1Publication Order Number:
SMF5.0AT1/D
SMF5.0AT1G Series,
SZSMF5.0AT1G Series
200 W Transient
Voltage Suppressor
SOD-123 Flat Lead Package
The SMF5.0AT1G Series is designed to protect voltage sensitive
components from high voltage, high energy transients. Excellent
clamping capability, high surge capability, low zener impedance and
fast response time. Because of its small size, it is ideal for use in
cellular phones, portable devices, business machines, power supplies
and many other industrial/consumer applications.
Features
•Stand−off Voltage: 5 − 58 Volts
•Peak Power − 200 Watts @ 1 ms (SMF5.0A − SMF58A)
•Low Leakage
•Response Time is Typically < 1 ns
•ESD Rating of Class 3 (> 16 kV) per Human Body Model
•ESD Rating of Level 4 (8 kV Contact Discharge) per IEC61000−4−2
•EFT (Electrical Fast Transients) Rating of 40 A per IEC61000−4−4
•Low Profile − Maximum Height of 1.0 mm
•Small Footprint − Footprint Area of 8.45 mm2
•Supplied in 8 mm Tape and Reel − 3,000 Units per Reel
•Cathode Indicated by Polarity Band
•Lead Orientation in Tape: Cathode Lead to Sprocket Holes
•SZ Prefix for Automotive and Other Applications Requiring Unique
Site and Control Change Requirements; AEC−Q101 Qualified and
PPAP Capable
•These Devices are Pb−Free and are RoHS Compliant
Mechanical Characteristics:
CASE: Void-free, transfer-molded, thermosetting plastic
Epoxy Meets UL 94 V−0
LEAD FINISH: 100% Matte Sn (Tin)
MOUNTING POSITION: Any
QUALIFIED MAX REFLOW TEMPERATURE: 260°C
Device Meets MSL 1 Requirements
PLASTIC SURFACE MOUNT
ZENER OVERVOLTAGE
TRANSIENT SUPPRESSOR
5 − 58 VOLTS
200 WATT PEAK POWER
Device Package Shipping
ORDERING INFORMATION
12
1: CATHODE
2: ANODE
SOD−123FL
CASE 498
MARKING DIAGRAM
1
CATHODE
2
ANODE
See specific marking information in the device marking
column of the Electrical Characteristics table on page 3 of
this data sheet.
DEVICE MARKING INFORMATION
SMFxxxAT1G SOD−123FL
(Pb−Free)
3,000 /
Tape & Reel
xx = Device Code (Refer to page 3)
M = Date Code
G= Pb−Free Package
(Note: Microdot may be in either location)
xx M G
G
SZSMFxxxAT1G SOD−123FL
(Pb−Free)
3,000 /
Tape & Reel
Littelfuse.com
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 7
Uni−Directional TVS
IPP
IF
V
I
IR
IT
VRWM
VCVBR
VF
SMF5.0AT1G Series, SZSMF5.0AT1G Series
MAXIMUM RATINGS
Rating Symbol Value Unit
Maximum Ppk Dissipation (PW−10/1000 ms) (Note 1) SMF5.0A − SMF58A Ppk 200 W
Maximum Ppk Dissipation @ TA = 25°C, (PW−8/20 ms) (Note 2) Ppk 1000 W
DC Power Dissipation
@ TA = 25°C (Note 3)
Derate above 25°C
Thermal Resistance, Junction−to−Ambient (Note 3)
°PD°
RqJA
385
4.0
325
°mW
mW/°C
°C/W
Thermal Resistance, Junction−to−Lead (Note 3) RqJcathode 26 °C/W
Operating and Storage Temperature Range TJ, Tstg −55 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Non−repetitive current pulse at TA = 25°C, per waveform of Figure 2.
