Surface Mount Transient Voltage Suppressors (TVS)
SMAJ Series
5.0 To 440 V
400W
Ratings and Characteristic Curves (T
A
=25°C unless otherwise noted)
Figure 1 - Peak Pulse Power Rating Curve
100
Figure 2 - Pulse Derating Curve
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
100
P
PPM
- Peak Pulse Power (kW)
80
10
60
40
1
20
0.1
0.1
1
10
100
t
d
- Pulse Width (μs)
1000
10000
0
0
25
50
75
100
125
T
A
-Ambient temperature(°C)
150
175
Figure 3 - Pulse Waveform
150
Figure 4 - Typical Junction Capacitance
10000
I
PPM
- Peak Pulse Current, % I
RSM
t
r
=10µsec
Peak Value
IPPM
100
T
J
=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of I
PPM
Bi-directional
@zero bins
1000
Uni-directional @V
RWM
Uni-directional
@zero bins
Half Value
I
PPM
(I
PPM
/2)
50
10/1000µsec. Waveform
as defined by R.E.A
Cj (pF)
100
10
Tj=25°C
f=1.0MHz
Vsig=50mVp-p
Bi-directional @V
RWM
0
0
t
c
1.0
2.0
t - Time (ms)
3.0
4.0
1
1.0
10.0
100.0
1000.0
V
BR
-Reverse Breakdown Voltage (V)
Figure 5 - Steady State Power Derating Curve
P
M(AV)
, Steady State Power Dissipation (W)
1.0
Figure 6 - Maximum Non-Repetitive Surge Current
50
I
FSM
-Peak Forward Surge Current
(A)
T
J
=T
J
max.
8.3 ms Single Half Sine-Wave
0.8
40
0.6
0.4
30
20
0.2
0.0
0
25
50
75
100
125
150
175
200
T
L
- Lead Temperature(°C)
10
0
1
10
Number of Cycles at 60Hz
100
UN Semiconductor Co., Ltd.
Revision
October 18, 2013
4/7
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
UNSEMI [ UN Semiconducctor INC ]
