© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/21/18
TVS Diodes
Surface Mount > 400W > 1SMA10CAT3G Series, SZ1SMA10CAT3G Series
• Working Peak Reverse Voltage Range − 10 V to 78 V
• Standard Zener Breakdown Voltage Range −
11.7 V to 91.3 V
• Peak Power − 400 Watts @ 1 ms
• ESD Rating of Class 3 (> 16 kV) per Human Body Model
• Response Time is Typically < 1 ns
• Flat Handling Surface for Accurate Placement
• Package Design for Top Slide or Bottom Circuit
Board Mounting
• Low Profile Package
• SZ Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−
Q101 Qualified and PPAP Capable
• These are Pb−Free Devices
Features
The SMA 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.
The SMA series is supplied in the Littelfuse exclusive,
cost-effective, highly reliable package and is ideally
suited for use in communication systems, automotive,
numerical controls, process controls, medical equipment,
business machines, power supplies and many other
industrial/consumer applications.
Description
Parameter Symbol Value Unit
Peak Power Dissipation (Note 1) @ TL =
25°C, Pulse Width = 1 ms PPK 400 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
1. 5
20
50
W
mW/°C
°C/W
DC Power Dissipation (Note 3) @ TA =
25°C Derate Above 25°C
Thermal Resistance from Junction–to–
Ambient
PD
R0JA
0.5
4.0
250
W
mW/°C
°C/W
Operating and Storage Temperature
Range TJ, Tstg
-65 to
+150 °C
Maximum Ratings and Thermal Characteristics
1SMA10CAT3G Series, SZ1SMA10CAT3G Series
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
Pb
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If
any of these limits are exceeded, device functionality should not be assumed, damage may
occur and reliability may be affected.
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 403B
case outline dimensions spec. Additional Information
Samples
Resources
Datasheet
Bi-directional
Uni-directional
Cathode Anode
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/21/18
TVS Diodes
Surface Mount > 400W > 1SMA10CAT3G Series, SZ1SMA10CAT3G Series
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
VF Forward Voltage @ IF
I-V Curve Characteristics (TA = 25°C unless otherwise noted, VF = 3.5 V Max @ IF = 100 A) (Note 5)
I
PP
I
PP
I
R
I
T
I
T
I
R
V
RWM
V
C
V
BR
V
RWM
V
C
V
BR
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/21/18
TVS Diodes
Surface Mount > 400W > 1SMA10CAT3G Series, SZ1SMA10CAT3G Series
Electrical Characteristics (TA = 25°C unless otherwise noted)
Breakdown Voltage VC @ IPP (Note 8)
C Typ.
(Note 7)
Device* Device
Marking
V
RWM
(Note 6)
