Features
• AEC-Q101 qualified
• Peak pulse power: 400 W (10/1000 μs) and 2.5 kW (8/20 μs)
• Flat and thin package: 1 mm
• Stand-off voltage range from 5 V to 188 V
• Unidirectional type
• Low leakage current: 0.2 μA at 25 °C and 1 μA at 85 °C
• Operating Tj max: 175 °C
• High power capability at Tj max.: up to 200 W (10/1000 µs)
• Lead finishing: matte tin plating
Complies with the following standards
• UL94, V0
• J-STD-020 MSL level 1
• J-STD-002, JESD 22-B102 E3 and MIL-STD-750, method 2026
• JESD-201 class 2 whisker test
• IPC7531 footprint and JEDEC registered package outline
• IEC 61000-4-4 level 4:
– 4 kV
• ISO10605, IEC 61000-4-2, C = 150 pF - R = 330 Ω exceeds level 4:
– 30 kV (contact discharge)
– 30 kV (air discharge)
• ISO10605, C = 330 pF, R = 330 Ω exceeds level 4:
– 30 kV (contact discharge)
– 30 kV (air discharge)
• ISO7637-2 (Not applicable to parts with VRM lower than battery voltage)
– Pulse 1: VS = -150 V
– Pulse 2a: VS = +112 V
– Pulse 3a: VS = -220 V
– Pulse 3b: VS = +150 V
Description
The SMA4FY Transil series are designed to protect sensitive automotive circuits
against surges defined in ISO 7637 series and against electrostatic discharges
according to ISO 10605.
The Planar technology makes it compatible with high-end circuits where low leakage
current and high junction temperature are required to provide long term reliability and
stability.
Product status link
SM4FY
SMA4F5.0AY, SMA4F6.0AY,
SMA4F6.5AY, SMA4F8.5AY,
SMA4F10AY, SMA4F11AY,
SMA4F12AY, SMA4F13AY,
SMA4F14AY, SMA4F15AY,
SMA4F16AY, SMA4F18AY,
SMA4F20AY, SMA4F22AY,
SMA4F23AY, SMA4F24AY,
SMA4F26AY, SMA4F28AY,
SMA4F30AY, SMA4F31AY,
SMA4F33AY, SMA4F36AY,
SMA4F40AY, SMA4F48AY,
SMA4F58AY, SMA4F64AY,
SMA4F70AY, SMA4F85AY,
SMA4F100AY, SMA4F130AY,
SMA4F154AY, SMA4F170AY,
SMA4F188AY
Automotive 400 W TVS in SMA Flat
SMA4FxxAY
Datasheet
DS12492 - Rev 3 - August 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
1Characteristics
Table 1. Absolute maximum ratings (Tamb = 25 °C)
Symbol Parameter Value Unit
VPP Peak pulse voltage
ISO10605 (C = 330 pF, R = 330 Ω):
Contact discharge
Air discharge
30
30
kV
ISO10605 / IEC 61000-4-2 (C = 150 pF, R = 330 Ω)
Contact discharge
Air discharge
30
30
PPP Peak pulse power dissipation 10/1000 µs, Tj initial = Tamb 400 W
Tstg Storage temperature range -65 to +175 °C
TjOperating junction temperature range -55 to +175 °C
TLMaximum lead temperature for soldering during 10 s 260 °C
Figure 1. Electrical characteristics - parameter definitions
Figure 2. Pulse definition for electrical characteristics
SMA4FxxAY
Characteristics
DS12492 - Rev 3 page 2/15
Table 2. Electrical characteristics - parameter values (Tamb = 25 °C, unless otherwise specified)
Type
IRM max at VRM VBR at IR (1)
10 / 1000 µs 8 / 20 µs αT
VCL(2)(3) IPP(4) RDVCL(2)(3) IPP(4) RD
25 °C 85 °C Min. Typ. Max. Max. Max. Max. Max. Max.
