October 2010 Doc ID 5616 Rev 10 1/10
10
SMBJ
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 leakage current:
– 0.2 µA at 25 °C
– 1 µA at 85 °C
■Operating Tjmax
: 150 °C
■High power capability at Tjmax
:
– 515 W (10/1000 µs)
■JEDEC registered package outline
Complies with the following standards
■IEC 61000-4-2 level 4:
– 15 kV (air discharge)
– 8 kV (contact discharge)
■IEC 61000-4-5
■MIL STD 883G, method 3015-7 Class 3B:
– 25 kV HBM (human body model)
■Resin meets UL 94, V0
■MIL-STD-750, method 2026 soldererability
■EIA STD RS-481 and IEC 60286-3 packing
■IPC 7531 footprint
Description
The SMBJ Transil series has been designed to
protect sensitive equipment against electrostatic
discharges according to IEC 61000-4-2, and
MIL STD 883, method 3015, and electrical over
stress according to IEC 61000-4-4 and 5. These
devices are more generally used against surges
below 600 W (10/1000 μs).
Planar technology makes these devices suitable
for high-end equipment and SMPS where low
leakage current and high junction temperature are
required to provide reliability and stability over
time.
SMBJ are packaged in SMB (SMB footprint in
accordance with IPC 7531 standard).
TM: Transil is a trademark of STMicroelectronics
K
A
Unidirectional Bidirectional
SMB
(JEDEC DO-214AA)
www.st.com
Characteristics SMBJ
2/10 Doc ID 5616 Rev 10
1 Characteristics
Figure 1. Electrical characteristics - definitions
Figure 2. Pulse definition for electrical characteristics
Table 1. Absolute maximum ratings (Tamb = 25 °C)
Symbol Parameter Value Unit
PPP Peak pulse power dissipation (1) Tj initial = Tamb 600 W
Tstg Storage temperature range -65 to +150 °C
TjOperating junction temperature range -55 to +150 °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 20 °C/W
Rth(j-a) Junction to ambient on recommended pad layout 100 °C/W
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
V
CL
V
BR
V
RM
I
RM
I
R
I
PP
V
I
I
F
V
F
V
CL
V
BR
V
RM
I
RM
I
R
I
PP
V
I
I
F
V
F
Unidirectional
Bidirectional
Symbol Parameter
V Stand-off voltage
V Breakdown voltage
V Clamping voltage
I Leakage current @ V
I Peak pulse current
T Voltage temperature coefficient
V Forward voltage drop
R Dynamic resistance
RM
BR
CL
RM RM
PP
F
D
α
Repetitive pulse current
tr= rise time (µs)
tp= pulse duration time (µs)
tp
t
tr
% Ipp
100
50
0
SMBJ Characteristics
Doc ID 5616 Rev 10 3/10
Table 3. Electrical characteristics - parameter values (Tamb = 25 °C)
Order code
IRM max@VRM VBR @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
µA V V mA V A(4) ΩVA
(4) Ω10-4/ °C
SMBJ5.0A/CA 20 50 5.0 6.4 6.74 10 9.2 68 0.031 13.4 298 0.021 5.7
SMBJ6.0A/CA 20 50 6.0 6.7 7.05 10 10.3 61 0.048 13.7 290 0.022 5.9
SMBJ6.5A/CA 20 50 6.5 7.2 7.58 10 11.2 56 0.058 14.5 276 0.024 6.1
SMBJ8.5A/CA 20 50 8.5 9.4 9.9 1 14.4 41.7 0.096 19.5 205 0.044 7.3
SMBJ10A/CA 0.2 1 10 11.1 11.7 1 17 37 0.127 21.7 184 0.051 7.8
SMBJ12A/CA 0.2 1 12 13.3 14 1 19.9 31 0.168 25.3 157 0.068 8.3
SMBJ13A/CA 0.2 1 13 14.4 15.2 1 21.5 29 0.191 27.2 147 0.076 8.4
SMBJ15A/CA 0.2 1 15 16.7 17.6 1 24.4 25.1 0.236 32.5 123 0.114 8.8
SMBJ16A/CA 0.2 1 16 17.8 18.7 1 26 23.1 0.276 34.4 116 0.127 8.8
SMBJ18A/CA 0.2 1 18 20.0 21.1 1 29.2 21.5 0.328 39.3 102 0.168 9.2
SMBJ20A/CA 0.2 1 20 22.2 23.4 1 32.4 19.4 0.404 42.8 93 0.196 9.4
SMBJ22A/CA 0.2 1 22 24.4 25.7 1 35.5 17.7 0.481 48.3 83 0.257 9.6
SMBJ24A/CA 0.2 1 24 26.7 28.1 1 38.9 16 0.587 50 80 0.256 9.6
SMBJ26A/CA 0.2 1 26 28.9 30.4 1 42.1 14.9 0.683 53.5 75 0.288 9.7
SMBJ28A/CA 0.2 1 28 31.1 32.7 1 45.4 13.8 0.802 59 68 0.363 9.8
SMBJ30A/CA 0.2 1 30 33.3 35.1 1 48.4 13 0.888 64.3 62 0.443 9.9
SMBJ33A/CA 0.2 1 33 36.7 38.6 1 53.3 11.8 1.08 69.7 57 0.512 10.0
SMBJ36A/CA 0.2 1 36 40.0 42.1 1 58.1 10.3 1.35 76 52 0.611 10.0
