Transient Voltage Suppression Diodes
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/07/17
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 by 10/1000µs (Note 1) PPPM 200 W
Thermal Resistance Junction- to-
Ambient RθJA 220 °C/W
Thermal Resistance Junction- to-
Lead RθJL 100 °C/W
Operating Temperature Range TJ-65 to 150 °C
Storage Temperature Range TSTG -65 to 175 °C
Notes:
1. Non-repetitive current pulse, per Fig. 4 and derated above TJ (initial) =25ºC per Fig. 3.
The SMF series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
This SMF package has a 50% smaller footprint as
compared to the SMA package and delivers one of the
lowest height profiles (1.1mm) available in the industry.
Applications
SMF components 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.
•Compatible with
industrial standard
package SOD-123FL
• Optimized surface mount
footprint for minimal PCB
space impact
• Low profile: maximum
height of 1.1mm.
• Low inductance, excellent
clamping capability
• Compatible with high
temperature reflow
soldering (260°C/40sec)
• Typical failure mode due
to exceeding maximum
ratings is a short circuit
condition
• Whisker test conducted
based on Table 4a and 4c
of JEDEC JESD201A
• IEC-61000-4-2 ESD
30kV(Air), 30kV (Contact)
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• 200W peak pulsepower
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
• Fast response time:
typically less than 1.0ns
from 0 Volts to VBR min
• Glass passivated junction
• Built-in strain relief
• UL Recognized epoxy
meeting flammability
classification 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
SMF Series
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
Uni-directional
RoHS
Pb
e3
Datasheet
Additional Infomarion
Resources
Samples
Transient Voltage Suppression Diodes
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/07/17
Surface Mount – 200W > SMF Series
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
SMF5.0A AE 6.40 7. 0 0 10 5.0 400 21.7 9.2 X
SMF6.0A AG 6.67 7.37 10 6.0 400 19.4 10.3 X
SMF6.5A AK 7.22 7.98 10 6.5 250 1 7. 9 11. 2 X
SMF7.0A AM 7.78 8.60 10 7.0 100 16.7 12.0 X
SMF7.5A AP 8.33 9.21 1 7.5 50 15.5 12.9 X
SMF8.0A AR 8.89 9.83 1 8.0 25 14.7 13.6 X
SMF8.5A AT 9.44 10.40 1 8.5 10 13.9 14.4 X
SMF9.0A AV 10.00 11. 10 1 9.0 5 13.0 15.4 X
SMF10A AX 11. 10 12.30 1 10 2.5 11. 8 1 7. 0 X
SMF11A AZ 12.20 13.50 1 11 2.5 11. 0 18.2 X
SMF12A BE 13.30 14.70 1 12 2.5 10.1 19.9 X
SMF13A BG 14.40 15.90 1 13 1. 0 9.3 21.5 X
SMF14A BK 15.60 17.20 1 14 1. 0 8.6 23.2 X
SMF15A BM 16.70 18.50 1 15 1. 0 8.2 24.4 X
SMF16A BP 17.80 19.70 1 16 1. 0 7. 7 26.0 X
SMF17A BR 18.90 20.90 1 17 1. 0 7. 2 27.6 X
SMF18A BT 20.0 0 22.10 1 18 1. 0 6.8 29.2 X
SMF20A BV 22.20 24.50 1 20 1. 0 6.2 32.4 X
SMF22A BX 24.40 26.90 1 22 1. 0 5.6 35.5 X
SMF24A BZ 26.70 29.50 1 24 1. 0 5.1 38.9 X
SMF26A CE 28.90 31.90 1 26 1. 0 4.8 42.1 X
SMF28A CG 31.10 34.40 1 28 1. 0 4.4 45.4 X
SMF30A CK 33.30 36.80 1 30 1. 0 4.1 48.4 X
SMF33A CM 36.70 40.60 1 33 1. 0 3.8 53.3 X
SMF36A CP 40.00 44.20 1 36 1. 0 3.4 58.1 X
SMF40A CR 44.40 49.10 1 40 1. 0 3.1 64.5 X
SMF43A CT 47.80 52.80 1 43 1. 0 2.9 69.4 X
SMF45A CV 50.00 55.30 1 45 1. 0 2.8 72.7 X
SMF48A CX 53.30 58.90 1 48 1. 0 2.6 77.4 X
SMF51A CZ 56.70 62.70 1 51 1. 0 2.4 82.4 X
SMF54A DE 60.00 66.30 1 54 1. 0 2.3 87.1 X
SMF58A RG 64.40 71.20 1 58 1. 0 2.1 93.6
SMF60A RK 66.70 73.70 1 60 1. 0 1. 8 96.8
SMF64A RM 71.10 78.60 1 64 1. 0 1. 7 103.0
SMF70A RP 77.80 86.00 1 70 1. 0 1. 5 113.0
SMF75A RR 83.30 92.10 1 75 1. 0 1. 4 121.0
SMF78A RT 86.70 95.80 1 78 1. 0 1. 4 126.0
SMF85A RV 94.40 104.00 1 85 1. 0 1. 3 137.0
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.
Transient Voltage Suppression Diodes
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/07/17
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
continues on next page.
Transient Voltage Suppression Diodes
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/07/17
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
10
100
1000
10000
110 100
V
br
- Reverse breakdown voltage
C
j
(pf)
Measured@50%Vr
Measured@Vr=0v
Figure 6 - Typical Junction Capacitance
0
20
40
60
80
100
0255075100 125175
Peak Pulse Power (P
PP) or Current (IPP)
Derating in Percentage
%
150
T
J
- Initial Junction Temperature (ºC)
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
Transient Voltage Suppression Diodes
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/07/17
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 – 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 2.50 2.90 0.0984 0.1142
B 3.40 3.90 0.1339 0.1535
C 0.70 1.20 0.0275 0.0472
D 1.50 2.00 0.0591 0.0787
E 0.35 0.90 0.0138 0.0354
F 0.05 0.26 0.0020 0.0102
G 0.00 0.10 0.000 0.0039
H 0.95 1. 10 0.0374 0.0433
A
B
C
D
E
E
F
H
G
1.6 (0.062) 1.3 (0.051)
1.4 (0.055)
Mounting Pad Layout
Transient Voltage Suppression Diodes
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/07/17
Surface Mount – 200W > SMF Series
Part Numbering System
VR
VOLTAGE
5%
VBR
VOLTAGE TOLERANCE
SMF xx A
SERIES
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
e BanddohtaC
L
F
YM
Trace Code Marking
Y:Year Code
M: Month Code
(for uni-directional products only)
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.