µA V V mA V A(4) Ω V A(4) Ω10-4/°C
SMA4F5.0AY 20 50 5.0 6.4 6.74 7.1 10 9.2 43.5 0.048 13.4 174 0.036 5.7
SMA4F6.0AY 20 50 6.0 6.7 7.05 7.4 10 10.3 38.8 0.075 13.7 170 0.037 5.9
SMA4F6.5AY 20 50 6.5 7.2 7.58 8 10 11.2 35.7 0.09 14.5 160 0.041 6.1
SMA4F8.5AY 20 50 8.5 9.4 9.9 10.4 1 14.4 27.7 0.144 19.5 124 0.073 7.3
SMA4F10AY 0.2 1 10 11.1 11.7 12.3 1 17 23.5 0.2 21.7 106 0.089 7.8
SMA4F11AY 0.2 1 11 12.3 13 13.7 1 18 21.8 0.216 24.2 96 0.11 8.1
SMA4F12AY 0.2 1 12 13.3 14 14.7 1 19.9 20.1 0.259 25.3 91 0.116 8.3
SMA4F13AY 0.2 1 13 14.4 15.2 16 1 21.5 18.6 0.296 27.2 85 0.132 8.4
SMA4F14AY 0.2 1 14 15.7 16.5 17.3 1 23.1 17.2 0.337 29 79 0.148 8.6
SMA4F15AY 0.2 1 15 16.7 17.6 18.5 1 24.4 16.4 0.36 32.5 71 0.197 8.8
SMA4F16AY 0.2 1 16 17.9 18.8 19.8 1 26 15.4 0.403 34.7 67 0.222 9.0
SMA4F18AY 0.2 1 18 20 21.1 22.2 1 29.2 13.7 0.511 39.3 59 0.29 9.2
SMA4F20AY 0.2 1 20 22.2 23.4 24.6 1 32.4 12.3 0.634 42.8 54 0.337 9.4
SMA4F22AY 0.2 1 22 24.4 25.7 27 1 35.5 11.2 0.759 48.3 48 0.444 9.6
SMA4F23AY 0.2 1 23 25.7 27 28.4 1 37.8 10.6 0.888 49.2 47 0.444 9.6
SMA4F24AY 0.2 1 24 26.7 28.1 29.5 1 38.9 10.3 0.913 50 46 0.446 9.6
SMA4F26AY 0.2 1 26 28.9 30.4 31.9 1 42.1 9.5 1.07 53.5 43 0.502 9.7
SMA4F28AY 0.2 1 28 31.1 32.7 34.3 1 45.4 8.8 1.26 59 39 0.633 9.8
SMA4F30AY 0.2 1 30 33.2 35 36.8 1 48.4 8.3 1.39 64.3 36 0.761 9.9
SMA4F31AY 0.2 1 31 34.2 36 37.8 1 50.2 8 1.56 65 35 0.77 9.9
SMA4F33AY 0.2 1 33 36.7 38.6 40.5 1 53.3 7.5 1.71 69.7 33 0.885 10
SMA4F36AY 0.2 1 36 40 42.1 44.2 1 58.1 6.9 2.01 76 30 1.06 10
SMA4F40AY 0.2 1 40 44.4 46.7 49 1 64.5 6.2 2.5 84 27 1.3 10.1
SMA4F48AY 0.2 1 48 53.2 56 58.8 1 77.4 5.2 3.56 100 23 1.79 10.3
SMA4F58AY 0.2 1 58 64.6 68 71.4 1 93.6 4.3 5.21 121 19 2.62 10.4
SMA4F64AY 0.2 1 64 71.1 74.8 78.6 1 103 3.9 6.25 134 17 3.25 10.5
SMA4F70AY 0.2 1 70 77.9 82 86.1 1 113 3.5 7.71 146 16 3.75 10.5
SMA4F85AY 0.2 1 85 95 100 105 1 137 2.9 11.4 178 13 5.69 10.6
SMA4F100AY 0.2 1 100 111 117 123 1 162 2.5 15.6 212 11 8.09 10.7
SMA4F130AY 0.2 1 130 144 152 160 1 209 1.9 25.8 265 9 11.7 10.8
SMA4F154AY 0.2 1 154 171 180 189 1 246 1.6 35.6 317 7 18.3 10.8
SMA4F170AY 0.2 1 170 190 200 210 1 275 1.4 47 353 6.5 22.2 10.8
SMA4F188AY 0.2 1 188 209 220 231 1 328 1.4 69.3 388 6 26.2 10.8
1. To calculate VBR versus Tj: VBR at TJ = VBR at 25 °C x (1 + αT x (Tj - 25))
2. To calculate VCLmax versus IPPappli: VCLmax = VBR max + RD x IPPappli
3. To calculate VCL versus Tj: VCL at TJ = VCL at 25 °C x (1 + αT x (Tj - 25))
SMA4FxxAY
Characteristics
DS12492 - Rev 3 page 3/15
4. Surge capability given for both directions
1.1 Characteristics (curves)
Figure 3. Maximum peak power dissipation versus initial
junction temperature
0
100
200
300
400
500
0 25 50 75 100 125 150 175 200
Ppp (W)
Tj (°C)
VRM ≥100V
VRM < 100V
10/1000 µs
Figure 4. Maximum peak pulse power versus exponential
pulse duration
10
100
1000
10000
0.01 0.1 1 10
Ppp (W)
tp (ms)
