November 2007 Rev 2 1/10
10
SMA6J
High junction temperature Transil™
Features
■Peak pulse power:
– 600 W (10/1000 µs)
– 4 kW (8/20 µs)
■Stand off voltage range: from 5 V to 188 V
■Unidirectional and bidirectional types
■Low clamping voltage versus standard series
■Low leakage current:
– 0.2 µA at 25 °C
– 1 µA at 85 °C
■Operating Tj max: 175 °C
■JEDEC registered package outline
Complies with the following standards
■IEC 61000-4-2 level 4:
– 15 kV (air discharge)
– 8 kV (contact discharge)
■MIL STD 883G-Method 3015-7: class3B
– 25 kV (human body model)
Description
The SMA6J Transil series has been designed to
protect sensitive equipment against electro-static
discharges according to IEC 61000-4-2, MIL STD
883 Method 3015, and electrical over stress such
as IEC 61000-4-4 and 5. They are generally for
surges below 600 W 10/1000 µs.
This planar technology makes it compatible with
high-end equipment and SMPS where low
leakage current and high junction temperature are
required to provide reliability and stability over
time. Their low clamping voltages provides a
better safety margin to protect sensitive circuits
with extended life time expectancy.
Packaged in SMA, this minimizes PCB space
consumption (SMA footprint in accordance with
IPC 7531 standard).
TM: Transil is a trademark of STMicroelectronics
K
A
Unidirectional Bidirectional
SMA
(JEDEC DO-214AC)
www.st.com
Characteristics SMA6J
2/10
1 Characteristics
Table 1. Absolute ratings (Tamb = 25 °C)
Symbol Parameter Value Unit
PPP Peak pulse power dissipation (1) Tj initial = Tamb 600 W
P Power dissipation on infinite heatsink Tamb = 55 °C 4 W
IFSM
Non repetitive surge peak forward current for
unidirectional types
tp = 10 ms
Tj initial = Tamb
60 A
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
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
Table 2. Thermal resistances
Symbol Parameter Value Unit
Rth (j-l) Junction to leads 30 °C/W
Rth (j-a) Junction to ambient on printed circuit on recommended pad layout 120 °C/W
Table 3. Electrical characteristics - definitions (Tamb = 25 °C)
Symbol Parameter
VRM Stand-off voltage
VBR Breakdown voltage
VCL Clamping voltage
IRM
Leakage current
@ VRM
IPP Peak pulse current
αTVoltage temperature
coefficient
VF
Forward voltage
drop
RDDynamic resistance
V
CL
V
BR
V
RM
I
RM
I
R
I
PP
V
I
I
RM
I
R
I
PP
V
RM
V
BR
V
CL
V
CL
V
BR
V
RM
I
RM
I
R
I
PP
V
I
I
RM
I
R
I
PP
V
RM
V
BR
V
CL
VCLVBR VRM
IRM
IR
IPP
V
I
IF
VF
VCLVBR VRM
IRM
IR
IPP
V
I
IF
VF
Unidirectional Bidirectional
SMA6J Characteristics
3/10
Table 4. Electrical characteristics - values (Tamb = 25 °C)
Type
IRM max@VRM V
BR @IR(1) VCL @IPP
10/1000 µs
RD(2)
10/1000 µs
VCL @IPP
8/20 µs
RD(2)
8/20 µs αT(3)
25 °C 85 °C min typ max max max max
µA V V mA V A ΩVA Ω10-4/°C
SMA6J5.0A/CA 20 50 5.0 6.40 6.74 7.07 10 9.1 68 0.029 13.4 298 0.021 5.7
SMA6J6.0A/CA 20 50 6.0 6.70 7.05 7.41 10 9.5 61 0.034 13.7 290 0.022 5.9
SMA6J6.5A/CA 20 50 6.5 7.20 7.58 7.96 10 10.2 56 0.040 14.5 276 0.024 6.1
SMA6J8.5A/CA 20 50 8.5 9.4 9.9 10.4 1 13.3 41.7 0.070 18.7 205 0.041 7.3
SMA6J10A/CA 0.2 1 10 11.1 11.7 12.3 1 15.7 37 0.093 19.6 184 0.040 7.8
SMA6J12A/CA 0.2 1 12 13.3 14.0 14.7 1 18.8 31 0.133 23.5 157 0.056 8.3
SMA6J13A/CA 0.2 1 13 14.4 15.2 15.9 1 20.4 29 0.154 23.9 147 0.054 8.4
SMA6J15A/CA 0.2 1 15 16.7 17.6 18.5 1 23.6 25.1 0.206 27.7 123 0.075 8.8
SMA6J18A/CA 0.2 1 18 20.0 21.1 22.1 1 28.3 21.5 0.288 33.2 102 0.108 9.2
SMA6J20A/CA 0.2 1 20 22.2 23.4 24.5 1 31.4 19.4 0.354 36.8 93 0.132 9.4
SMA6J24A/CA 0.2 1 24 26.7 28.1 29.5 1 37.8 16 0.516 44.3 80 0.184 9.6
SMA6J26A/CA 0.2 1 26 28.9 30.4 31.9 1 40.9 14.9 0.600 47.9 75 0.213 9.7
SMA6J28A/CA 0.2 1 28 31.1 32.7 34.4 1 44.0 13.8 0.697 51.6 68 0.253 9.8
