TVS Diodes
Surface Mount – 400W > SMAJ series
SMAJ Series
RoHS
Pb e3
Description
The SMAJ series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Uni-directional
Bi-directional
Agency Approvals
Agency
Agency File Number
E230531
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Symbol
Value
Unit
PPPM
400
W
PPPM
600
W
Power Dissipation on Infinite Heat Sink at
TL=50OC
PD
3.3
W
Peak Forward Surge Current, 8.3ms Single Half
Sine Wave (Note 3)
IFSM
60
A
Maximum Instantaneous Forward Voltage at
25A for Unidirectional Only (Note 4)
VF
3.5/5.0
V
°C
Peak Pulse Power Dissipation at TA=25° by
10/1000us Waveform(Fig.2)(Note 1), (Note 2)
-Single Die Parts
Peak Pulse Power Dissipation at TA=25° by
10/1000us Waveform(Fig.2)(Note 1), (Note
2)-Stacked Die Parts(Note 5)
TJ
-65 to 150
Storage Temperature Range
TSTG
-65 to 175
°C
Typical Thermal Resistance Junction to Lead
RθJL
30
°C/W
Typical Thermal Resistance Junction to Ambient
RθJA
120
°C/W
Operating Temperature Range
Notes:
1. Non-repetitive current pulse, per Fig.4 and derated above TJ (initial) =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. VF < 3.5V for single die parts and VF< 5.0V for stacked-die parts.
5. For stacked die component details, please refer to part numbers labeled by * in Electrical Characteristics.
Functional Diagram
Features
•4
00W Peak pulse power
capability at 10/1000µs
waveform, repetition rate
(duty cycle): 0.01%
•E
xcellent clamping
capability
• Typical IR less than 1μA
when VBR min>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
30kV(Air), 30kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Built-in strain relief
• Fast response time:
typically less than 1.0ps
from 0 Volts to VBR min
• Glass passivated junction
• Low inductance
• High temperature
to reflow soldering
guaranteed: 260°C/30sec
• VBR @ TJ= VBR@25°C
x (1+αT x (TJ - 25))
(αT:Temperature
Coefficient, typical value
is 0.1%)
• Plastic package is
flammability rated V-0 per
Underwriters Laboratories
• Meet MSL level1, per
J-STD-020, LF maximun
peak of 260°C
• Matte tin lead–free Plated
• Halogen free and RoHS
compliant
• Pb-free E3 means 2nd
level interconnect is
Pb-free and the terminal
finish material is tin(Sn)
(IPC/JEDEC J-STD609A.01)
Applications
TVS devices are ideal for the protection of I/O Interfaces,
VCC bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic applications.
Additional Infomarion
Bi-directional
Cathode
Datasheet
Resources
Samples
Anode
Uni-directional
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.10/21/20
TVS Diodes
Surface Mount – 400W > SMAJ series
Electrical Characteristics (T =25°C unless otherwise noted)
A
Part
Number
(Uni)
Part
Number
(Bi)
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
SMAJ188A
SMAJ200A
SMAJ220A
SMAJ250A
SMAJ300A*
SMAJ350A*
SMAJ400A*
SMAJ440A*
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
SMAJ188CA
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
SB
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
VB
VV
VX
VZ
UE
UG
UK
UM
Reverse
Stand off
Voltage VR
(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
188.0
200.0
220.0
220.0
250.0
250.0
300.0
350.0
400.0
440.0
Breakdown
Voltage VBR
(Volts) @ IT
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
209.00
224.00
246.00
246.00
279.00
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
231.00
247.00
272.00
272.00
309.00
309.00
371.00
432.00
494.00
543.00
IT (mA)
Maximum
Clamping
Voltage VC
@ Ipp (V)
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
1
1
1
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
304.0
324.0
356.0
356.0
405.0
405.0
486.0
567.0
648.0
713.0
Test
Current
Maximum Maximum
Reverse
Peak Pulse
Current Ipp Leakage IR@
(A)
VR (µA)
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
1.4
1.2
1.1
1.7
1.0
1.5
1.3
1.1
1.0
0.9
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
1
1
1
Agency
Approval
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
-
Notes:
For bidirectional type having VR of 10 volts and less, the IR limit is double.
For stack-die parts, use * to label the part number.