2. Non−repetitive current pulse at TA = 25°C, per waveform of Figure 3.
3. Mounted with recommended minimum pad size, DC board FR−4.
ELECTRICAL CHARACTERISTICS (TA = 25°C unless
otherwise noted, VF = 3.5 V Max. @ IF (Note 4) = 12 A)
Symbol Parameter
IPP Maximum Reverse Peak Pulse Current
VCClamping Voltage @ IPP
VRWM Working Peak Reverse Voltage
IRMaximum Reverse Leakage Current @ VRWM
VBR Breakdown Voltage @ IT
ITTest Current
IFForward Current
VFForward Voltage @ IF
4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms,
duty cycle = 4 pulses per minute maximum.
2Publication Order Number:
SMF5.0AT1/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 7
SMF5.0AT1G Series, SZSMF5.0AT1G Series
ELECTRICAL CHARACTERISTICS (TL = 30°C unless otherwise noted, VF = 1.25 Volts @ 200 mA)
Device* Marking
VRWM (V) VBR @ IT (V) (Note 6) ITIR @ VRWM VC(Max) IPP(Max) (A)
(Note 5) Min Nom Max (mA) (mA) (V) (Note 7)
SMF5.0AG KE 5 6.4 6.7 7 10 400 9.2 21.7
SMF6.0AG KG 6 6.67 7.02 7.37 10 400 10.3 19.4
SMF6.5AG KK 6.5 7.22 7.6 7.98 10 250 11.2 17.9
SMF7.0AG KM 7 7.78 8.2 8.6 10 100 12 16.7
SMF7.5AG KP 7.5 8.33 8.77 9.21 1 50 12.9 15.5
SMF8.0AG KR 8 8.89 9.36 9.83 1 25 13.6 14.7
SMF9.0AG KV 9 10 10.55 11.1 1 5 15.4 13.0
SMF10AG KX 10 11.1 11.7 12.3 1 2.5 17 11.8
SMF11AG KZ 11 12.2 12.85 13.5 1 2.5 18.2 11.0
SMF12AG LE 12 13.3 14 14.7 1 2.5 19.9 10.1
SMF13AG LG 13 14.4 15.15 15.9 1 1 21.5 9.3
SMF14AG LK 14 15.6 16.4 17.2 1 1 23.2 8.6
SMF15AG LM 15 16.7 17.6 18.5 1 1 24.4 8.2
SMF18AG LT 18 20 21 22.1 1 1 29.2 6.8
SMF20AG LV 20 22.2 23.35 24.5 1 1 32.4 6.2
SMF22AG LX 22 24.4 25.6 26.9 1 1 35.5 5.6
SMF24AG LZ 24 26.7 28.1 29.5 1 1 38.9 5.1
SMF26AG ME 26 28.9 30.4 31.9 1 1 42.1 4.8
SMF28AG MG 28 31.1 32.8 34.4 1 1 45.4 4.4
SMF30AG MK 30 33.3 35.1 36.8 1 1 48.4 4.1
SMF33AG MM 33 36.7 38.7 40.6 1 1 53.3 3.8
SMF36AG MP 36 40 42.1 44.2 1 1 58.1 3.4
SMF48AG MX 48 53.3 56.1 58.9 1 1 77.4 2.6
SMF51AG MZ 51 56.7 59.7 62.7 1 1 82.4 2.4
SMF58AG NG 58 64.4 67.8 71.2 1 1 93.6 2.1
5. A transient suppressor is normally selected according to the Working Peak Reverse Voltage (VRWM) which should be equal to or greater
than the DC or continuous peak operating voltage level.
6. VBR measured at pulse test current IT at ambient temperature of 25°C.
7. Surge current waveform per Figure 2 and derate per Figure 3.
*Include SZ-prefix devices where applicable.
3Publication Order Number:
SMF5.0AT1/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 7
SMF5.0AT1G Series, SZSMF5.0AT1G Series
tP
, PULSE WIDTH (ms)
100
1000
10,000
1.0 10 100
10
01234
0
50
100
t, TIME (ms)
VALUE (%)
HALF VALUE −IRSM
2
PEAK VALUE − IRSM
tr
TYPICAL PROTECTION CIRCUIT
Vin VL
Zin
LOAD
tP
PULSE WIDTH (tP) IS DEFINED
AS THAT POINT WHERE THE PEAK
CURRENT DECAYS TO 50%
OF IRSM.
