© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/20
TVS Diodes
Surface Mount – 200W > SMF Series
Description
Features
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter Symbol Value Unit
Peak Pulse Power Dissipation
at TA=25ºC
8/20μs PPPM
1000 W
10/1000μs (Note 2) 200
Power Dissipation On Infinite Heat Sink at
TL=50ºC PD1 W
Thermal Resistance Junction- to- Ambient RƟJA 220 °C/W
Thermal Resistance Junction- to- Lead RƟJL 100 °C/W
Operating Temperature Range TJ-65 to 150 °C
Storage Temperature Range TSTG -65 to 175 °C
The SMF series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
SMF package is 50% smaller in footprint when compare
to SMA package and deliverying one of the low height
profiles (1.1mm) in the industry.
Applications
SMF 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.
• 200W peak pulsepower
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
•Compatible with
industrial standard
package SOD-123FL
• Low profile: maximum
height of 1.1mm.
• Low inductance, excellent
clamping capability
• For surface mounted
applications to optimize
board space
• High temperature
to reflow soldering
guaranteed:
260°C/430sec
• 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
• 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)
• UL Recognized to UL
497B
Agency Agnecy File Number
E230531
Agency Approvals
SMF Series
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
RoHS
Pb
e3
Datasheet
Additional Infomarion
Resources
Samples
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated above TJ (initial) =25ºC per Fig. 3.
2. SMF90A~SMF100A Peak Pulse Power Dissipation is 170W min, 200W typical @ 10/1000us
Uni-directional
Bi-directional
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/20
TVS Diodes
Surface Mount – 200W > SMF Series
Part Number Marking Code Breakdown Voltage VBR
(Volts) @ IT Test Current IT
(mA)
Reverse Stand
off Voltage
VR (V)
Maximum Re-
verse Leakage
@ VR IR (µA)
Maximum Peak
Pulse Current
Ipp (A)
10*1000us
Maximum
Clamping
Voltage @Ipp
VC (V)
10*1000us
Agency Approval
Uni Bi Uni Bi MIN MAX Uni Bi
SMF5.0A SMF5.0CA AE HE 6.40 7. 0 0 10 5.0 400 21.7 9.2 X -
SMF6.0A SMF6.0CA AG HG 6.67 7.37 10 6.0 400 19.4 10.3 X -
SMF6.5A SMF6.5CA AK HK 7.22 7.98 10 6.5 250 1 7. 9 11.2 X -
SMF7.0A SMF7.0CA AM HM 7.78 8.60 10 7. 0 100 16.7 12.0 X -
SMF7.5A SMF7.5CA AP HP 8.33 9.21 1 7. 5 50 15.5 12.9 X -
SMF8.0A SMF8.0CA AR HR 8.89 9.83 1 8.0 25 14.7 13.6 X -
SMF8.5A SMF8.5CA AT HT 9.44 10.40 1 8.5 10 13.9 14.4 X -
SMF9.0A SMF9.0CA AV HV 10.00 11. 10 1 9.0 5 13.0 15.4 X -
SMF10A SMF10CA AX HX 11. 10 12.30 1 10 2.5 11. 8 1 7. 0 X -
SMF11A SMF11CA AZ HZ 12.20 13.50 1 11 2.5 11.0 18.2 X -
SMF12A SMF12CA BE IE 13.30 14.70 1 12 2.5 10.1 19.9 X -
SMF13A SMF13CA BG IG 14.40 15.90 1 13 1. 0 9.3 21.5 X -
SMF14A SMF14CA BK IK 15.60 17.20 1 14 1.0 8.6 23.2 X -
SMF15A SMF15CA BM IM 16.70 18.50 1 15 1. 0 8.2 24.4 X -
SMF16A SMF16CA BP IP 17.80 19.70 1 16 1.0 7. 7 26.0 X -
SMF17A SMF17CA BR IR 18.90 20.90 1 17 1. 0 7. 2 27.6 X -
SMF18A SMF18CA BT IT 20.0 0 22.10 1 18 1.0 6.8 29.2 X -
SMF20A SMF20CA BV IV 22.20 24.50 1 20 1. 0 6.2 32.4 X -
SMF22A SMF22CA BX IX 24.40 26.90 1 22 1.0 5.6 35.5 X -
SMF24A SMF24CA BZ IZ 26.70 29.50 1 24 1. 0 5.1 38.9 X -
SMF26A SMF26CA CE JE 28.90 31.90 1 26 1.0 4.8 42.1 X -
SMF28A SMF28CA CG JG 31.10 34.40 1 28 1. 0 4.4 45.4 X -
SMF30A SMF30CA CK JK 33.30 36.80 1 30 1. 0 4.1 48.4 X -
SMF33A SMF33CA CM JM 36.70 40.60 1 33 1. 0 3.8 53.3 X -
SMF36A SMF36CA CP JP 40.00 44.20 1 36 1. 0 3.4 58.1 X -
SMF40A SMF40CA CR JR 44.40 49.10 1 40 1. 0 3.1 64.5 X -
SMF43A SMF43CA CT JT 47.80 52.80 1 43 1. 0 2.9 69.4 X -
SMF45A SMF45CA CV JV 50.00 55.30 1 45 1. 0 2.8 72.7 X -
SMF48A SMF48CA CX JX 53.30 58.90 1 48 1. 0 2.6 77.4 X -
SMF51A SMF51CA CZ JZ 56.70 62.70 1 51 1. 0 2.4 82.4 X -
SMF54A SMF54CA DE KE 60.00 66.30 1 54 1. 0 2.3 87.1 X -