SMBJ40A/CA 0.2 1 40 44.4 46.7 1 64.5 9.7 1.59 84 48 0.728 10.1
SMBJ48A/CA 0.2 1 48 53.3 56.1 1 77.4 8.1 2.28 100 40 1.03 10.3
SMBJ58A/CA 0.2 1 58 64.4 67.8 1 93.6 6.7 3.34 121 33 1.51 10.4
SMBJ70A/CA 0.2 1 70 77.8 81.9 1 113 5.5 4.91 146 27 2.22 10.5
SMBJ85A/CA 0.2 1 85 94 99 1 137 4.6 7.18 178 22.5 3.29 10.6
SMBJ100A/CA 0.2 1 100 111 117 1 162 3.8 10.3 212 19 4.69 10.7
SMBJ130A/CA 0.2 1 130 144 152 1 209 3 16.5 265 15 7.03 10.8
SMBJ154A/CA 0.2 1 154 171 180 1 246 2.4 23.8 317 12.6 10.2 10.8
SMBJ170A/CA 0.2 1 170 189 199 1 275 2.2 30.0 353 11.3 12.7 10.8
SMBJ188A/CA 0.2 1 188 209 220 1 328 2 48.5 388 10.3 15.2 10.8
1. Pulse test : tp < 50 ms
2. To calculate maximum clamping voltage at other surge level,use the following formula: VCLmax = VCL - RD x (IPP - IPPappli)
where IPPappli is the surge current in the application
3. To calculate VBR or VCL versus junction temperature, use the following formulas:
VBR @ TJ = VBR @ 25°C x (1 + αT x (TJ – 25))
VCL @ TJ = VCL @ 25°C x (1 + αT x (TJ – 25))
4. Surge capability given for both directions for unidirectional and bidirectional types.
Characteristics SMBJ
4/10 Doc ID 5616 Rev 10
Figure 5. Clamping voltage versus peak pulse current (exponential waveform, maximum values)
Figure 3. Peak pulse power dissipation
versus initial junction temperature
Figure 4. Peak pulse power versus
exponential pulse duration
(Tj initial = 25 °C)
0
100
200
300
400
500
600
700
0 25 50 75 100 125 150 175
P
pp
(W)
Tj(°C)
0.1
1.0
10.0
100.0
1.
0
E-
03
1.
0
E-
0
21.
0
E-
0
11.
0
E+
00
1.
0
E+
0
1
P
PP
(kW)
T
j
initial = 25 °C
t
P
(ms)
IPP(A)
0.1
1.0
10.0
100.0
1000.0
1 10 100 1000
10/1000 µs
Tjinitial=25 °C
8/20 µs
10 ms
SMBJ5.0A
SMBJ188A
SMBJ12A
SMBJ24A
SMBJ40A
SMBJ85A
SMBJ5.0A
SMBJ188A
SMBJ12A
SMBJ24A
SMBJ40A
SMBJ85A
VCL
(V)
SMBJ Characteristics
Doc ID 5616 Rev 10 5/10
Figure 6. Junction capacitance versus
reverse applied voltage for
unidirectional types (typical values)
Figure 7. Junction capacitance versus
reverse applied voltage for
bidirectional types (typical values)
10
100
1000
10000
1 10 100 1000
C(pF)
F=1 MHz
V
osc
=30 mV
RMS
T
j
=25 °C
SMBJ5.0A
SMBJ12A
SMBJ24A
SMBJ40A
SMBJ85A
SMBJ188A
VR(V)
10
100
1000
10000
1 10 100 1000
C(pF)
F=1 MHz
Vosc=30 mVRMS
Tj=25 °C
SMBJ5.0CA
SMBJ12CA
SMBJ24CA
SMBJ40CA
SMBJ85CA
SMBJ188CA
VR(V)
Figure 8. Peak forward voltage drop
versus peak forward current
(typical values)
Figure 9. Relative variation of thermal
impedance, junction to ambient,
versus pulse duration
Figure 10. Thermal resistance, junction to
ambient, versus copper surface
under each lead
Figure 11. Leakage current versus junction
temperature (typical values)
I
FM
(A)
1.0E-02
1.0E-01
1.0E+00
1.0E+01
1.0E+02
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Tj=25 °C
Tj=125 °C
VFM(V)
0.01
0.10
1.00
1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03
Z
th(j-a)
/R
th(j-a)
tP(s)
Recommended pad layout
PCB FR4, copper thickness = 35 µm
0
10
20
30
40
50
60
70
80
90
100
110
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
R (°C/W)
th(J-A)
SCU(cm²)
PCB FR4, copper thickness = 35 µm
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
25 50 75 100 125 150
VR=VRM
VRM ≥10 V
VR=VRM
VRM <10V
Tj(°C)
I
R
(nA)
Ordering information scheme SMBJ
6/10 Doc ID 5616 Rev 10
2 Ordering information scheme
Figure 12. Ordering information scheme
SM B J 85 CA - TR
Surface mount
Peak pulse power
B = 600 W Transil in SMB
Stand off voltage
85 = 85 V
Type
A = Unidirectional
CA = Bidirectional
Delivery mode
TR = Tape and reel
SMBJ Package information
Doc ID 5616 Rev 10 7/10
3 Package information
●Case: JEDEC DO-214AA 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 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.
