Page 1
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 T
■ High power capability at T
– 515 W (10/1000 µs)
■ JEDEC registered package outline
jmax
: 150 °C
jmax
:
SMBJ
Transil™
A
K
Unidirectional Bidirectional
SMB
(JEDEC DO-214AA)
Description
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
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
October 2010 Doc ID 5616 Rev 10 1/10
www.st.com
10
Page 2
Characteristics SMBJ
1 Characteristics
Table 1. Absolute maximum ratings (T
= 25 °C)
amb
Symbol Parameter Value Unit
P
T
T
T
Peak pulse power dissipation
PP
Storage temperature range -65 to +150 °C
stg
Operating junction temperature range -55 to +150 °C
j
Maximum lead temperature for soldering during 10 s. 260 °C
L
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
Table 2. Thermal resistances
(1)
Tj initial = T
amb
600 W
Symbol Parameter Value Unit
R
R
th(j-l)
th(j-a)
Junction to leads 20 °C/W
Junction to ambient on recommended pad layout 100 °C/W
Figure 1. Electrical characteristics - definitions
I
I
I
I
PP
PP
I
I
R
R
I
I
RM
RM
RM
RM
I
I
VRMVBRV
VRMVBRV
RM
RM
I
I
R
R
Bidirectional
I
I
PP
PP
Symbol Parameter
V Stand-off voltage
RM
V Breakdown voltage
BR
V Clamping voltage
CL
I Leakage current @ V
RM RM
I Peak pulse current
PP
T Voltage temperature coefficient
α
V Forward voltage drop
F
R Dynamic resistance
D
Unidirectional
VCLVBRV
VCLVBRV
I
I
I
I
F
F
V
V
V
F
V
RM
RM
F
I
I
RM
RM
I
I
R
R
I
I
PP
PP
VCLVBRV
VCLVBRV
V
V
CL
CL
Figure 2. Pulse definition for electrical characteristics
% Ipp
100
50
0
t
r
2/10 Doc ID 5616 Rev 10
Repetitive pulse current
tr= rise time (µs)
tp= pulse duration time (µs)
t
p
t
Page 3
SMBJ Characteristics
Table 3. Electrical characteristics - parameter values (T
Order code
IRM max@V
RM
VBR @IR
(1)
VCL @IPP
10/1000 µs
= 25 °C)
amb
(2)
RD
10/1000 µs
V
@IPP
CL
8/20 µs
RD
8/20 µs
25 °C 85 °C min typ max max max
µA V V mA V A
(4)
Ω VA
(4)
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
= V
2. To calculate maximum clamping voltage at other surge level,use the following formula: V
3. To calculate V
where I
VBR @ TJ = V
V
@ TJ = V
CL
is the surge current in the application
PPappli
or VCL versus junction temperature, use the following formulas:
BR
@ 25°C x (1 + αT x (TJ – 25))
BR
@ 25°C x (1 + αT x (TJ – 25))
CL
4. Surge capability given for both directions for unidirectional and bidirectional types.
CLmax
- RD x (IPP - I
CL
(2)
αT
(3)
Ω 10-4/ °C
PPappli)
Doc ID 5616 Rev 10 3/10
Page 4
Characteristics SMBJ
0E-03
0E-0
0E+00
Figure 3. Peak pulse power dissipation
Ppp(W)
700
600
500
400
300
200
100
0
0 25 50 75 100 125 150 175
versus initial junction temperature
Tj(°C)
Figure 4. Peak pulse power versus
exponential pulse duration
(T
initial = 25 °C)
j
PPP(kW)
100.0
10.0
1.0
0.1
1.
1.0E-021.
tP(ms)
11.
