© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/23/18
TVS Diodes
Surface Mount > 1500W > 1.5SMCxxAT3G
• Working Peak Reverse Voltage Range − 5.8 V to 78 V
• Nominal Breakdown Voltage Range − 6.8 V to 91V
• Peak Power − 1500 W @ 1 ms
• ESD Rating of Class 3 (> 16 kV) per Human Body Model
• Low Leakage < 5 µA Above 10 V
• Maximum Temperature Coefficient Specified
• Response Time is Typically < 1 ns
• Pb−Free Packages are Available
Features
The 1.5SMCxxAT3G series is designed to protect voltage
sensitive components from high voltage, high energy
transients. They have excellent clamping capability, high
surge capability, low zener impedance and fast response
time. This 1.5SMCxxAT3G series is provided in an SMC
package ideally suited for small form factor requirements
found in communication , automotive, process control,
medical equipment and many other industrial and
consumer applications.
Description
Parameter Symbol Value Unit
Peak Power Dissipation (Note 1) @ TL =
25°C, Pulse Width = 1 ms PPK 1500 W
DC Power Dissipation @ TL = 75°C
Measured Zero Lead Length (Note 2)
Derate Above 75°C
Thermal Resistance from Junction−to−
Lead
PD
R
JL
4.0
54.6
18.3
W
mW/°C
°C/W
DC Power Dissipation (Note 3) @ TA =
25°C Derate Above 25°C
Thermal Resistance from Junction–
to– Ambient
PD
RθJA
0.75
6.1
165
W
mW/°C
°C/W
Forward Surge Current (Note 4)
@ TA = 25°C IFSM 200 A
Operating and Storage
Temperature Range TJ, Tstg
-65 to
+150 °C
Maximum Ratings and Thermal Characteristics
1.5SMCxxAT3G
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
Pb
Stresses exceeding Maximum Ratings may damage the component. 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 component reliability.
1. 10 x 1000 µs, non−repetitive.
2. 1 in square copper pad, FR−4 board.
3. FR−4 board, using Littelfuse minimum recommended footprint, as shown in 403-03
case outline dimensions spec.
4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per
minute maximum.
Additional Information
Samples
Resources
Datasheet
Bi-directional
Uni-directional
Cathode Anode
OBSOLETE/EOL
DATE June/30/2018 PCN/ECN# LFPCN41246
REPLACED BY 1.5SMC Series
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/23/18
TVS Diodes
Surface Mount > 1500W > 1.5SMCxxAT3G
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
I-V Curve Characteristics (TA = 25°C unless otherwise noted, VF = 3.5 V Max @ IF = 100 A) (Note 5)
5. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, non−repetitive duty cycle.
V
I
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/23/18
TVS Diodes
Surface Mount > 1500W > 1.5SMCxxAT3G
Electrical Characteristics (TA = 25°C unless otherwise noted)
Component* Component
Marking
V
RWM
(Note 6)
IR @
VRWM
Breakdown Voltage VC @ IPP (Note 8) MV BR
VBR (V) (Note 6 & 7) @ ITVCIPP
Volts µA MIN NOM MAX mA Volts Amps %/ C
1.5SMC6.8AT3G 6V8A 5.8 1000 6.45 6.8 7. 1 4 10 10.5 143 0.057
1.5SMC7.5AT3G 7V5A 6.4 500 7. 1 3 7. 5 7.88 10 11. 3 132 0.061
1.5SMC8.2AT3G 8V2A 7.02 200 7.79 8.2 8.61 10 12.1 124 0.065
1.5SMC10AT3G 10A 8.55 10 9.5 10 10.5 114.5 103 0.073
1.5SMC12AT3G 12A 10.2 511. 4 12 12.6 116.7 90 0.078
1.5SMC13AT3G 13A 11. 1 512.4 13 13.7 118.2 82 0.081
1.5SMC15AT3G 15A 12.8 514.3 15 15.8 121.2 71 0.084
