Transient Suppression Diodes
For General Purpose Use
GENERAL DESCRIPTION
The SMAJ, SMBJ, and SMCJ Series are a popular format of general purpose
transient voltage suppression diodes. They are based on the low leakage,
high reliability, but low cost glass passivated chip rectifier technology.
SMAJ
FEATURES
•
•
•
•
•
•
•
•
Glass passivated chip
400W, 600W and 1500W types (10/1000us)
Low leakage
Flat clamping
Very fast response time
Halogen Free
≤1μA leakage for 12V and up
Lead-Free Terminations
APPLICATIONS
•
•
•
•
Consumer
Industrial
Telecom
Computer
SMBJ
SMCJ
HOW TO ORDER
SMAJ
12
Series
SMAJ = 400W
SMBJ = 600W
SMCJ = 1500W
Voltage
WM
5V - 400V
C
Polarity
C = Bi-directional
= Uni-directional
A
Tolerance
A = 5% Volage
Tolerance
MAXIMUM RATINGS
RATING
Peak power dissipation with a 10/1000us waveform
1
Peak pulse current with a 10/1000us waveform
1
Power dissipation on infinite heat sink at TL = 75ºC
Peak forward surge current,8.3ms single half
sine-wave unidirectional only
2
Operating junction and storage temperature range
Typical thermal resistance junction to air
Typical thermal resistance junction to case
SYMBOL
P
PPM
I
PPM
P
D
I
FSM
T
J
,T
STG
θ
JA
θ
JC
SMAJ
400
1.0
40
-55 ~ 150
120
30
SMBJ
600
See tables
5.0
100
-55 ~ 150
100
20
SMCJ
1500
6.5
200
-55 ~ 150
75
15
UNITS
Watts
Amps
Watts
Amps
ºC
ºC/W
ºC/W
NOTES:
1. Non-repetitive current pulse per Fig. 5 and derated above T
A
= 25ºC per Fig. 1
2. Measured on 8.3ms single half sine-wave or equivalent square wave, duty cycle = 4 pulses per minute maximum.
1
Transient Suppression Diodes
For General Purpose Use
SMAJ SERIES PARAMETERS
SMAJ
Part Number
UNI-POLAR
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
SMAJ19A
SMAJ20A
SMAJ22A
SMAJ24A
SMAJ26A
SMAJ28A
SMAJ30A
SMAJ33A
SMAJ36A
SMAJ40A
SMAJ43A
SMAJ45A
SMAJ48A
SMAJ51A
SMAJ54A
SMAJ58A
SMAJ60A
SMAJ64A
SMAJ70A
SMAJ75A
SMAJ78A
SMAJ80A
SMAJ85A
SMAJ90A
SMAJ100A
SMAJ110A
SMAJ120A
SMAJ130A
SMAJ140A
SMAJ150A
SMAJ160A
SMAJ170A
SMAJ180A
SMAJ190A
SMAJ200A
SMAJ220A
SMAJ250A
SMAJ300A
SMAJ350A
SMAJ400A
SMAJ440A
BI-POLAR
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
SMAJ19CA
SMAJ20CA
SMAJ22CA
SMAJ24CA
SMAJ26CA
SMAJ28CA
SMAJ30CA
SMAJ33CA
SMAJ36CA
SMAJ40CA
SMAJ43CA
SMAJ45CA
SMAJ48CA
SMAJ51CA
SMAJ54CA
SMAJ58CA
SMAJ60CA
SMAJ64CA
SMAJ70CA
SMAJ75CA
SMAJ78CA
SMAJ80CA
SMAJ85CA
SMAJ90CA
SMAJ100CA
SMAJ110CA
SMAJ120CA
SMAJ130CA
SMAJ140CA
SMAJ150CA
SMAJ160CA
SMAJ170CA
SMAJ180CA
SMAJ190CA
SMAJ200CA
SMAJ220CA
SMAJ250CA
SMAJ300CA
SMAJ350CA
SMAJ400CA
SMAJ440CA
Device
Marking
