- 358 -
SMAJ SERIES
Surface Mount Transient Voltage Suppressor
Voltage Range
5.0 to 170 Volts
300 Watts Peak Power
Features
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
Fast response time:
BV min.
Typical I
R
less than 1
A above 10V
High temperature soldering guaranteed:
260C / 10 seconds at terminals
Plastic material used carries Underwriters Laboratory
Flammability Classification 94V-0
300 watts peak pulse power capability with a 10 x 1000 us
waveform by 0.01% duty cycle
Mechanical Data
Case: Molded plastic
Terminals: Solder plated
Polarity: Indicated by cathode band
Standard packaging: 12mm tape (EIA STD RS-481)
Weight: 0.064 gram
SMA/DO-214AC
Dimensions in inches and (millimeters)
Maximum Ratings and Electrical Characteristics
Rating at 25C ambient temperature unless otherwise specified.
Type Number
Symbol
Value
Units
P
eak
P
ower
D
issipation at
T
A
=25C,
Tp=1ms(
N
ote 1)
P
PK
Minimum 300
Watts
Peak Forward Surge Current, 8.3 ms Single Half
Sine-wave Superimposed on Rated Load
(JEDEC method) (Note 2, 3)
I
FSM
40.0
Amps
Maximum Instantaneous Forward Voltage at
25.0A for Unidirectional Only
V
F
3.5
Volts
Operating and Storage Temperature Range
T
J
, T
STG
-55 to + 150
C
Notes: 1. Non-repetitive Current Pulse Per Fig. 3 and Derated above
T
A
=25
O
C
Per Fig. 2.
Notes:
2. Mounted on 5.0mm
2
(.013 mm Thick) Copper Pads to Each Terminal.
Notes:
3. 8.3ms Single Half Sine-wave or Equivalent Square Wave, Duty Cycle=4 Pulses Per
Notes: 3.
Minute Maximum.
Devices for Bipolar Applications
Notes:
1. For Bidrectional Use C or CA Suffix forTypes SMAJ5.0 through Types SMAJ170.
Notes:
2. Electrical Characteristics Apply in Both Directions.
REV.1 Oct.-2003
- 359 -
RATINGS AND CHARACTERISTIC CURVES (SMAJ SERIES)
FIG.5- MAXIMUM NON-REPETITIVE PEAK FORWARD
SURGE CURRENT
PEAK
FOR
W
ARD
SURGE
CURRENT
.
(A)
1
10
100
0
10
40
30
20
50
NUMBER OF CYCLES AT 60Hz
8.3ms Single Half Sine Wave
JEDEC Method
TJ=TJ max.
FIG.1- PEAK PULSE POWER RATING CURVE
Pppm,
PEAK
PULSE
POWER,
KW
0.1 s
1.0 s
10 s
100 s
1.0ms
10ms
0.1
1.0
10
100
td. PULSE WIDTH, sec.
0.2" sq 5.0mm COPPER PAD AREAS
2
NON-REPETITIVE
PULSE WAVEFORM
SHOWN in FIG. 3
T =25 C
A
0
FIG.2- PULSE DERATING CURVE
PEAK
PULSE
POWER
(Pppm)
o
r
CURRENT
(lpp)
DERA
TING
IN
PERCENT
AGE,
%
0
25
50
75
100
125
150
175
200
0
25
50
75
100
TA, AMBIENT TEMPERATURE. C
O
FIG.3- PULSE WAVEFORM
0
1.0
2.0
3.0
4.0
0
50
150
100
t, TIME, ms
lppm,
PEAK
PULSE
CURRENT
%
PULSE WIDTH (td) is DEFINED
AS THE POINT WHERE THE PEAK
CURRENT DECAYS to 50% of lppm
tr=10 sec.