Tjinitial = 25 °C
Figure 5. Maximum clamping voltage versus peak pulse
current
0.1
1
10
100
1000
1 10 100 1000
Ipp (A)
VCL (V)
8/20 µs
10/1000 µs
SMA4F5.0AY
SMA4F33AY
SMA4F70AY
SMA4F188AY
Figure 6. Dynamic resistance versus pulse duration
0.01
0.1
1
10
100
1000
0.01 0.1 1 10
RD(Ω)
tp (ms)
SMA4F5.0AY
SMA4F33AY
SMA4F70AY
SMA4F188AY
SMA4FxxAY
Characteristics (curves)
DS12492 - Rev 3 page 4/15
Figure 7. Junction capacitance versus reverse applied
voltage (unidirectional types)
0.01
0.1
1
10
1 10 100 1000
C (nF)
V
R (V)
SMA4F5.0AY
SMA4F33AY
SMA4F70AY
SMA4F188AY
f = 1 MHz
Vosc = 30mVRMS
Tj = 25 °C
Figure 8. Leakage current versus junction temperature
1
10
100
1000
10000
25 50 75 100 125 150 175
IR(nA)
Tj (°C)
VR= VRM
VRM < 10V
VRM ≥ 10V
Figure 9. Peak forward voltage drop versus peak forward
current
0
1
10
100
0 0.5 1 1.5 2 2.5 3 3.5
IF(A)
VF (V)
single pulse
Tj = 25 °C
Tj = 175 °C
Figure 10. Thermal impedance junction to ambient versus
pulse duration
1
10
100
1000
0.01 0.1 1 10 100 1000
Zth(j-a) (°C/W)
tp (s)
Single pulse on recommended footprint.
Epoxy printed circuit board FR4, 70 µm Cu thickness
Figure 11. Thermal resistance junction to ambient versus
copper area under each lead
0
20
40
60
80
100
120
140
160
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Rth(j-a) (°C/W)
SCu (cm²)
Single pulse on recommended footprint.
Epoxy printed circuit board FR4, 70 µm Cu thickness
Figure 12. ISO7637-2 pulse 1: Vs = -150 V with 12 V
battery
SMA4FxxAY
Characteristics (curves)
DS12492 - Rev 3 page 5/15
Figure 13. ISO7637-2 pulse 2a: Vs = +112 V with 12 V
battery Figure 14. ISO7637-2 pulse 3a: Vs = -220 V with 12 V
battery
Figure 15. ISO7637-2 pulse 3b: Vs = +150 V with 12 V battery
SMA4FxxAY
Characteristics (curves)
DS12492 - Rev 3 page 6/15
2Package information
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages,
depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product
status are available at: www.st.com. ECOPACK is an ST trademark.
2.1 SMA Flat package information
Figure 16. SMA Flat package outline
Table 3. SMA Flat mechanical data
Symbol
Millimeters Inches(1)
Min Typ Max Min Typ Max
A 0.90 1.10 0.035 0.044
A1 0.05 0.002
b 1.25 1.65 0.049 0.065
c 0.15 0.40 0.005 0.016
D 2.25 2.90 0.088 0.115
E 5.00 5.35 0.196 0.211
E1 3.95 4.60 0.155 0.182
G 2.00 0.079
G1 0.85 0.033
L 0.75 1.20 0.029 0.048
L1 0.45 0.018
L2 0.45 0.018
L3 0.05 0.002
V 8° 8°
V1 8° 8°
1. Values in inches are converted from mm and rounded to 3 decimal digits.
SMA4FxxAY
Package information
DS12492 - Rev 3 page 7/15
Figure 17. SMA Flat recommended footprint in mm
(inches) Figure 18. SMA Flat marking
Figure 19. Package orientation in reel Figure 20. Tape and reel orientation
Figure 21. 13'' reel dimension values Figure 22. Inner box dimension values
SMA4FxxAY
SMA Flat package information
DS12492 - Rev 3 page 8/15
Figure 23. Tape outline
Table 4. Tape dimension values
Ref.
