Transient Voltage Suppression Diodes
Surface Mount – 400W > SMAJ series
SMAJ Series
Uni-directional
Description
RoHS
Bi-directional
The SMAJ series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Features
• Excellent clamping
capability
• Typical I
R
less than 1µA
above 12V
• For surface mounted
applications to optimize
board space
• Low profile package
• Typical failure mode is
short from over-specified
voltage or current
• Whisker test is conducted
based on JEDEC
JESD201A per its table 4a
and 4c
• IEC-61000-4-2 ESD
15kV(Air), 8kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2 (IEC801-2)
• EFT protection of data
lines in accordance with
IEC 61000-4-4 (IEC801-4)
• Built-in strain relief
• 400W Peak pulsepower
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
• Fast response time:
typically less than 1.0ps
from 0 Volts to V
BR
min
• Glass passivated junction
• Low inductance
• High temperature
soldering: 260°C/40
seconds at terminals
•
V
BR
@T
J
= V
BR
@25°C × (1+αT
x (T
J
- 25))
(αT: Temperature Coefficient)
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E230531
Maximum Ratings and Thermal Characteristics
(T
A
=25°C unless otherwise noted)
Parameter
Peak Pulse Power Dissipation at
T
A
=25ºC by 10/1000µs Waveform
(Fig.2)(Note 1), (Note 2)
Power Dissipation on Infinite Heat
Sink at T
A
=50°C
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
Maximum Instantaneous Forward
Voltage at 25A for Unidirectional
Only (Note 4)
Operating Junction and Storage
Temperature Range
Typical Thermal Resistance Junction
to Lead
Typical Thermal Resistance Junction
to Ambient
Symbol
P
PPM
P
M(AV)
I
FSM
V
F
T
J
, T
STG
R
uJL
R
uJA
Value
400
3.3
40
3.5V/6.5
-55 to 150
30
120
Unit
W
W
A
V
°C
°C/W
°C/W
• Plastic package has
underwriters laboratory
flammability 94V-O
• Meet MSL level1, per
J-STD-020, LF maximum
peak of 260°C
• Matte tin lead–free Plated
• Halogen free and RoHS
compliant
Applications
TVS devices are ideal for the protection of I/O Interfaces,
V
CC
bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic applications.
Notes:
1. Non-repetitive current pulse, per Fig.4 and derated above T
A
=25ºC per Fig. 3.
2. Mounted on 5.0x5.0mm copper pad to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional
device only.
4. V
F
< 3.5V for V
BR
<
200V and V
F
< 6.5V for V
BR
>
201V.
_
_
Functional Diagram
Additional Information
Bi-directional
Datasheet
Resources
Samples
Cathode
Uni-directional
Anode
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/20/14
Surface Mount – 400W > SMAJ series
Transient Voltage Suppression Diodes
Electrical Characteristics
(T
A
=25°C unless otherwise noted)
Part
Number
(Uni)
SMAJ5.0A
SMAJ6.0A
SMAJ6.5A
SMAJ7
.0A
SMAJ7
.5A
SMAJ8.0A
SMAJ8.5A
SMAJ9.0A
SMAJ10A
SMAJ11A
SMAJ12A
SMAJ13A
SMAJ14A
SMAJ15A
SMAJ16A
SMAJ17A
SMAJ18A
SMAJ20A
SMAJ22A
SMAJ24A
SMAJ26A
SMAJ28A
SMAJ30A
SMAJ33A
SMAJ36A
SMAJ40A
SMAJ43A
SMAJ45A
SMAJ48A
SMAJ51A
SMAJ54A
SMAJ58A
SMAJ60A
SMAJ64A
SMAJ70A
SMAJ75A
SMAJ78A
SMAJ85A
SMAJ90A
SMAJ100A
SMAJ110A
SMAJ120A
SMAJ130A
