SMAJ SERIES
DATA SHEET
TRANSIENT VOLTAGE SUPPRESSORS – SMAJ SERIES
FEATURE
For surface mounted applications in order to optimize board space.
Low profile package.
Built-in strain relief.
Glass passivated junction.
Low inductance.
SMA/DO-214AC
Excellent clamping capability.
Repetition Rate (duty cycle):0.01%.
Fast response time: typically less than 1.0ps from 0 Volts to V
BR
for unidirectional types.
Typical I
R
less than 1μA above 10V.
High Temperature soldering: 260°C/10 seconds at terminals.
Plastic package has Underwriters Laboratory Flammability 94V-O.
MECHANICAL DATE
Case: JEDEC DO214AC. Molded plastic over glass passivated junction.
Terminal: Solder plated, solderable per MIL-STD-750, Method 2026.
Polarity: Color band denoted positive end (cathode) except Bidirectional.
Standard Packaging: 12mm tape (EIA STD RS-481).
Weight: 0.002 ounce, 0.061 grams.
DEVICES FOR BIPOLAR APPLICATION
For bidirectional use C or CA suffix for types SMAJ5.0 thru types SMAJ440 (e.g.SMAJ5.0CA, SMAJ440CA),
electrical characteristics apply in both directions.
MAXIMUM RATINGS AND CHARACTERISTICS
Ratings at 25
ambient temperature unless otherwise specified.
RATING
Peak Pulse Power Dissipation on 10/1000 s waveform
(Note1,Note2, Fig.1).
Peak Pulse Current of on 10/1000 s waveform.(Note1,Fig.3)
Steady State Power Dissipation at T
L
=75
(9.5mm) (Note2,Fig.5).
,Lead lengths.375”,
SYMBOL
P
PPM
I
PPM
P
M(AV)
I
FSM
T
J
, T
STG
VALUE
Minimum 400
See Table
3.3
40
-65 to +150
UNITS
Watts
Amps
Watts
Amps
Peak Forward Surge Current,8.3ms Single Half Sine-Wave
Superimposed on Rated Load, (JEDEC Method) (Note 3,Fig.6).
Operating junction and Storage Temperature Range.
Notes: 1. Non-repetitive current pulse, per Fig. 3 and derated above TA = 25 per Fig. 2.
2. Mounted on 5.0mm x 5.0mm (0.03mm thick) Copper Pads to each terminal.
3. 8.3ms single half sine-wave, or equivalent square wave, Duty cycle = 4 pulses per minutes maximum.
Revision:15-Dec-11
www.brightking.com
SMAJ SERIES
RATINGS AND CHARACTERISTIC CURVES
Figure 1 - Peak Pulse Power Rating Curve
10
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
P
PPM
-Peak Pulse Power (kW)
(TA=25
unless otherwise noted)
Figure 2 - Pulse Derating Curve
100
80
60
1
40
20
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
0.1
0.000001
0
0.00001
0.0001
0.001
0
25
50
75
100
125
150
175
t
d
-Pulse Width (sec.)
T
A
-Ambient temperature (ºC)
Figure 3 - Pulse Waveform
150
I
PPM
- Peak Pulse Current, % I
RSM
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
Figure 4 - Typical Junction Capacitance
10000
Bi-directional V=0V
100
1000
Uni-directional V=0V
( )
2
10/1000μsec. Waveform
as defined by R.E.A
Cj (pF)
Half Value
IPPM
IPPM
Uni-directional @VR
100
Bi-directional @VR
50
10
Tj=25ºC
f=1.0MHz
Vsig=50mVp-p
0
td
1
0
1.0
2.0
t-Time (ms)
3.0
4.0
1.0
10.0
100.0
1000.0
V
BR
- Reverse Breakdown Voltage (V)
Figure 5 - Steady State Power Dissipation Derating Curve
Figure 6 - 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
P
M(AV)
, Steady State Power Dissipation (W)
1.2
1
0.8
0.6
0.4
0.2
0
0
25
50
75
100 125 150
T
A
- Ambient Temperature (ºC)
175
Revision:15-Dec-11
www.brightking.com
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