Littelfuse AK3 Series - Manual (Page 3)

Transient Voltage Suppression Diodes
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/04/14
Axial Leaded – 3kA > AK3 series
L2 L1
A
G
D
E
F
C
B
C
Dimensions
Dimensions Inches Millimeters
A 0.951 +/- 0.040 24.15 +/- 1.00
B 0.094 +/- 0.024 2.40 +/- 0.60
C 0.236 +/- 0.039 6.00 +/- 1.00
D 0.433 max. 11.0 max.
E 0.050 +/- 0.002 1.27 +/- 0.05
F 0.374 max. 9.50 max.
G
-015C 0.093 +/- 0.039 2.36 +/- 1.00
-030C/-066C 0.130 +/- 0.047 3.30 +/- 1.20
-058C/-076C 0.168 +/- 0.047 4.27 +/- 1.20
-150C 0.383 +/- 0.047 9.72 +/- 1.20
-170C 0.420 +/- 0.047 10.67 +/- 1.20
-380C 0.547 +/- 0.047 13.90 +/- 1.20
-430C 0.583 +/- 0.047 14.80 +/- 1.20
L1/L2 L1 = L2 tolerance +/- 0.047 inch (+/- 1.20 mm)
Figure 7 - Surge Response (8/20 Surge current waveform)
Voltage
Current
Time (µs)
Note:
The power dissipation causes a change in avalanche
voltage during the surge and the avalanche voltage
eventually returns to the original value when the
transient has passed.
Figure 8 - Pulse Waveform
50
100
0
t
r
t
d
0
Peak
Value
Half Value
t – Time (µs)
I PP
– P
eak P
ulse C
ur
ren
t – %I
PP
t
r
= rise time to peak value
t
d
= decay time to half value
t
r x t d
=8/20µs
0.1
1
10
1000
0.00001 0.0001 0.001
P PPM
-Peak Pulse Power (kW
)
t
d
-Pulse Width (sec.)
100
AK3-076C
8/20µs
10/350µs
10/1000µs
Figure 5 - Typical Peak Pulse Power Rating Curve Figure 6 - Typical V
BR
Vs Junction Temperature
-8
-6
-4
-2
0
2
4
6
8
10
12
-50 -25 0 25 50 75 100 125
Percent of
V BR
Change
Junction Temperature(T
j
)