Table 4. SMB dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A1 1.90 2.45 0.075 0.096
A2 0.05 0.20 0.002 0.008
b 1.95 2.20 0.077 0.087
c 0.15 0.40 0.006 0.016
D 3.30 3.95 0.130 0.156
E 5.10 5.60 0.201 0.220
E1 4.05 4.60 0.159 0.181
L 0.75 1.50 0.030 0.059
Figure 13. Footprint dimensions
in mm (inches)
Figure 14. Marking layout(1)
1. Marking layout can vary according to assembly location.
E
C
L
E1
D
A1
A2
b
2.60
5.84
1.62
2.18
1.62
(0.064) (0.102)
(0.23)
(0.064)
(0.086)
y w w
e
z
x x x
e: ECOPACK compliance
XXX: Marking
Z: Manufacturing location
Y: Year
WW: week
Cathode bar ( unidirectional devices only )
Package information SMBJ
8/10 Doc ID 5616 Rev 10
Table 5. Marking
Order code Marking Order code Marking
SMBJ5.0A-TR BUZ SMBJ5.0CA-TR BBZ
SMBJ6.0A-TR BUA SMBJ6.0CA-TR BBA
SMBJ6.5A-TR BUB SMBJ6.5CA-TR BBB
SMBJ8.5A-TR BUC SMBJ8.5CA-TR BBC
SMBJ10A-TR BUD SMBJ10CA-TR BBD
SMBJ12A-TR BUE SMBJ12CA-TR BBE
SMBJ13A-TR BUF SMBJ13CA-TR BBF
SMBJ15A-TR BUG SMBJ15CA-TR BBG
SMBJ16A-TR CUG SMBJ16CA-TR CBG
SMBJ18A-TR BUH SMBJ18CA-TR BBH
SMBJ20A-TR BUI SMBJ20CA-TR BBI
SMBJ22A-TR BVA SMBJ22CA-TR CBH
SMBJ24A-TR BUJ SMBJ24CA-TR BBJ
SMBJ26A-TR BUK SMBJ26CA-TR BBK
SMBJ28A-TR BUL SMBJ28CA-TR BBL
SMBJ30A-TR BUM SMBJ30CA-TR BBM
SMBJ33A-TR BUN SMBJ33CA-TR BBN
SMBJ36A-TR CUN SMBJ36CA-TR CBN
SMBJ40A-TR CUJ SMBJ40CA-TR CBJ
SMBJ43A-TR CUW SMBJ43CA-TR CBW
SMBJ48A-TR BUW SMBJ48CA-TR BBW
SMBJ58A-TR BUO SMBJ58CA-TR BBO
SMBJ70A-TR CUM SMBJ70CA-TR CBM
SMBJ85A-TR BUQ SMBJ85CA-TR BBQ
SMBJ100A-TR CUQ SMBJ100CA-TR CBQ
SMBJ130A-TR BUS SMBJ130CA-TR BBS
SMBJ154A-TR BUT SMBJ154CA-TR BBT
SMBJ170A-TR BUU SMBJ170CA-TR BBU
SMBJ188A-TR BUV SMBJ188CA-TR BBV
SMBJ Ordering information
Doc ID 5616 Rev 10 9/10
4 Ordering information
5 Revision history
Table 6. Order codes
Order code Marking Package Weight Base qty Delivery mode
SMBJxxxA/CA-TR(1)
1. Where xxx is nominal value of VBR and A or CA indicates unidirectional or bidirectional version. See
Table 3 for list of available devices and their order codes
See Table 5 on page 8 SMB 0.11 g 2500 Tape and reel
Table 7. Document revision history
Date Revision Changes
Oct-2001 4Previous issue
10-Feb-2005 5Reformatted to current template. Added directional (uni and bi)
indications to graphics. Added ECOPACK statement.
16-Nov-2006 6Add part numbers SMBJ36A-TR and SMBJ36CA-TR in Ta ble 3.
14-May-2009 7Reformatted to current standards. Updated ECOPACK
statement. Added part number SMBJ43CA/A
17-Sep-2009 8 Document updated for low leakage current.
09-Jul-2010 9 Changed timescale in Figure 9.
20-Oct-2010 10 Updated Figure 13.
SMBJ
10/10 Doc ID 5616 Rev 10
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