Datasheet

SMA4F Characteristics
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Figure 1. Definition of Ipp pulse
Table 4. Electrical characteristics - values (T
amb
= 25 °C)
Type
I
RM
max@V
RM
V
BR
@I
R
(1)
V
CL
@I
PP
10/1000 µs
R
D
(2)
10/1000 µs
V
CL
@I
PP
8/20 µs
R
D
(2)
8/20 µs
αT
(3)
25 °C 85 °C min typ max max max max
µA (Max) V V mA V A Ω VA Ω 10-4/°C
SMA4F5.0A 10 50 5.0 6.40 6.74 7.10 10 9.2 43.5 0.048 13.4 174 0.036 5.7
1. Pulse test: t
p
<50ms.
2. To calculate maximum clamping voltage at other surge currents, use the following formula
V
CLmax
= R
D
x I
PP
+ V
BRmax
3. To calculate V
BR
versus junction temperature, use the following formula:
V
BR
@ T
j
= V
BR
@ 25 °C x (1 + αT x (T
j
- 25))
100
50
%I
PP
t
r
t
p
0
t
Repetitive peak pulse current
tr = rise time (µs)
tp = pulse duration time (µs)
Figure 2. Relative peak power dissipation
versus initial junction temperature
Figure 3. Peak pulse power versus
exponential pulse duration
(T
j
initial = 25 °C)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
0 25 50 75 100 125 150 175 200
P
PP
[T
j
initial] / P
PP
[T
j
initial=25°C]
initial (°C)T
j
P (kW)
PP
1.E-01
1.E+00
1.E+01
1.E+02
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01
T
j
initial = 25 °C
t (ms)
p