESD22-B102
Flammability (UL Recognized compound
meeting flammability rating V-0)
Dimensions
-
SOD-123FL Package
Dimensions
A
A
B
E
Millimeters
Min
2.90
3.50
0.85
1.70
0.43
0.10
0.00
0.90
Max
3.10
3.90
1.05
2.00
0.83
0.25
0.10
1.08
Min
0.114
0.138
0.033
0.067
0.017
0.004
0.000
0.035
Inches
Max
0.122
0.154
0.041
0.079
0.033
0.010
0.004
0.043
B
C
D
E
F
G
H
E
C
D
F
Mounting Pad Layout
1.6 (0.062)
G
H
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/05/18
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