Littelfuse P4SMA Series - Manual (Page 4)

Transient Voltage Suppression Diodes
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/20/14
Surface Mount – 400W > P4SMA series
I PPM
- P
eak P
ulse Cur
rent, %
I RSM
0
0
50
100
150
1.0 2.0 3.0 4.0
tr=10µsec
Peak Value
IPPM
IPPM
2
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
10/1000µsec. Waveform
as defined by R.E.A
td
t-Time (ms)
Half Value
IPPM
( )
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
(p
F)
Tj=25ºC
f=1.0MHz
Vsig=50mVp-p
Uni-directional V=0V
Bi-directional V=0V
V
BR
- Reverse Breakdown Voltage (V)
Bi-directional @V
R
Uni-directional @V
R
0 25 50 75 100 125 150 175
P M(A
V)
, Steady State Power Dissipation (W
)
T
A
- Ambient Temperature (ºC)
bargaining
3.0
0.6
1.2
1.8
3.6
2.4
0
Figure 3 - Pulse Derating Curve Figure 4 - Pulse Waveform
Figure 5 - Typical Junction Capacitance Figure 6 - Steady State Power Dissipation Derating Curve
0
5
10
15
20
25
30
35
40
45
1 10 100
I FS
M
- Peak Forward Surge Current (A)
Number of Cyles at 60 Hz
Figure 7 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
Ratings and Characteristic Curves
(T
A
=25°C unless otherwise noted) (Continued)