SMAJ150A
SMAJ160A
SMAJ170A
SMAJ180A
SMAJ200A
SMAJ220A
SMAJ250A
SMAJ300A
SMAJ350A
SMAJ400A
SMAJ440A
Part
Number
(Bi)
SMAJ5.0CA
SMAJ6.0CA
SMAJ6.5CA
SMAJ7
.0CA
SMAJ7
.5CA
SMAJ8.0CA
SMAJ8.5CA
SMAJ9.0CA
SMAJ10CA
SMAJ11CA
SMAJ12CA
SMAJ13CA
SMAJ14CA
SMAJ15CA
SMAJ16CA
SMAJ17CA
SMAJ18CA
SMAJ20CA
SMAJ22CA
SMAJ24CA
SMAJ26CA
SMAJ28CA
SMAJ30CA
SMAJ33CA
SMAJ36CA
SMAJ40CA
SMAJ43CA
SMAJ45CA
SMAJ48CA
SMAJ51CA
SMAJ54CA
SMAJ58CA
SMAJ60CA
SMAJ64CA
SMAJ70CA
SMAJ75CA
SMAJ78CA
SMAJ85CA
SMAJ90CA
SMAJ100CA
SMAJ110CA
SMAJ120CA
SMAJ130CA
SMAJ150CA
SMAJ160CA
SMAJ170CA
SMAJ180CA
SMAJ200CA
SMAJ220CA
SMAJ250CA
SMAJ300CA
SMAJ350CA
SMAJ400CA
SMAJ440CA
Marking
UNI
AE
AG
AK
AM
AP
AR
AT
AV
AX
AZ
BE
BG
BK
BM
BP
BR
BT
BV
BX
BZ
CE
CG
CK
CM
CP
CR
CT
CV
CX
CZ
RE
RG
RK
RM
RP
RR
RT
RV
RX
RZ
SE
SG
SK
SM
SP
SR
ST
SV
SX
SZ
TE
TG
TK
TM
BI
WE
WG
WK
WM
WP
WR
WT
WV
WX
WZ
XE
XG
XK
XM
XP
XR
XT
XV
XX
XZ
YE
YG
YK
YM
YP
YR
YT
YV
YX
YZ
ZE
ZG
ZK
ZM
ZP
ZR
ZT
ZV
ZX
ZZ
VE
VG
VK
VM
VP
VR
VT
VV
VX
VZ
UE
UG
UK
UM
Reverse
Stand off
Voltage V
R
(Volts)
5.0
6.0
6.5
7
.0
7
.5
8.0
8.5
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17
.0
18.0
20.0
22.0
24.0
26.0
28.0
30.0
33.0
36.0
40.0
43.0
45.0
48.0
51.0
54.0
58.0
60.0
64.0
70.0
75.0
78.0
85.0
90.0
100.0
110.0
120.0
130.0
150.0
160.0
170.0
180.0
200.0
220.0
250.0
300.0
350.0
400.0
440.0
Breakdown
Voltage V
BR
(Volts) @ I
T
MIN
6.40
6.67
7
.22
7
.78
8.33
8.89
9.44
10.00
11.10
12.20
13.30
14.40
15.60
16.70
17
.80
18.90
20.00
22.20
24.40
26.70
28.90
31.10
33.30
36.70
40.00
44.40
47
.80
50.00
53.30
56.70
60.00
64.40
66.70
71.10
77
.80
83.30
86.70
94.40
100.00
111.00
122.00
133.00
144.00
167
.00
178.00
189.00
201.00
224.00
246.00
279.00
335.00
391.00
447
.00
492.00
MAX
7
.00
7
.37
7
.98
8.60
9.21
9.83
10.40
11.10
12.30
13.50
14.70
15.90
17
.20
18.50
19.70
20.90
22.10
24.50
26.90
29.50
31.90
34.40
36.80
40.60
44.20
49.10
52.80
55.30
58.90
62.70
66.30
71.20
73.70
78.60
86.00
92.10
95.80
104.00
111.00
123.00
135.00
147
.00
159.00
185.00
197
.00
209.00
222.00
247
.00
272.00
309.00
371.00
432.00
494.00
543.00
Test
Current
I
T
(mA)
10
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Maximum Maximum Maximum
Agency
Clamping
Peak
Reverse
Approval
Voltage V
C
Pulse
Leakage I
R
@ I
pp
Current I
pp
@ V
R
(V)
(A)
(µA)
9.2
10.3
11.2
12.0
12.9
13.6
14.4
15.4
17
.0
18.2
19.9
21.5
23.2
24.4
26.0
27
.6
29.2
32.4
35.5
38.9
42.1
45.4
48.4
53.3
58.1
64.5
69.4
72.7
77
.4
82.4
87
.1
93.6
96.8
103.0
113.0
121.0
126.0
137
.0
146.0
162.0
177
.0
193.0
209.0
243.0
259.0
275.0
292.0
324.0
356.0
405.0
486.0
567
.0
648.0
713.0
43.5
38.8
35.7
33.3
31.0
29.4
27
.8
26.0
23.5
22.0
20.1
18.6
17
.2
16.4
15.4
14.5
13.7
12.3
11.3
10.3
9.5
8.8
8.3
7
.5
6.9
6.2
5.8
5.5
5.2
4.9
4.6
4.3
4.1
3.9
3.5
3.3
3.2
2.9
2.7
2.5
2.3
2.1
1.9
1.6
1.5
1.5
1.4
1.2
1.1
1.0
0.8
0.7
0.6
0.6
800
800
500
200
100
50
20
10
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
For bidirectional type having V
RWM
of 10 volts and less, the I
R
limit is double.
For parts without A (V
BR
is + 10% and V
C
is 5% higher than with A parts).