Figure 1. Pulse Rating Curve Figure 2. 10 X 1000 ms Pulse Waveform
1000 10,000
Figure 3. 8 X 20 ms Pulse Waveform
PP
, PEAK POWER (WATTS)
tr≤ 10 ms
100
80
60
40
20
00 25 50 75 100 125 150
TA, AMBIENT TEMPERATURE (°C)
120
140
160
Figure 4. Pulse Derating Curve
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ TA = 25°C
100
90
80
70
60
50
40
30
20
10
0020406080
t, TIME (ms)
% OF PEAK PULSE CURRENT
tP
tr
PULSE WIDTH (tP) IS DEFINED
AS THAT POINT WHERE THE
PEAK CURRENT DECAY = 8 ms
PEAK VALUE IRSM @ 8 ms
HALF VALUE IRSM/2 @ 20 ms
4Publication Order Number:
SMF5.0AT1/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 7
SMF5.0AT1G Series, SZSMF5.0AT1G Series
1.2
1.0
0.8
0.6
0.4
0.2
0
−55 25 85 150
T, TEMPERATURE (°C)
V , TYPICAL FORWARD VOLTAGE (VOLTS)
F
25 50 75 100 125 175
T, TEMPERATURE (°C)
P , MAXIMUM POWER DISSIPATION (m
W
D
150
1000
100
1
1 10 1000
WORKING PEAK REVERSE VOLTAGE (VOLTS)
C, CAPACITANCE (pF)
MEASURED @ 50% VRWM
MEASURED @ ZERO BIAS
Figure 5. Typical Derating Factor for Duty Cycle
DERATING FACTOR
1 ms
10 ms
1
0.7
0.5
0.3
0.05
0.1
0.2
0.01
0.02
0.03
0.07
100 ms
0.1 0.2 0.5 2 5 10 501 20 100
D, DUTY CYCLE (%)
PULSE WIDTH
10 ms
Figure 6. Steady State Power Derating
Figure 7. Forward Voltage Figure 8. Capacitance versus Working Peak
Reverse Voltage
10
100
350
300
250
200
150
400
100
50
0
0
5Publication Order Number:
SMF5.0AT1/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 7
SMF5.0AT1G Series, SZSMF5.0AT1G Series
PACKAGE DIMENSIONS
SOD−123FL
CASE 498
ISSUE D
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH.
4. DIMENSIONS D AND J ARE TO BE MEASURED ON FLAT SECTION
OF THE LEAD: BETWEEN 0.10 AND 0.25 MM FROM THE LEAD TIP.
D
E
b
A
A1
L
c
POLARITY INDICATOR
OPTIONAL AS NEEDED
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
SOLDERING FOOTPRINT
DIM
A
MIN NOM MAX MIN
MILLIMETERS
0.90 0.95 0.98 0.035
INCHES
A1 0.00 0.05 0.10 0.000
b0.70 0.90 1.10 0.028
c0.10 0.15 0.20 0.004
D1.50 1.65 1.80 0.059
E2.50 2.70 2.90 0.098
L0.55 0.75 0.95 0.022
0.037 0.039
0.002 0.004
0.035 0.043
0.006 0.008
0.065 0.071
0.106 0.114
0.030 0.037
NOM MAX
3.40 3.60 3.80 0.134 0.142 0.150
HE
− −
0°8°0°8°
q
q
q
TOP VIEW
BOTTOM VIEW
SIDE VIEW
HE
2X
2X
END VIEW
RECOMMENDED
DIMENSIONS: MILLIMETERS
1.25
2X
4.20
1.22
2X
12
Littelfuse.com
6Publication Order Number:
SMF5.0AT1/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 7
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 shall not be used for, any purpose (including, without limitation,
military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any
other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than
those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for
any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of
products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse
products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.