SMA6J33A/CA 0.2 1 33 36.7 38.6 40.6 1 51.9 11.8 0.963 60.8 57 0.356 10.0
SMA6J40A/CA 0.2 1 40 44.4 46.7 49.1 1 62.8 9.7 1.42 73.6 48 0.511 10.1
SMA6J48A/CA 0.2 1 48 53.3 56.1 58.9 1 75.4 8.1 2.04 88.4 40 0.736 10.3
SMA6J58A/CA 0.2 1 58 64.4 67.8 71.2 1 91.1 6.7 2.97 100 33 0.863 10.4
SMA6J70A/CA 0.2 1 70 77.8 81.9 86.0 1 110 5.5 4.38 120 27 1.27 10.5
SMA6J85A/CA 0.2 1 85 94 99 104 1 134 4.6 6.45 146 22.5 1.85 10.6
SMA6J100A/CA 0.2 1 100 111 117 123 1 157 3.8 9.03 172 19 2.58 10.7
SMA6J130A/CA 0.2 1 130 144 152 159 1 204 3 14.9 223 15 4.24 10.8
SMA6J154A/CA 0.2 1 154 171 180 189 1 242 2.4 22.1 265 12.6 6.00 10.8
SMA6J170A/CA 0.2 1 170 189 199 209 1 275 2.2 30.0 292 11.3 7.39 10.8
SMA6J188A/CA 0.2 1 188 209 220 231 1 328 2 48.5 323 10.3 8.97 10.8
1. Pulse test: tp <50ms.
2. To calculate maximum clamping voltage at other surge currents, use the following formula
VCLmax = RD x IPP + VBRmax
3. To calculate VBR versus junction temperature, use the following formula:
VBR @ Tj = VBR @ 25 °C x (1 + αT x (Tj - 25))
100
50
%IPP
trtp
0t
Repetitive peak pulse current
tr = rise time (µs)
tp = pulse duration time (µs)
Characteristics SMA6J
4/10
Figure 3. Clamping voltage versus peak pulse current
(exponential waveform, maximum values)
Figure 1. Peak power dissipation versus
initial junction temperature
Figure 2. Peak pulse power versus
exponential pulse duration
(Tj initial = 25 °C)
0
10
20
30
40
50
60
70
80
90
100
110
0 25 50 75 100 125 150 175 200
%
T (°C)
j
0.1
1.0
10.0
0.01 0.10 1.00 10.00
P (kW)
PP
t (ms)
p
T initial=25°C
j
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1 10 100 1000
IPP(A)
VCL(V)
T = 25°C
j
t = 20 µs
p
t = 1 ms
p
SMA6J5.0A/CA
SMA6J10A/CA
SMA6J15A/CA
SMA6J188A/CA
SMA6J100A/CA
SMA6J48A/CA
SMA6J26A/CA
SMA6J Characteristics
5/10
Figure 4. Junction capacitance versus
reverse applied voltage (typical
values) (SMA6JxxA)
Figure 5. Junction capacitance versus
reverse applied voltage (typical
values) (SMA6JxxCA)
10
100
1000
10000
1 10 100 1000
C(pF)
F=1MHz
V =30mV
T =25°C
OSC RMS
j
V (V)
R
SMA6J5.0A
SMA6J13A
SMA6J26A
SMA6J58A
SMA6J188A
1
10
100
1000
10000
1 10 100 1000
C(pF)
F=1MHz
V =30mV
T =25°C
OSC RMS
j
V (V)
R
SMA6J5.0CA
SMA6J13CA
SMA6J26CA
SMA6J58CA
SMA6J188CA
Figure 6. Peak forward voltage drop versus
peak forward current (typical
values)
Figure 7. Relative variation of thermal
impedance junction to ambient
versus pulse duration (printed
ciruit board FR4, SCu = 1 cm2)
Figure 8. Thermal resistance junction to
ambient versus copper surface
under each lead (printed circuit
board FR4, eCu = 35 µm)
Figure 9. Leakage current versus junction
temperature (typical values)
1.E-02
1.E-01
1.E+00
1.E+01
0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
I (A)
FM
V (V)
FM
T =25°C
j
T =125°C
j
0.01
0.10
1.00
1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03
Zth(j-a)/Rth(j-a)
t (S)
p
40
50
60
70
80
90
100
110
120
130
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Rth(j-a)(°C/W)
S (cm )
CU 2
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
25 50 75 100 125 150 175
I (nA)
R
T (°C)
j
V=
RVRM
V 11.7V
BR≤
V 11.7V
BR>
Ordering information scheme SMA6J
6/10
2 Ordering information scheme
Figure 10. Ordering information scheme
SM A 6J xx CA - TR
Surface Mount
Package
Surge rating
A = SMA package
6J = 600 W
Stand off voltage
example - 85 = 85 V
Type
A = Unidirectional
CA = Bidirectional
Delivery mode
TR = Tape and reel
SMA6J Package information
7/10
3 Package information
●Case: JEDEC DO-214AC molded plastic over Planar junction
●Terminals: Solder plated, solderable per MIL-STD-750, Method 2026
●Polarity: For unidirectional types the band indicates cathode.