IR @
VRWM
VBR (V) (Note 7) @ ITVCIPP
Volts µA MIN NOM MAX mA Volts Amps pF
1SMA10CAT3G QXC 10 2.5 11. 1 11.69 12.27 1. 0 1 7. 0 23.5 580
1SMA12CAT3G REC 12 2.5 13.3 14.00 14.70 1. 0 19.9 20.1 490
1SMA13CAT3G RGC 13 2.5 14.4 15.16 15.92 1. 0 21.5 18.6 455
1SMA15CAT3G RMC 15 2.5 16.7 17.58 18.46 1. 0 24.4 16.4 400
1SMA16CAT3G RPC 16 2.5 1 7. 8 18.74 19.67 1. 0 26.0 15.4 375
1SMA18CAT3G RTC 18 2.5 20 21.06 22.11 1. 0 29.2 13.7 335
1SMA20CAT3G RVC 20 2.5 22.2 23.37 24.54 1. 0 32.4 12.3 305
1SMA24CAT3G RZC 24 2.5 26.7 28.11 29.51 1. 0 38.9 10.3 260
1SMA26CAT3G SEC 26 2.5 28.9 30.42 31.94 1. 0 42.1 9.5 240
1SMA28CAT3G SGC 28 2.5 31.1 32.74 34.37 1. 0 45.4 8.8 225
1SMA30CAT3G SKC 30 2.5 33.3 35.06 36.81 1. 0 48.4 8.3 210
1SMA33CAT3G SMC 33 2.5 36.7 38.63 40.56 1. 0 53.3 7. 5 190
1SMA36CAT3G SPC 36 2.5 40 42.11 44.21 1. 0 58.1 6.9 175
1SMA40CAT3G SRC 40 2.5 44.4 46.74 49.07 1. 0 64.5 6.2 160
1SMA48CAT3G SXC 48 2.5 53.3 56.11 58.91 1. 0 77.4 5.2 135
1SMA58CAT3G TGC 58 2.5 64.4 67.79 71.18 1. 0 93.6 4.3 115
1SMA60CAT3G TKC 60 2.5 66.7 70.21 73.72 1. 0 96.8 4.1 110
1SMA70CAT3G TPC 70 2.5 77.8 81.90 85.99 1. 0 113 3.5 95
1SMA78CAT3G TTC 78 2.5 86.7 91.27 95.83 1. 0 126 3.2 90
4. 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
5. VBR measured at pulse test current IT at an ambient temperature of 25°C
6. Surge current waveform per Figure 2 and derate per Figure 3
7. Bias voltage = 0 V, F = 1.0 MHz, TJ = 25°C.
†Please see 1SMA5.0AT3 to 1SMA78AT3 for Unidirectional devices.
* Include SZ-prefix devices where applicable.
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/21/18
TVS Diodes
Surface Mount > 400W > 1SMA10CAT3G Series, SZ1SMA10CAT3G Series
Figure 1. Pulse Rating Curve
Ratings and Characteristic Curves
Figure 2. Pulse Waveform
Figure 3. Pulse Derating Curve Figure 4. Dynamic Impedance
NONREPETITIVE
PULSE WAVEFORM
SHOWN IN FIGURE 2
t
1
10
100
0.1 s1 s1 0 s 100 s1 ms 10 ms
0.1
TA = 25°C
PW (ID) IS DEFINED AS THE
POINT WHERE THE PEAK CURRENT
DECAYS TO 50% OF I pp
.
= 10 s
PEAK VALUE
Ippm
HALF VALUE - Ipp
/2
10/1000 s WAVEFORM
AS DEFINED BY R.E.A.
td
120
100
80
60
40
001 23 4
20
5
t, TIME (ms)
Ippm
, PEAK PULSE CURREN T (%)
120
100
80
60
40
0
04 08 01 20 160
TA, AMBIENT TEMPERA TURE (°C)
PEAK PULSE DERATING IN % OF
20
200
PEAK POWER OR CURRENT
10 x 1000 WAVEFORM
AS DEFINED BY R.E.A.
1,000
100
1
11 0 100
BIAS VOLTAGE (VOLTS)
1SMA10CAT3G TJ = 25°C
F = 1 MHz
C, CAPACITANCE (pF)
10
1SMA18CAT3G
1SMA48CAT3G
1SMA78CAT3G
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 05/21/18
TVS Diodes
Surface Mount > 400W > 1SMA10CAT3G Series, SZ1SMA10CAT3G Series
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
Device Package Shipping†
1SMAxxCAT3G SMa
(Pb−Free)
5,000 /
Tape & Reel
SZ1SMAxxCAT3G SMA
(Pb−Free)
5,000 /
Tape & Reel
Dim
Inches Millimeters
Min Nom Max Min Nom Max
A0.078 0.083 0.087 1.97 2.10 2.20
A1 0.002 0.004 0.008 0.05 0.10 0.20
b0.050 0.057 0.064 1.27 1.45 1.63
c0.006 0.011 0.016 0.15 0.28 0.41
D0.090 0.103 0.115 2.29 2.60 2.92
E0.160 0.170 0.18 0 4.06 4.32 4.57
HE0.190 0.205 0.220 4.83 5.21 5.59
L0.030 0.045 0.060 0.76 1. 14 1.52
L1 0.020 REF 0.51 REF
Flow/Wave Soldering (Solder Dipping)
Peak Temperature : 260OC
Dipping Time : 10 seconds
xxC= Device Code (Refer to page 3)
A= Assembly Location
Y= Year
WW = Work Week
xxC
AYWW
4.000
0.157
2.000
0.079
2.000
0.079
mm
inches
SCALE 8:1
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.