Dimensions
Millimeters
Min. Typ. Max.
D0 1.5 1.55 1.6
D1 1.5
F 5.4 5.5 5.6
K0 1.1 1.2 1.3
P0 3.9 4.0 4.1
P1 3.9 4.0 4.1
P2 1.9 2.0 2.1
W 11.7 12 12.3
SMA4FxxAY
SMA Flat package information
DS12492 - Rev 3 page 9/15
2.2 Reflow profile
Figure 24. ST ECOPACK recommended soldering reflow profile for PCB mounting
250
0
50
100
150
200
240210180150120906030 300270
-6 °C/s
240-245 °C
2 - 3 °C/s
Temperature (°C) -2 °C/s
-3 °C/s
Time (s)
0.9 °C/s
60 sec
(90 max)
Note: Minimize air convection currents in the reflow oven to avoid component movement. Maximum soldering profile
corresponds to the latest IPC/JEDEC J-STD-020.
SMA4FxxAY
Reflow profile
DS12492 - Rev 3 page 10/15
3Application and design guidelines
More information is available in the application note AN2689 “Protection of automotive electronics from electrical
hazards, guidelines for design and component selection”.
SMA4FxxAY
Application and design guidelines
DS12492 - Rev 3 page 11/15
4Ordering information
Figure 25. Ordering information scheme
SMA 4 F vv A Y
Package:
SMA
Power capability (10 / 1000 µs):
400 W
Flat package
Stand-off voltage:
VRM
Type:
A : unidirectional
Automotive grade
Table 5. Ordering information
Order code Marking Package Weight Base qty. Delivery mode
SMA4FxxxAY See Table 6. Marking. SMA Flat 39 mg 10000 Tape and reel
SMA4FxxAY
Ordering information
DS12492 - Rev 3 page 12/15
4.1 Marking
Table 6. Marking
Order code Marking
SMA4F5.0AY 4AIY
SMA4F6.0AY 4AKY
SMA4F6.5AY 4ALY
SMA4F8.5AY 4APY
SMA4F10AY 4ASY
SMA4F11AY 4AUY
SMA4F12AY 4AWY
SMA4F13AY 4AYY
SMA4F14AY 4BAY
SMA4F15AY 4BCY
SMA4F16AY 4BEY
SMA4F18AY 4BIY
SMA4F20AY 4BMY
SMA4F22AY 4BOY
SMA4F23AY 4BPY
SMA4F24AY 4BQY
SMA4F26AY 4BSY
SMA4F28AY 4BUY
SMA4F30AY 4BWY
SMA4F31AY 4BXY
SMA4F33AY 4BZY
SMA4F36AY 4CCY
SMA4F40AY 4CGY
SMA4F48AY 4COY
SMA4F58AY 4CYY
SMA4F64AY 4DEY
SMA4F70AY 4DKY
SMA4F85AY 4DZY
SMA4F100AY 4EOY
SMA4F130AY 4FSY
SMA4F154AY 4GQY
SMA4F170AY 4HGY
SMA4F188AY 4HYY
SMA4FxxAY
Marking
DS12492 - Rev 3 page 13/15
Revision history
Table 7. Document revision history
Date Version Changes
01-Oct-2018 1 Initial release.
28-Feb-2019 2 Updated links syntax.
26-Aug-2019 3
Updated Table 1. Absolute maximum ratings (Tamb = 25 °C),
Figure 10. Thermal impedance junction to ambient versus pulse duration and
Figure 11. Thermal resistance junction to ambient versus copper area under
each lead.
SMA4FxxAY
DS12492 - Rev 3 page 14/15
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SMA4FxxAY
DS12492 - Rev 3 page 15/15