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.10/21/20
TVS Diodes
Surface Mount – 400W > SMAJ series
I-V Curve Characteristics
Bi-directional
Uni-directional
Ipp
Vc VBR VR
IR VF
IT
IT
IR
Vc VBR VR
V
IR
IT
V
Ipp
Ipp
PPPM
VR
VBR
VC
IR
VF
VR VBR Vc
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 (IT)
Clamping Voltage -- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
Reverse Leakage Current -- Current measured at VR
Forward Voltage Drop for Uni-directional
Ratings and Characteristic Curves (T =25°C unless otherwise noted)
A
Figure 1 - TVS Transients Clamping Waveform
Figure 2 - Peak Pulse Power Rating Curve
Voltage Transients
PPPM-Peak Pulse Power (kW)
100
Voltage or Current
Voltage Across TVS
Current Through TVS
Time
TJ initial = Tamb
10
stacked-die, 600W
at 10/1000µs, 25°C
1
0.1
0.001
Single die,400W
at 10/1000µs, 25°C
0.01
0.1
1
10
td-Pulse Width (ms)
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.10/21/20
TVS Diodes
Surface Mount – 400W > SMAJ series
Ratings and Characteristic Curves (T =25°C unless otherwise noted) (Continued)
A
Figure 3 - Peak Pulse Power Derating Curve
Figure 4 - Pulse Waveform
150
80%
IPPM- Peak Pulse Current, % IRSM
Peak Pluse Power(PPP) or Current(IPP)
Derating in Percentage %
100%
SMF5.0 ~ SMF100
60%
40%
20%
0%
0
25
50
75
100
125
150
tr=10µsec
Peak Value
IPPM
100
Half Value
IPPM IPPM
( )
2
50
0
175
10/1000µsec. Waveform
as defined by R.E.A
td
1.0
0
2.0
3.0
4.0
t-Time (ms)
TJ Initial Junction Temperature(˚C)
Figure 5 - Typical Junction Capacitance
Figure 6 - Typical Transient Thermal Impedance
1000
Transient Thermal Impedance ( °C/W)
10000
Uni-direconal V=0V
1000
Cj (pF)
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
Bi-direconal V=0V
100
Uni/Bi-direconal
V=VR
10
100
10
1
0.1
0.001
1
1
10
100
1000
0.01
0.1
VBR - Reverse Breakdown Voltage (V)
Figure 7 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
IFSM
10
100
1000
Figure 8 - Peak Forward Voltage Drop vs Peak Forward
Current (Typical Values)
100.0
Single die
60
IF - Peak Forward Current (A)
- Peak Forward Surve Current (A)
70
1
TP - Pulse Duration (s)
50
40
30
20
Stacked-die
10.0
1.0
10
0.1
0
1
10
Number of Cycles at 60 Hz
100
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
VF - Peak Forward Voltage (V)
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.10/21/20
TVS Diodes
Surface Mount – 400W > SMAJ series
Soldering Parameters
Lead–free assembly
Pre Heat
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (min to max) (ts)
60 – 120 secs
Average ramp up rate (Liquidus Temp (TL) to peak
3°C/second max
TS(max) to TL - Ramp-up Rate
3°C/second max
Reflow
- Temperature (TL) (Liquidus)
217°C
- Time (min to max) (tL)
60 – 150 seconds
Peak Temperature (TP)
260
Time within 5°C of actual peak Temperature (tp)
30 seconds Max
Ramp-down Rate
6°C/second Max
Time 25°C to peak Temperature (TP)
8 minutes Max.
Do not exceed
260°C
+0/-5
tp
TP
Ramp-up
TL
Temperature (T)
Reflow Condition
Critical Zone
TL to TP
tL
Ts(max)
Ramp-down
Ts(min)
ts
Preheat
°C
25˚C
t 25˚C to Peak
Time (t)
Environmental Specifications
Physical Specifications
Weight
0.002 ounce, 0.061 gram
High Temp. Storage
JESD22-A103
Case
JEDEC DO-214AC Molded Plastic over glass passivated junction
HTRB
JESD22-A108
Polarity
Color band denotes cathode except Bipolar
Temperature Cycling
JESD22-A104
Terminal
Matte Tin-plated leads, Solderable per JESD22-B102
MSL
JEDEC-J-STD-020, Level 1
H3TRB
JESD22-A101
RSH
JESD22-A111
Dimensions
DO-214AC (SMA)
Dimensions
Cathode Band
(for uni-directional products only)
B
H
D
F
E
G
J
K
Millimeters
Max
Min
Max
0.049
0.065
1.250
1.650
B
0.157
0.181
3.990
4.600
C
0.095
0.110
2.400
2.790
D
0.075
0.090
1.900
2.290
E
0.030
0.060
0.780
1.520
F
-
0.008
-
0.203
G
0.189
0.208
4.800
5.280
H
0.006
0.012
0.152
0.305
I
0.070
-
1.800
-
J
0.082
-
2.100
-
K
-
0.090
-
2.300
L
0.082
-
2.100
-
A
C
A
Inches
Min
L
I
Solder Pads
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.10/21/20
TVS Diodes
Surface Mount – 400W > SMAJ series
Part Numbering System
Part Marking System
SMAJ XXX C A
F
Cathode Band
(for uni-directional products only)
XX
5% VBR Voltage Tolerance
YMXXX
Bi-directional
VR Voltage
Series
Littelfuse Logo
Marking Code
Trace Code Marking
Y:Year Code
M: Month Code
XXX: Lot Code
Packaging
Part number
Component Package
Quantity
Packaging Option
Packaging Specification
SMAJ-xxxXX
DO-214AC
5000
Tape & Reel - 12mm tape/13” reel
EIA STD RS-481
Tape and Reel Specification
0.157
(4.0)
Cathode
0.47
(12.0)
0.157
(4.0)
0.059 DIA
(1.5)
Cover tape
13.0 (330)
0.80 (20.2)
Arbor Hole Dia.
0.49
(12.5)
Dimensions are in inches
(and millimeters).
Direction of Feed
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are
not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.10/21/20
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