●Flammability: Epoxy is rated UL94V-0
●RoHS package
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect . The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
Table 5. SMA dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A1 1.90 2.03 0.075 0.08
A2 0.05 0.20 0.002 0.008
b 1.25 1.65 0.049 0.065
c 0.15 0.40 0.006 0.016
D 2.25 2.90 0.089 0.114
E 4.80 5.35 0.189 0.211
E1 3.95 4.60 0.156 0.181
L 0.75 1.50 0.030 0.059
Figure 11. SMA footprint dimensions Figure 12. Marking information
E
CL
E1
D
A1
A2
b
1.40
(0.055)
1.40
(0.055)
2.63
(0.104)
5.43
(0.214)
1.64
(0.065)
1.40
(0.055)
1.40
(0.055)
2.63
(0.104)
5.43
(0.214)
1.64
(0.065)
milimeters
(inches)
milimeters
(inches)
y w w
e3
z
x x x
e3: ECOPACK (Leadfree)
XXX: Marking
Z: Manufacturing location
Y: Year
WW: week
Cathode bar (unidirectional devices only )
Package information SMA6J
8/10
Table 6. Marking
Type Marking Type Marking
SMA6J5.0A-TR 6UA SMA6J5.0CA-TR 6BA
SMA6J6.0A-TR 6UB SMA6J6.0CA-TR 6BB
SMA6J6.5A-TR 6UC SMA6J6.5CA-TR 6BC
SMA6J8.5A-TR 6UD SMA6J8.5CA-TR 6BD
SMA6J10A-TR 6UE SMA6J10CA-TR 6BE
SMA6J12A-TR 6UF SMA6J12CA-TR 6BF
SMA6J13A-TR 6UG SMA6J13CA-TR 6BG
SMA6J15A-TR 6UH SMA6J15CA-TR 6BH
SMA6J18A-TR 6UJ SMA6J18CA-TR 6BJ
SMA6J20A-TR 6UK SMA6J20CA-TR 6BK
SMA6J24A-TR 6UM SMA6J24CA-TR 6BM
SMA6J26A-TR 6UN SMA6J26CA-TR 6BN
SMA6J28A-TR 6UO SMA6J28CA-TR 6BO
SMA6J33A-TR 6UQ SMA6J33CA-TR 6BQ
SMA6J40A-TR 6UR SMA6J40CA-TR 6BR
SMA6J48A-TR 6US SMA6J48CA-TR 6BS
SMA6J58A-TR 6UT SMA6J58CA-TR 6BT
SMA6J70A-TR 6UU SMA6J70CA-TR 6BU
SMA6J85A-TR 6UV SMA6J85CA-TR 6BV
SMA6J100A-TR 6UW SMA6J100CA-TR 6BW
SMA6J130A-TR 6UX SMA6J130CA-TR 6BX
SMA6J154A-TR 6UY SMA6J154CA-TR 6BY
SMA6J170A-TR 6UZ SMA6J170CA-TR 6BZ
SMA6J188A-TR 6UAA SMA6J188CA-TR 6BAA
SMA6J Ordering information
9/10
4 Ordering information
5 Revision history
Table 7. Ordering information
Order code(1)
1. xx indicates stand-off voltage
Marking Package Weight Base qty Delivery mode
SMA6JxxA-TR See Table 6. SMA 0.068 g 5000 Tape and reel
SMA6JxxCA-TR See Table 6. SMA 0.068 g 5000 Tape and reel
Table 8. Document revision history
Date Revision Changes
21-Feb-2007 1First issue.
07-Nov-2007 2Updated Description. Improved readability of Ordering
information scheme. Reformatted to current standards.
SMA6J
10/10
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