Tjinitial = 25 °C
1.0E+01
Figure 5. Clamping voltage versus peak pulse current (exponential waveform, maximum values)
(A)
I
1000.0
PP
Tjinitial=25 °C
100.0
10.0
8/20 µ s
10/1000 µ s
1.0
10 ms
SMBJ12A
SMBJ5.0A
SMBJ5.0A
SMBJ12A
SMBJ24A
SMBJ40A
SMBJ24A
SMBJ40A
SMBJ85A
SMBJ85A
SMBJ188A
SMBJ188A
VCL(V)
0.1
1 10 100 1000
4/10 Doc ID 5616 Rev 10
Page 5
SMBJ Characteristics
Figure 6. Junction capacitance versus
reverse applied voltage for
unidirectional types (typical values)
C(pF)
10000
1000
100
SMBJ5.0A
SMBJ12A
SMBJ24A
SMBJ40A
10
VR(V)
SMBJ85A
F=1 MHz
V
=30 mV
osc
Tj=25 °C
SMBJ188A
1 10 100 1000
Figure 8. Peak forward voltage drop
versus peak forward current
(typical values)
IFM(A)
1.0E+02
1.0E+01
Tj=125 °C
Figure 7. Junction capacitance versus
reverse applied voltage for
bidirectional types (typical values)
C(pF)
10000
RMS
SMBJ5.0CA
1000
SMBJ12CA
SMBJ24CA
SMBJ40CA
100
V
SMBJ85CA
F=1 MHz
=30 mV
osc
Tj=25 °C
SMBJ188CA
RMS
VR(V)
10
1 10 100 1000
Figure 9. Relative variation of thermal
impedance, junction to ambient,
versus pulse duration
Z
th(j-a)/Rth(j-a)
1.00
Recommended pad layout
PCB FR4, copper thickness = 35 µm
1.0E+00
Tj=25 °C
1.0E-01
1.0E-02
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Figure 10. Thermal resistance, junction to
ambient, versus copper surface
under each lead
R (°C/W)
th(J-A)
110
100
90
80
70
60
50
40
30
20
10
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
PCB FR4, copper thickness = 35 µm
(cm²)
S
CU
VFM(V)
0.10
0.01
tP(s)
1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03
Figure 11. Leakage current versus junction
temperature (typical values)
IR(nA)
1.E+03
VR=V
RM
VRM<10V
1.E+02
1.E+01
1.E+00
1.E-01
25 50 75 100 125 150
VR=V
VRM≥ 10 V
RM
Tj(°C)
Doc ID 5616 Rev 10 5/10
Page 6
Ordering information scheme SMBJ
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
6/10 Doc ID 5616 Rev 10
Page 7
SMBJ Package information
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
specifications, grade definitions and product status are available at: www.st.com
ECOPACK
Table 4. SMB dimensions
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
.
Dimensions
E1
Ref.
Millimeters Inches
Min. Max. Min. Max.
D
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
E
c 0.15 0.40 0.006 0.016
A1
C
L
A2
b
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
Figure 14. Marking layout
(1)
in mm (inches)
1.62
2.60
(0.064) (0.102)
5.84
1.62
(0.064)
2.18
(0.086)
Cathode bar ( unidirectional devices only )
e: ECOPACK compliance
XXX: Marking
Z: Manufacturing location
Y: Year
WW: week
x x x
y w w
z
e
(0.23)
1. Marking layout can vary according to assembly location.
Doc ID 5616 Rev 10 7/10
Page 8
Package information SMBJ
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
8/10 Doc ID 5616 Rev 10
Page 9
SMBJ Ordering information
4 Ordering information
Table 6. Order codes
Order code Marking Package Weight Base qty Delivery mode
(1)
SMBJxxxA/CA-TR
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
5 Revision history
Table 7. Document revision history
Date Revision Changes
Oct-2001 4 Previous issue
10-Feb-2005 5
Reformatted to current template. Added directional (uni and bi)
indications to graphics. Added ECOPACK statement.
16-Nov-2006 6 Add part numbers SMBJ36A-TR and SMBJ36CA-TR in Ta b le 3 .
14-May-2009 7
Reformatted 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.
Doc ID 5616 Rev 10 9/10
Page 10
SMBJ
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10/10 Doc ID 5616 Rev 10
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