SMF58A SMF58CA RG KG 64.40 71.20 1 58 1.0 2.1 93.6 - -
SMF60A SMF60CA RK KK 66.70 73.70 1 60 1. 0 2.1 96.8 - -
SMF64A SMF64CA RM KM 71.10 78.60 1 64 1. 0 1.9 103.0 - -
SMF70A SMF70CA RP KP 77.80 86.00 1 70 1.0 1.7 113.0 - -
SMF75A SMF75CA RR KR 83.30 92.10 1 75 1. 0 1. 6 121.0 - -
SMF78A SMF78CA RT KT 86.70 95.80 1 78 1. 0 1.6 126.0 - -
SMF85A SMF85CA RV KV 94.40 104.00 1 85 1. 0 1.5 137.0 - -
SMF90A SMF90CA RW KX 100.00 111.00 1 90 1. 0 1.2 146.0 - -
SMF100A SMF100CA RX KZ 111.0 0 123.00 1 100 1.0 1.1 162.0 - -
SMF110A SMF110CA SE LE 122.00 135.00 1 110 1. 0 1.1 177.0 - -
SMF120A SMF120CA SG LG 133.00 147.00 1 120 1. 0 1. 0 193.0 - -
SMF130A SMF130CA SK LK 144.00 159.00 1 130 1.0 1. 0 209.0 - -
SMF150A SMF150CA SM LM 167.00 185.00 1 150 1. 0 0.8 243.0 - -
SMF160A SMF160CA SP LP 178.00 197.00 1 160 1. 0 0.8 259.0 - -
SMF170A SMF170CA SR LR 189.00 209.00 1 170 1.0 0.7 275.0 - -
SMF180A SMF180CA ST LT 201.00 222.00 1 180 1. 0 0.7 292.0 - -
SMF188A SMF188CA SV LV 209.00 231.00 1 188 1.0 0.7 304.0 - -
SMF200A SMF200CA SX LX 224.00 247.00 1 200 1.0 0.6 324.0 - -
SMF220A SMF220CA SZ LZ 246.00 272.00 1 220 1.0 0.6 356.0 - -
SMF250A SMF250CA TE ME 279.00 309.00 1 250 1. 0 0.5 405.0 - -
Electrical Characteristics (TA=25°C unless otherwise noted)
-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.
4. For bidirectional type having VR of 10 volts and less, the IR limit is double.
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/20
TVS Diodes
Surface Mount – 200W > SMF Series
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
0.1
1
10
0.0000010.000010.0001 0.001
td-Pulse Width (sec.)
PPPM-Peak Pulse Power (kW)
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
Vc VBR VR
IR
IT
Ipp
V
Vc
VBR
VR
Ipp
IR
IT
Bi-directional
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/20
TVS Diodes
Surface Mount – 200W > SMF Series
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
Figure 5 - Forward Voltage
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
Figure 6 - Typical Junction Capacitance
0%
20%
40%
60%
80%
100%
0255075100 125150 175
Peak Pluse Power(PPP) or Current(IPP)
Derating in Percentage %
TJ Initial Junction Temperature(˚C)
SMF5.0 ~ SMF100
SMF110 ~ SMF250
Figure 3 - Peak Pulse Power Derating Curve
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
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/20
TVS Diodes
Surface Mount – 200W > SMF Series
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
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 – 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
Dimensions - SOD-123FL Package
Dimensions Millimeters Inches
Min Max Min Max
A
SMF5.0A~SMF100A 2.50 2.90 0.0984 0.1142
SMF110A~SMF250A
SMF5.0CA~SMF250CA 2.90 3.10 0.1142 0.1220
B3.40 3.90 0.1339 0.1535
C0.70 1.20 0.0275 0.0472
D1.50 2.00 0.0591 0.0787
E0.35 0.90 0.0138 0.0354
F0.05 0.26 0.0020 0.0102
G0.00 0.10 0.000 0.0039
H
SMF5.0A~SMF100A 0.95 1.10 0.0374 0.0433
SMF110A~SMF250A
SMF5.0CA~SMF250CA 0.90 1.08 0.0354 0.0425
A
B
C
D
E
E
F
H
G
1.6 (0.062) 1.3 (0.051)
1.4 (0.055)
Mounting Pad Layout
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/02/20
TVS Diodes
Surface Mount – 200W > SMF Series
Part Numbering System
VR
Voltage
5%
VBR
Voltage T
olerance
SMF xx C A
Series
Bi-directional
Part Marking System
Packaging Options
Part number Component
Package Quantity Packaging Option Packaging Specification
SMFXXX SOD-123FL 3000 Tape & Reel – 8mm tape/7” reel EIA RS-481
SMFXXX-T13 SOD-123FL 10000 Tape & Reel – 8mm tape/13” reel EIA RS-481
XX
Marking Code
L
F
YM
Trace Code Marking
Y:Year Code
M: Month Code
(for uni-directional products only)
Cathode Band
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.
7.0 (178)
Dimensions are in inches
(and millimeters).
Direction of Feed
0.059 DIA
(1.5) Cover tape
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.