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SMAJ SERIES
400 Watts Suface Mount Transient Voltage Suppressor
SMA/DO-214AC
Pb
RoHS
COMPLIANCE
Features
UL Recognized File # E-326243
For surface mounted application
Low profile package
Built-in strain relief
Glass passivated junction
Excellent clamping capability
Fast response time: Typically less than 1.0ps from
0 volt to BV min
Typical I
R
less than 1uA above 10V
High temperature soldering guaranteed:
260℃ / 10 seconds at terminals
Plastic material used carried Underwriters
Laboratory Flammability Classification 94V-0
400 watts peak pulse power capability with a 10 /
1000 us waveform (300W above 78V)
Green compound with suffix "G" on packing
code & prefix "G" on datecode
Mechanical Data
Case: Molded plastic
Terminals: Pure tin plated, lead free
Polarity: Indicated by cathode band
Packaging: 12mm tape per EIA Std RS-481
Weight: 0.064 gram
Dimensions in inches and (millimeters)
Marking Diagram
XX
G
Y
M
= Specific Device Code
= Green Compound
= Year
= Work Month
Maximum Ratings and Electrical Characteristics
Rating at 25
℃
ambient temperature unless otherwise specified.
Type Number
Peak Power Dissipation at T
A
=25℃, Tp=1ms(Note 1)
Steady State Power Dissipation
Peak Forward Surge Current, 8.3ms Single Half
Sine-wave Superimposed on Rated Load
(JEDEC method) (Note 2, 3)
Maximum Instantaneous Forward Voltage at 25.0A for
Unidirectional Only
Operating and Storage Temperature Range
Symbol
P
PK
P
D
I
FSM
Value
Minimum 400
1
40
Unit
Watts
Watts
Amps
V
F
T
J
, T
STG
3.5
-55 to +150
Volts
℃
Note 1: Non-repetitive Current Pulse Per Fig. 3 and Derated above T
A
=25℃ Per Fig. 2
Note 2: Mounted on 5 x 5mm (.013mm Think) Copper Pads to Each Terminal
Note 3: 8.3ms Single Half Sine-wave or Equivalent Square Wave, Duty Cycle=4 Pulses Per Minute Maximum
Devices for Bipolar Applications
1. For Bidrectional Use C or CA Suffix for Types SMAJ5.0 through Types SMAJ188
2. Electrical Characterstics Apply in Both Directions
Version:F11
RATINGS AND CHARACTERISTIC CURVES (SMAJ SERIES)
FIG. 1 PEAK PULSE POWER RATING CURVE
100
P
PPM
, PEAK PULSE POWER, KW
NON-REPETITIVE
PULSE WAVEFORM
SHOWN in FIG.3
TA = 25℃
PEAK PULSE POWER(P
PP
) OR CURRENT (I
PP
)
A
DERATING IN PERCENTAGE (%)
FIG.2 PULSE DERATING CURVE
125
100
10
75
50
1
25
0.1
0.1
1
10
100
tp, PULSE WIDTH, (uS)
1000
10000
0
0
25
50
75
100
125
150
o
175
200
T
A
, AMBIENT TEMPERATURE ( C)
FIG. 3 CLAMPING POWER PULSE WAVEFORM
140
PEAK PULSE CURRENT (%)
120
100
80
60
40
20
td
0
0
0.5
1
1.5
2
t, TIME ms
2.5
3
3.5
4
0
1
PULSE WIDTH(td) is DEFINED
as the POINT WHERE the PEAK
CURRENT DECAYS to 50% OF IPPM
50
FIG. 4 MAXIMUM NON-REPETITIVE FORWARD SURGE
CURRENT UNIDIRECTIONAL ONLY
8.3mS Single Half Sine Wave
JEDEC Method
Peak Value
IPPM
Half Value-IPPM/2
10/1000sec, WAVEFORM
as DEFINED by R.E.A.
