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SMAJ54 产品手册 - Bourns J.W. Miller（伯恩斯）
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Bourns J.W. Miller（伯恩斯）
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DO-214AC
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SMAJ54数据手册
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9
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
Revision: January 09, 2009
Surface Mount – 400W > SMAJ series
SMAJ Series
Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.
SMAJ Series
Ratings and Characteristic Curves (T
A
=25°C unless otherwise noted)
0
20
40
60
80
100
0 25 50 75 100 125 150 175
T
A
-Ambient temperature (ºC)
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
1
10
100
1000
10000
1.0 10.0 100.0 1000.0
Cj (pF)
Tj=25ºC
f=1.0MHz
Vsig=50mVp-p
Uni-directional V=0V
Bi-directional V=0V
Uni-direc tional @V R
Bi-directional @VR
V
BR
- Reverse Breakdown Voltage (V)
0.1
1
10
0.000001 0.00001 0.0001 0.001
t
d
-Pulse Width (sec.)
P
PPM
-Peak Pulse Power (kW)
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
Figure 1 - Peak Pulse Power Rating Curve Figure 2 - Pulse Derating Curve
I
PPM
- Peak Pulse Current, % I
RSM
0
0
50
100
150
1.0 2.0 3.0 4.0
t
r
=10μsec
Peak Value
I
PPM
I
PPM
2
T
J
=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of I
PPM
10/1000μsec. Waveform
as defined by R.E.A
t
d
t-Time (ms)
Half Value
I
PPM
( )
Figure 3 - Pulse Waveform
Figure 4 - Typical Junction Capacitance
0
0.2
0.4
0.6
0.8
1
1.2
0 25 50 75 100 125 150 175
P
M(AV)
, Steady State Power Dissipation (W)
T
A
- Ambient Temperature (ºC)
Figure 5 - Steady State Power Dissipation Derating
Curve
0
5
10
15
20
25
30
35
40
45
1 10 100
Number of Cycles at 60 Hz
I
FSM
- Peak Forward Surve Current
(A)
Figure 6 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
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