Code
UNI
BI
AE
WE
AG
WG
AK
WK
AM
WM
AP
WP
AR
WR
AT
WT
AV
WV
AX
WX
AZ
WZ
BE
XE
BG
XG
BK
XK
BM
XM
BP
XP
BR
XR
BT
XT
BB
XB
BV
XV
BX
XX
BZ
XZ
CE
YE
CG
YG
CK
YK
CM
YM
CP
YP
CR
YR
CT
YT
CV
YV
CX
YX
CZ
YZ
RE
ZE
RG
ZG
RK
ZK
RM
ZM
RP
ZP
RR
ZR
RT
ZT
RB
ZB
RV
ZV
RX
ZX
RZ
ZZ
SE
VE
SG
VG
SK
VK
SB
VB
SM
VM
SP
VP
SR
VR
ST
VT
SV
VV
SW
VW
SX
VX
SZ
VZ
DE
HE
DG
HG
DK
HK
DM
HM
Working Peak
Breakdown Voltage
Reverse Voltage
V
BR
@I
T
V
RWM
(V)
Min. (V) Max. (V) IT (mA)
5
6.4
7
10
6
6.7
7.37
10
6.5
7.2
7.98
10
7
7.8
8.6
10
7.5
8.3
9.21
1
8
8.9
9.83
1
8.5
9.4
10.4
1
9
10
11.1
1
10
11.1
12.3
1
11
12.2
13.5
1
12
13.3
14.7
1
13
14.4
15.9
1
14
15.6
17.2
1
15
16.7
18.5
1
16
17.8
19.7
1
17
18.9
20.9
1
18
20
22.1
1
19
21.1
23.3
1
20
22.2
24.5
1
22
24.4
26.9
1
24
26.7
29.5
1
26
28.9
31.9
1
28
31.1
34.4
1
30
33.3
36.8
1
33
36.7
40.6
1
36
40
44.2
1
40
44.4
49.1
1
43
47.8
52.8
1
45
50
55.3
1
48
53.3
58.9
1
51
56.7
62.7
1
54
60
66.3
1
58
64.4
71.2
1
60
66.7
73.7
1
64
71.1
78.6
1
70
77.8
86
1
75
83.3
92.1
1
78
86.7
95.8
1
80
88.8
97.6
1
85
94.4
104
1
90
100
111
1
100
111
123
1
110
122
135
1
120
133
147
1
130
144
159
1
140
155
171
1
150
167
185
1
160
178
197
1
170
189
209
1
180
200
220
1
190
211
232
1
200
224
247
1
220
246
272
1
250
279
309
1
300
335
371
1
350
391
432
1
400
447
494
1
440
492
543
1
Maximum
Clamping
Voltage V
C
(V)
@ I
PP
9.2
10.3
11.2
12
12.9
13.6
14.4
15.4
17
18.2
19.9
21.5
23.2
24.4
26
27.6
29.2
30.8
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
113
121
126
130
137
146
162
177
193
209
227
243
259
275
292
308
324
356
405
486
567
648
713
Maximum
Reverse
Surge Current
@10 x 1000μs
43.48
38.83
35.71
33.33
31.01
29.41
27.78
25.97
23.53
21.98
20.1
18.6
17.24
16.39
15.38
14.49
13.7
13
12.35
11.27
10.28
9.5
8.81
8.26
7.5
6.88
6.2
5.76
5.5
5.17
4.85
4.59
4.27
4.13
3.88
3.54
3.31
3.17
3.09
2.92
2.74
2.47
2.26
2.07
1.91
1.76
1.65
1.54
1.45
1.37
1.3
1.23
1.12
0.99
0.82
0.71
0.62
0.56
Maximum
Reverse
Leakage I
R
(μA)
@V
RWM
800
800
500
200
100
50
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
NOTES:
1. Suffix “A” denotes 5% tolerance device.
2. Add suffix “CA” after part number to specify Bi-directional devices.
3. For Bi-Directional devices having VR of 10 volts and under, the I
R
limit is double.
2
Transient Suppression Diodes
For General Purpose Use
SMAJ SERIES RATINGS AND CHARACTERISTICS
FIG 1. PULSE DERATING CURVE
Peak Pulse Derating in Percentage
of Peak Power or Current (%)
100
50
FIG 2. MAXIMUM NON-REPETITIVE
Peak Forward Surge Current (A)
T
J
= T
J
max.