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/20/14
Transient Voltage Suppression Diodes
Surface Mount – 400W > SMAJ series
I-V Curve Characteristics
Uni-directional
Bi-directional
I
pp
Vc V
BR
V
R
I
R
V
F
I
T
V
Vc V
BR
V
R
I
T
I
R
I
R
I
T
V
R
V
BR
Vc
V
I
pp
I
pp
P
PPM
V
R
V
BR
V
C
I
R
V
F
Peak Pulse Power Dissipation
-- Max power dissipation
Stand-off Voltage
-- Maximum voltage that can be applied to the TVS without operation
Breakdown Voltage
-- Maximum voltage that flows though the TVS at a specified test current (I
T
)
Clamping Voltage
-- Peak voltage measured across the suppressor at a specified Ippm (peak impulse current)
Reverse Leakage Current
-- Current measured at V
R
Forward Voltage Drop for Uni-directional
Ratings and Characteristic Curves
(T
A
=25°C unless otherwise noted)
Figure 1 - TVS Transients Clamping Waveform
Voltage Transients
Figure 2 - Peak Pulse Power Rating Curve
10
Voltage Across TVS
Voltage or Current
P
PPM
-Peak Pulse Power (kW)
Current Through TVS
1
0.2x0.2" (5.0x5.0mm)
0.1
0.000001
Time
Copper Pad Area
0.00001
0.0001
0.001
t
d
-Pulse Width (sec.)
continues on next page.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/20/14
Surface Mount – 400W > SMAJ series
Transient Voltage Suppression Diodes
Ratings and Characteristic Curves
(T
A
=25°C unless otherwise noted)
(Continued)
Figure 3 - Pulse Derating Curve
100
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
80
60
40
20
0
I
PPM
- Peak Pulse Current, % I
RSM
Figure 4 - Pulse Waveform
150
tr=10µsec
Peak Value
IPPM
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
100
Half Value
IPPM
IPPM
2
( )
10/1000µsec. Waveform
as defined by R.E.A
50
0
25
50
75
100
125
150
175
0
td
T
A
-Ambient temperature (ºC)
0
1.0
2.0
t-Time (ms)
3.0
4.0
Figure 5 - Typical Junction Capacitance
10000
Bi-directional V=0V
Figure 6 - Steady State Power Dissipation Derating
Curve
P
M(AV)
, Steady State Power Dissipation (W)
3.6
3.0
2.4
1.8
1.2
0.6
0
0
25
50
75
100 125 150
T
A
- Ambient Temperature (ºC)
175
1000
Uni-directional V=0V
Cj (pF)
Uni-directional @V
R
100
Bi-directional @V
R
10
Tj=25ºC
f=1.0MHz
Vsig=50mVp-p
1
1.0
10.0
100.0
1000.0
V
BR
- Reverse Breakdown Voltage (V)
Figure 7 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
45
I
FSM
- Peak Forward Surve Current
(A)
40
35
30
25
20
15
10
5
0
1
10
Number of Cycles at 60 Hz
100
bargaining
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/20/14
Transient Voltage Suppression Diodes
Surface Mount – 400W > SMAJ series
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Time (min to max) (t
s
)
Lead–free assembly
150°C
200°C
60 – 180 secs
3°C/second max
3°C/second max
217°C
60 – 150 seconds
260
+0/-5
°C
20 – 40 seconds
6°C/second max
8 minutes Max.
280°C
High Temp. Storage
JESD22-A103
JESD22-A108
JESD22-A104
JEDEC-J-STD-020, Level 1
JESD22-A101
JESD22-B106
Temperature (T)
T
P
Ramp-up
t
p
Critical Zone
T
L
to T
P
T
L
T
s(max)
t
L
T
s(min)
Ramp-down
Preheat
t
s
25˚C
t 25˚C to Peak
Time (t)
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Environmental Specifications
Physical Specifications
Weight
Case
Polarity
Terminal
0.002 ounce, 0.061 gram
JEDEC DO-214AC Molded Plastic over
glass passivated junction
Color band denotes cathode except Bipolar
Matte Tin-plated leads, Solderable per
JESD22-B102
HTRB
Temperature Cycling
MSL
H3TRB
RSH
Dimensions
DO-214AC (SMA)
Cathode Band
(for Uni-directional products only)
Dimensions
A
Inches
Min
0.049
0.157
0.100
0.078
0.030
-
0.194
0.006
0.070
0.082
-
0.082
Max
0.065
0.177
0.110
0.090
0.060
0.008
0.208
0.012
-
-
0.090
-
Millimeters
Min
1.250
3.990
2.540
1.980
0.780
-
4.930
0.152
1.800
2.100
-
2.100
Max
1.650
4.500
2.790
2.290
1.520
0.203
5.280
0.305
-
-
2.300
-
A
B
H
D
F
G
J
K
L
C
B
C
D
E
F
G
H
I
J
K
L
E
I
Solder Pads
© 2014 Littelfuse, Inc.
(all dimensions in mm)
Specifications are subject to change without notice.
Revised: 01/20/14
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