IFSM, PEAK FORWARD SURGE
A
CURRENT (A)
tr=10usec
40
30
20
10
10
NUMBER OF CYCLES AT 60 Hz
100
FIG. 5 TYPICAL JUNCTION CAPACITANCE
10000
CJ, JUNCTION CAPACITANCE (pF)
A
1000
MEASURED AT
ZERO BIAS
100
TA=25℃
f=1.0MHz
Vsig=50mVp-p
MEASURED at
STAND-OFF
VOLTAGE,Vwm
10
1
10
V(
BR
), BREAKDOWN VOLTAGE (V)
100
Version:F11
ELECTRICAL CHARACTERISTICS (TA=25℃ unless otherwise noted)
Device
Device
Marking
Code
AD
AE
AF
AG
AH
AK
AL
AM
AN
AP
AQ
AR
AS
AT
AU
AV
AW
AX
AY
AZ
BD
BE
BF
BG
BH
BK
BL
BM
BN
BP
BQ
BR
BS
BT
BU
BV
BW
BX
BY
BZ
CD
CE
CF
CG
CH
CK
CL
CM
CN
CP
CQ
CR
CS
CT
Working
Peak
Reverse
Voltage
V
WM
5
5
6
6
6.5
6.5
7
7
7.5
7.5
8
8
8.5
8.5
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
20
20
22
22
24
24
26
26
28
28
30
30
33
33
36
36
40
40
43
43
Breakdown Voltage
VBR (V)
at I
T
Min
6.4
6.4
6.67
6.67
7.22
7.22
7.78
7.78
8.33
8.33
8.89
8.89
9.44
9.44
10
10
11.1
11.1
12.2
12.2
13.3
13.3
14.4
14.4
15.6
15.6
16.7
16.7
17.8
17.8
18.9
18.9
20
20
22.2
22.2
24.4
24.4
26.7
26.7
28.9
28.9
31.1
31.1
33.3
33.3
36.7
36.7
40
40
44.4
44.4
47.8
47.8
Max
7.3
7
8.15
7.37
8.82
7.98
9.51
8.6
10.30
9.21
10.9
9.83
11.5
10.4
12.2
11.1
13.6
12.3
14.9
13.5
16.3
14.7
17.6
15.9
19.1
17.2
20.4
18.5
21.8
19.7
23.1
20.9
24.4
22.1
27.1
24.5
29.8
26.9
32.6
29.5
35.3
31.9
38
34.4
40.7
36.8
44.9
40.6
48.9
44.2
54.3
49.1
58.4
52.8
Test
Current
IT
(mA)
10
10
10
10
10
10
10
10
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Maximum
Clamping
Voltage at IPPM
Vc(V)
(Note5)
9.6
9.2
11.4
10.3
12.3
11.2
13.3
12.0
14.3
12.9
15.0
13.6
15.9
14.4
16.9
15.4
18.8
17.0
20.1
18.2
22.0
19.9
23.8
21.5
25.8
23.2
26.9
24.4
28.8
26.0
30.5
27.6
32.2
29.2
35.8
32.4
39.4
35.5
43.0
38.9
46.6
42.1
50.0
45.4
53.5
48.4
59.0
53.3
64.3
58.1
71.4
64.5
76.7
69.4
Maximum
Maximum
Peak Pulse
Reverse Leakage
Surge Current
@ V
WM
I
PPM
ID (uA)
(A)(Note5)
41.7
800
43.5
35.1
38.8
32.5
35.7
30.1
33.3
28.0
31.0
26.7
29.4
25.2
27.8
23.7
26.0
21.3
23.5
19.9
22.0
18.2
20.1
16.8
18.6
15.5
17.2
14.9
16.4
13.9
15.4
13.1
14.5
12.4
13.7
11.2
12.3
10.2
11.3
9.3
10.3
8.6
9.5
8.0
8.8
7.5
8.3
6.8
7.5
6.2
6.9
5.6
6.2
5.2
5.8
800
800
800
500
500
200
200
100
100
50.0
50.0
10.0
10.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Version:F11
SMAJ5.0
SMAJ5.0A
SMAJ6.0
SMAJ6.0A
SMAJ6.5
SMAJ6.5A
SMAJ7.0
SMAJ7.0A
SMAJ7.5
SMAJ7.5A
SMAJ8.0
SMAJ8.0A
SMAJ8.5
SMAJ8.5A
SMAJ9.0
SMAJ9.0A
SMAJ10
SMAJ10A
SMAJ11
SMAJ11A
SMAJ12
SMAJ12A
SMAJ13
SMAJ13A
SMAJ14
SMAJ14A
SMAJ15
SMAJ15A
SMAJ16
SMAJ16A
SMAJ17
SMAJ17A
SMAJ18
SMAJ18A
SMAJ20
SMAJ20A
SMAJ22
SMAJ22A
SMAJ24
SMAJ24A
SMAJ26
SMAJ26A
SMAJ28
SMAJ28A
SMAJ30
SMAJ30A
SMAJ33
SMAJ33A
SMAJ36
SMAJ36A
SMAJ40
SMAJ40A
SMAJ43
SMAJ43A
ELECTRICAL CHARACTERISTICS (TA=25℃ unless otherwise noted)
Device
Device
Marking
Code
CU
CV
CW
CX
CY
CZ
RD
RE
RF
RG
RH
RK
RL
RM
RN
RP
RQ
RR
RS
RT
RU
RV
RW
RX
RY
RZ
SD
SE
SF
SG
SH
SK
SL
SM
SN
SP
SQ
SR
ST
SS
Working
Peak
Reverse
Voltage
V
WM
45
45
48
48
51
51
54
54
58
58
60
60
64
64
70
70
75
75
78
78
85
85
90
90
100
100
110
110
120
120
130
130
150
150
160
160
170
170
188
188
Breakdown Voltage
VBR (V)
at I
T
Min
50
50
53.3
53.3
56.7
56.7
60
60
64.4
64.4
66.7
66.7
71.1
71.1
77.8
77.8
83.3
83.3
86.7
86.7
94.4
94.4
100
100
111
111
122
122
133
133
144
144
167
167
178
178
189
189
209
209
Max
61.1
55.3
65.1
58.9