8.3 ms Single Half Sine-Wave
75
40
30
20
10
0
50
25
0
0
25
50
75
100
125
150
175
200
1
10
100
Ambient Temperature TA (ºC)
Number of Cycles at 60Hz
FIG 3. STEADY STATE POWER DERATING CURVE
Steady State Power Dissipation (W)
100
100
FIG 4. PEAK PULSE POWER RATING CURVE
Peak Power (kW)
75
10
Non-repetitive Pulse
Waveform shown in Fig 5
T
A
= 25ºC
50
0.1
25
0
0
25
50
75
100
125
150
175
200
0.1
0.1
1
10
100
1000
10000
Lead Temperature T
L
(ºC)
Pulse Width td (µs)
FIG 5. PULSE WAVEFORM
Tr = 10µs
Peak Value (I
PP
)
T
J
= 25ºC
Pulse width (td) is defined as the
point where the peak current
decasys to 50% of I
PP
100
Peak Pulse Current (%)
50
Half value = I
PP
2
10/100µsec. waveform
as defined by R.E.A.
td
0
0
1
2
3
4
Time (ms)
3
Transient Suppression Diodes
For General Purpose Use
SMBJ SERIES PARAMETERS
SMBJ
Part Number
UNI-POLAR
SMBJ5.0A
SMBJ6.0A
SMBJ6.5A
SMBJ7.0A
SMBJ7.5A
SMBJ8.0A
SMBJ8.5A
SMBJ9.0A
SMBJ10A
SMBJ11A
SMBJ12A
SMBJ13A
SMBJ14A
SMBJ15A
SMBJ16A
SMBJ17A
SMBJ18A
SMBJ19A
SMBJ20A
SMBJ22A
SMBJ24A
SMBJ26A
SMBJ28A
SMBJ30A
SMBJ33A
SMBJ36A
SMBJ40A
SMBJ43A
SMBJ45A
SMBJ48A
SMBJ51A
SMBJ54A
SMBJ58A
SMBJ60A
SMBJ64A
SMBJ70A
SMBJ75A
SMBJ78A
SMBJ80A
SMBJ85A
SMBJ90A
SMBJ100A
SMBJ110A
SMBJ120A
SMBJ130A
SMBJ140A
SMBJ150A
SMBJ160A
SMBJ170A
SMBJ180A
SMBJ190A
SMBJ200A
SMBJ220A
SMBJ250A
SMBJ300A
SMBJ350A
SMBJ400A
SMBJ440A
BI-POLAR
SMBJ5.0CA
SMBJ6.0CA
SMBJ6.5CA
SMBJ7.0CA
SMBJ7.5CA
SMBJ8.0CA
SMBJ8.5CA
SMBJ9.0CA
SMBJ10CA
SMBJ11CA
SMBJ12CA
SMBJ13CA
SMBJ14CA
SMBJ15CA
SMBJ16CA
SMBJ17CA
SMBJ18CA
SMBJ19CA
SMBJ20CA
SMBJ22CA
SMBJ24CA
SMBJ26CA
SMBJ28CA
SMBJ30CA
SMBJ33CA
SMBJ36CA
SMBJ40CA
SMBJ43CA
SMBJ45CA
SMBJ48CA
SMBJ51CA
SMBJ54CA
SMBJ58CA
SMBJ60CA
SMBJ64CA
SMBJ70CA
SMBJ75CA
SMBJ78CA
SMBJ80CA
SMBJ85CA
SMBJ90CA
SMBJ100CA
SMBJ110CA
SMBJ120CA
SMBJ130CA
SMBJ140CA
SMBJ150CA
SMBJ160CA
SMBJ170CA
SMBJ180CA
SMBJ190CA
SMBJ200CA
SMBJ220CA
SMBJ250CA
SMBJ300CA
SMBJ350CA
SMBJ400CA
SMBJ440CA
Device
Marking
Code
UNI
BI
KE
AE
KG
AG
KK
AK
KM
AM
KP
AP
KR
AR
KT
AT
KV
AV
KX
AX
KZ
AZ
LE
BE
LG
BG
LK
BK
LM
BM
LP
BP
LR
BR
LT
BT
LB
BB
LV
BV
LX
BX
LZ
BZ
ME
CE
MG
CG
MK
CK
MM
CM
MP
CP
MR
CR
MT
CT
MV
CV
MX
CX
MZ
CZ
NE
DE
NG
DG
NK
DK
NM
DM
NP
DP
NR
DR
NT
DT
NB
DB
NV
DV
NX
DX
NZ
DZ
PE
EE
PG
EG
PK
EK
PB
EB
PM
EM
PP
EP
PR
ER
PT
ET
PV
EV
PW
EW
PX
EX
PZ
EZ
QE
FE
QG
FG
QK
FK
QM
FM
Working Peak
Breakdown Voltage
Reverse Voltage
V
BR
@I
T
V
RWM
(V)
Min. (V) Max. (V) IT (mA)
5.0
6.40
7.00
10
6.0
6.67
7.37
10
6.5
7.22
7.98
10
7.0
7.78
8.60
10
7.5
8.33
9.21
1
8.0
8.89
9.83
1
8.5
9.44
10.4
1
9.0
10.0
11.1
1
10
11.1
12.3
1
11
12.2
13.5
1
12
13.3
14.7
1
13
14.4
15.9
1
14
15.6
17.2
1
15
16.7
18.5
1
16
17.8
19.7
1
17
18.9
20.9
1