1.5SMC16AT3G 16A 13.6 515.2 16 16.8 122.5 67 0.086
1.5SMC18AT3G 18A 15.3 51 7. 1 18 18.9 125.2 59.5 0.088
1.5SMC20AT3G 20A 1 7. 1 519 20 21 127.7 54 0.09
1.5SMC22AT3G 22A 18.8 520.9 22 23.1 130.6 49 0.092
1.5SMC24AT3G 24A 20.5 522.8 24 25.2 133.2 45 0.094
1.5SMC27AT3G 27A 23.1 525.7 27 28.4 137.5 40 0.096
1.5SMC30AT3G 30A 25.6 528.5 30 31.5 141.4 36 0.097
1.5SMC33AT3G 33A 28.2 531.4 33 34.7 145.7 33 0.098
1.5SMC36AT3G 36A 30.8 534.2 36 37.8 149.9 30 0.099
1.5SMC39AT3G 39A 33.3 537.1 39 41 153.9 28 0.1
1.5SMC43AT3G 43A 36.8 540.9 43 45.2 159.3 25.3 0.101
1.5SMC47AT3G 47A 40.2 544.7 47 49.4 164.8 23.2 0.101
1.5SMC51AT3G 51A 43.6 548.5 51 53.6 170.1 21.4 0.102
1.5SMC56AT3G 56A 47.8 553.2 56 58.8 177 19.5 0.103
1.5SMC62AT3G 62A 53 558.9 62 65.1 185 1 7. 7 0.104
1.5SMC68AT3G 68A 58.1 564.6 68 71.4 192 16.3 0.104
1.5SMC75AT3G 75A 64.1 571.3 75 78.8 1103 14.6 0.105
1.5SMC82AT3G 82A 70.1 577.9 82 86.1 1113 13.3 0.105
1.5SMC91AT3G 91A 77.8 586.5 91 95.5 1125 12 0.106
6. A transient suppressor is normally selected according to the maximum working peak reverse voltage (VRWM), which should be equal
to or greater than the DC or continuous peak operating voltage level.
7. V BR measured at pulse test current IT at an ambient temperature of 25°C.
8. Surge current waveform per Figure 2 and derate per Figure 3 of the General Data − 1500 Watt at the beginning of this group.
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/23/18
TVS Diodes
Surface Mount > 1500W > 1.5SMCxxAT3G
Figure 1. Pulse Rating Curve
Ratings and Characteristic Curves
Figure 2. Pulse Waveform
Figure 3. Pulse Derating Curve Figure 4. Dynamic Impedance
0
50
100
VALUE (%)
HALF VALUE - IPP
2
PEAK VALUE - IPP
t 10 s
tP
PULSE WIDTH (t
P) IS DEFINED AS
THAT POINT WHERE THE PEAK
CURRENT DECAYS TO 50% OF
IPP
.
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ TA= 25 C
100
80
60
40
20
0
120
140
160
≤
°
°
0 25 50 75 100 125 150
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/23/18
TVS Diodes
Surface Mount > 1500W > 1.5SMCxxAT3G
Dimensions
Part Marking System
NOTES
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. D DIMENSION SHALL BE MEASURED WITHIN DIMENSION P.
4. 403-01 THRU -02 OBSOLETE, NEW STANDARD 403-03.
Soldering Footrpint
Physical Specifications
Case Void-free, transfer-molded, thermosetting
plastic
Polarity Cathode indicated by polarity band
Mounting Position Any
Finish All external surfaces are corrosion
resistant and leads are readily solderable
Leads Modified L−Bend providing more contact
area to bond pads
ORDERING INFORMATION
Component Package Shipping
1SMCxxAT3G SMC
(Pb−Free)
2,500 /
Tape & Reel
Dim
Inches Millimeters
Min Nom Max Min Nom Max
A0.075 0.084 0.095 1.90 2.13 2.41
A1 0.002 0.004 0.006 0.05 0.10 0.15
b0.115 0.118 0.121 2.92 3.00 3.07
c0.006 0.009 0.012 0.15 0.23 0.30
D0.220 0.230 0.240 5.59 5.84 6.10
E0.260 0.270 0.280 6.60 6.86 7.11
HE0.305 0.313 0.320 7.75 7.94 8 .13
L0.030 0.040 0.050 0.76 1.02 1.27
L1 0.020 REF 0.51 REF
Flow/Wave Soldering (Solder Dipping)
Peak Temperature : 260OC
Dipping Time : 10 seconds
E
bD
c
L1L A1
A
H
E
D
mm
inches
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.
Specic Component Code