10/1000 sec. WAVEFORM
AS DEFINED BY R.E.A.
td
2
PEAK VALUE
lppm
HALF VALUE- lpp
FIG.4- TYPICAL JUNCTION CAPACITANCE
Cj,
JUNCTION
CAP
ACIT
ANCE,
pF
1
10
200
100
10
100
1,000
10,000
V(BR), BREAKDOWN VOLTAGE. (V)
Tj=25 C
f=1.0MHz
Vsig=50mVp-p
0
MEASURED AT
ZERO BIAS
MEASURED AT
STAND-OFF
VOLTAGE,V
WM
- 361 -
ELECTRICAL CHARACTERISTICS (TA=25
O
C unless otherwise noted)
Maximum
Maximum
Maximum
Device
Working Peak
Breakdown Voltage
Test
Clamping
Peak Pulse
Reverse
Device
Marking
Reverse
V(
BR
) (Volts)
Current
Voltage at I
PPM
Surge Current
Leakage
Code
Voltage
at I
T
I
T
V
C
(Volts)
I
PPM
at V
WM
V
WM
(Volts)
Min.
Max.
(mA)
(Note 5)
(Note 5)(Amps)
I
D
(uA)
SMAJ45
CU
45
50.0
61.1
1.0
80.3
3.9
5.0
SMAJ45A
CV
45
50.0
55.3
1.0
72.7
4.3
5.0
SMAJ48
CW
48
53.3
65.1
1.0
85.5
3.6
5.0
SMAJ48A
CX
48
53.3
58.9
1.0
77.4
4.0
5.0
SMAJ51
CY
51
56.7
69.3
1.0
91.1
3.4
5.0
SMAJ51A
CZ
51
56.7
62.7
1.0
82.4
3.8
5.0
SMAJ54
RD
54
60.0
73.3
1.0
96.3
3.2
5.0
SMAJ54A
RE
54
60.0
66.3
1.0
87.1
3.6
5.0
SMAJ58
RF
58
64.4
78.7
1.0
103
3.0
5.0
SMAJ58A
RG
58
64.4
71.2
1.0
93.6
3.3
5.0
SMAJ60
RH
60
66.7
81.5
1.0
107
2.9
5.0
SMAJ60A
RK
60
66.7
73.7
1.0
96.8
3.2
5.0
SMAJ64
RL
64
71.1
86.9
1.0
114
2.7
5.0
SMAJ64A
RM
64
71.1
78.6
1.0
103
3.0
5.0
SMAJ70
RN
70
77.8
95.1
1.0
125
2.5
5.0
SMAJ70A
RP
70
77.8
86.0
1.0
113
2.7
5.0
SMAJ75
RQ
75
83.3
102
1.0
134
2.3
5.0
SMAJ75A
RR
75
83.3
92.1
1.0
121
2.6
5.0
SMAJ78
RS
78
86.7
106
1.0
139
2.2
5.0
SMAJ78A
RT
78
86.7
95.8
1.0
126
2.5
5.0
SMAJ85
RU
85
94.4
115
1.0
151
2.0
5.0
SMAJ85A
RV
85
94.4
104
1.0
137
2.2
5.0
SMAJ90
RW
90
100
122
1.0
160
1.9
5.0
SMAJ90A
RX
90
100
111
1.0
146
2.1
5.0
SMAJ100
RY
100
111
136
1.0
179
1.7
5.0
SMAJ100A
RZ
100
111
123
1.0
162
1.9
5.0
SMAJ110
SD
110
122
149
1.0
196
1.6
5.0
SMAJ110A
SE
110
122
135
1.0
177
1.7
5.0
SMAJ120
SF
120
133
163
1.0
214
1.4
5.0
SMAJ120A
SG
120
133
147
1.0
193
1.6
5.0
SMAJ130
SH
130
144
176
1.0
231
1.3
5.0
SMAJ130A
SK
130
144
159
1.0
209
1.5
5.0
SMAJ150
SL
150
167
204
1.0
266
1.1
5.0
SMAJ150A
SM
150
167
185
1.0
243
1.3
5.0
SMAJ160
SN
160
178
218
1.0
287
1.0
5.0
SMAJ160A
SP
160
178
197
1.0
259
1.2
5.0
SMAJ170
SQ
170
189
231
1.0
304
1.0
5.0
SMAJ170A
SR
170
189
209
1.0
275
1.1
5.0
Notes:
1. Non-repetitive current pulse, per Fig. 3 and derated above T
A
=25
O
C per Fig. 2
2. Mounted on 5.0mm copper pads to each terminal
3. Lead temperature at TL=75
O
C
4. Measured on 8.3ms single half sine-wave duty cycle=4 pulses per minutes maximum
5. Peak pulse power waveform is 10/1000 us
2
6. For Bi-Directional devices having VR of 10 volts and under, the IR limit is double.
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