18
20.0
22.1
1
19
21.1
23.3
1
20
22.2
24.5
1
22
24.4
26.9
1
24
26.7
29.5
1
26
28.9
31.9
1
28
31.1
34.4
1
30
33.3
36.8
1
33
36.7
40.6
1
36
40.0
44.2
1
40
44.4
49.1
1
43
47.8
52.8
1
45
50.0
55.3
1
48
53.3
58.9
1
51
56.7
62.7
1
54
60.0
66.3
1
58
64.4
71.2
1
60
66.7
73.7
1
64
71.1
78.6
1
70
77.8
86.0
1
75
83.3
92.1
1
78
86.7
95.8
1
80
88.8
97.6
1
85
94.4
104
1
90
100
111
1
100
111
123
1
110
122
135
1
120
133
147
1
130
144
159
1
140
155
171
1
150
167
185
1
160
178
197
1
170
189
209
1
180
200
220
1
190
211
232
1
200
224
247
1
220
246
272
1
250
279
309
1
300
335
371
1
350
391
432
1
400
447
494
1
440
492
543
1
Maximum
Clamping
Voltage V
C
(V)
@ I
PP
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
30.8
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
113
121
126
130
137
146
162
177
193
209
227
243
259
275
292
308
324
356
405
486
567
648
713
Maximum
Reverse
Surge Current
@10 x 1000μs
65.22
58.25
53.57
50.00
46.51
44.12
41.67
38.96
35.29
32.97
30.15
27.91
25.86
24.59
23.08
21.74
20.55
19.49
18.52
16.90
15.42
14.25
13.22
12.40
11.26
10.33
9.30
8.65
8.25
7.75
7.28
6.89
6.41
6.20
5.83
5.31
4.96
4.76
4.63
4.38
4.11
3.70
3.39
3.11
2.87
2.65
2.47
2.32
2.18
2.06
1.95
1.85
1.69
1.48
1.23
1.06
0.93
0.84
Maximum
Reverse
Leakage I
R
(μA)
@V
RWM
800
800
500
200
100
50
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
NOTES:
1. Suffix “A” denotes 5% tolerance device.
2. Add suffix “CA” after part number to specify Bi-directional devices.
3. For Bi-Directional devices having VR of 10 volts and under, the I
R
limit is double.
4
Transient Suppression Diodes
For General Purpose Use
SMBJ SERIES RATINGS AND CHARACTERISTICS
FIG 1. PULSE DERATING CURVE
Peak Pulse Derating in Percentage
of Peak Power or Current (%)
100
100
FIG 2. MAXIMUM NON-REPETITIVE
Peak Forward Surge Current (A)
T
J
= T
J
max.
8.3 ms Single Half Sine-Wave
75
80
60
40
20
0
50
25
0
0
25
50
75
100
125
150
175
200
1
10
100
Ambient Temperature TA (ºC)
Number of Cycles at 60Hz
FIG 3. STEADY STATE POWER DERATING CURVE
Steady State Power Dissipation (W)
5.0
4.0
3.0
2.0
1.0
0
0.1
100
FIG 4. PEAK PULSE POWER RATING CURVE
Peak Power (kW)
10
Non-repetitive Pulse
Waveform shown in Fig 5
T
A
= 25ºC
0.1
0
25
50
75
100
125
150
175
200
0.1
1
10
100
1000
10000
Lead Temperature T
L
(ºC)
Pulse Width td (µs)
FIG 5. PULSE WAVEFORM
Tr = 10µs
Peak Value (I
PP
)
T
J
= 25ºC
Pulse width (td) is defined as the
point where the peak current
decasys to 50% of I
PP
100
Peak Pulse Current (%)
50
Half value = I
PP
2
10/100µsec. waveform
as defined by R.E.A.
td
0
0
1
2
3
4
Time (ms)
5
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