69.3
62.7
73.3
66.3
78.7
71.2
81.5
73.7
86.9
78.6
95.1
86
102
92.1
106
95.8
115
104
122
111
136
123
149
135
163
147
176
159
204
185
218
197
231
209
255
231
Test
Current
IT
(mA)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Maximum
Clamping
Voltage at IPPM
Vc(V)
(Note5)
80.3
72.7
85.5
77.4
91.1
82.4
96.3
87.1
103
93.6
107
96.8
114
103
125
113
134
121
139
126
151
137
160
146
179
162
196
177
214
193
231
209
266
243
287
259
304
275
344
328
Maximum
Maximum
Peak Pulse
Reverse Leakage
Surge Current
@ V
WM
I
PPM
ID (uA)
(A)(Note5)
5.0
5.0
5.5
4.7
5.2
4.4
4.9
4.2
4.6
3.9
4.3
3.7
4.1
3.5
3.9
3.2
3.5
3.0
3.3
2.9
3.2
2
2.2
1.9
2.1
1.7
1.9
1.6
1.7
1.4
1.6
1.3
1.5
1.1
1.3
1
1.2
1
1.1
0.9
0.91
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
SMAJ45
SMAJ45A
SMAJ48
SMAJ48A
SMAJ51
SMAJ51A
SMAJ54
SMAJ54A
SMAJ58
SMAJ58A
SMAJ60
SMAJ60A
SMAJ64
SMAJ64A
SMAJ70
SMAJ70A
SMAJ75
SMAJ75A
SMAJ78
SMAJ78A
SMAJ85
SMAJ85A
SMAJ90
SMAJ90A
SMAJ100
SMAJ100A
SMAJ110
SMAJ110A
SMAJ120
SMAJ120A
SMAJ130
SMAJ130A
SMAJ150
SMAJ150A
SMAJ160
SMAJ160A
SMAJ170
SMAJ170A
SMAJ188
SMAJ188A
Notes:
1. Non-repetitive current pulse, per Fig. 3 and derated above T
A
=25℃ per Fig. 2
2. Mounted on 5 x 5mm copper pads to each terminal
3. Lead temperature at T
L
=75℃
4. Measure on 8.3ms single half sine-wave duty cycle=4 pulses per minutes maximum
5. Peak pulse power waveform is 10/1000 us
6. For Bi-Directional devices having V
R
of 10 volts and under, the I
R
limit is double.
Version:F11
TVS APPLICATION NOTES:
Transient Voltage Suppressors may be used at various points in a circuit to provide various degrees of
protection. The following is a typical linear power supply with transient voltage suppressor units plaved at
different points. All provide protection
Transient Voltage Suppressor 1 provides maximum protection. However, the system will probably require
replacement of the line fuse(F) since it provides a dominant portion of the series impedance when a surge is
encountered.
Hower, we do not recommend to use the TVS diode here, unless we can know the electric circuit
impedance and the magnitude of surge rushed into the circuit. Otherwise the TVS diode is easy to be
destroyed by voltage surge.
Transient Voltage Suppressor 2 provides execllent protection of circuitry excluding the transformer(T).
However, since the transformer is a large part of the series impedance, the chance of the line fuse opening
during the surge condition is reduced.
Transient Voltage Suppressor 3 provides the load with complete protection. It uses a unidirectional
Transient Voltage Suppressor, which is a cost advantage. The series impedance now includes the line fuse,
transformer, and bridge rectifier(B) so failure
Any combination of this three, or any one of these applivations, will prevent damage to the load. This would
require varying trade-offs in power supply protection versus maintenance(changing the time fuse).
An additional method is to utilize the Trans
RECOMMENDED PAD SIZES
The pad dimensions should be 0.010"(0.25mm) longer than the contact size, in the lead axis.
This allows a solder filler to form, see figure below. Contact factort for soldering methods.
Version : F11
stm32/stm8
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