Transient Voltage Suppression Diodes
Axial Leaded – 6kA > AK6 series
RoHS
AK6 Series
Description
The AK6 series of high current transient suppressors have
been specially designed for use in A.C. line protection and
any demanding applications (AC or DC).They offer superior
clamping characteristics over standard S.A.D. technologies
by virtue of the Littelfuse Foldbak
™
technology, which
provides a clamping voltage lower than the avalanche
voltage (but above the rated working voltage). Therefore,
any voltage rise due to increased current conduction is
contained to a minimum, providing the best possible
protection level. They can also be connected in series and/
or parallel to create very high capacity protection solutions.
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E128662
Features
times less volume than
traditional discrete
solutions
technology for
superior clamping factor
™
Maximum Ratings and Thermal Characteristics
(T
A
=25 C unless otherwise noted)
O
for reliabilty
Unit
Parameter
Storage Temperature Range
Current Rating
1
Note:
1. Rated I
PP
measured with 8 x 20μS pulse.
Symbol
T T
I
PP
(-)55 to 150
6
°C
kA
Electrical Characteristics
Standoff
Voltage
(V
SO
) Volts
Max.
Reverse
Leakage
(I
R
) @V
SO
μA
Reverse Breakdown
Voltage (V
BR
) @ I
T
Min Volts Max Volts
70
95
220
245
285
443
490
Part
Numbers
Test
Current
I
T
(mA)
10
10
10
10
10
10
10
Max. Clamping Voltage Max. Temp
Max.
Agency
V
CL
@ I
pp
Peak Pulse Coefficient Capacitance Approval
Current (I
PP
) (Note 1)
OF V
BR
0 Bias 10kHz
V
CL
Volts
110
140
260
290
340
520
625
I
PP
Amps
6,000
6,000
6,000
6,000
6,000
6,000
6,000
(%/
O
C)
0.1
0.1
0.1
0.1
0.1
0.1
0.1
(nF)
8
6.5
2.8
2.5
2.0
1.4
1.0
X
X
X
X
X
X
X
AK6 - 058C
58
20
64
AK6 - 076C
76
20
85
AK6 - 170C
170
20
180
AK6 - 190C
190
20
200
AK6 - 240C
240
20
250
Note:
Using 8 x 20μS wave shape as defined in IEC 61000-4-5.
AK6 - 380C
380
20
401
AK6 - 430C
430
20
440
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to http://www.Littelfuse.com/series/AK6.html for current information.
129
Revision: June 17, 2009
AK6 Series
AK6 Series
Transient Voltage Suppression Diodes
Axial Leaded – 6kA > AK6 series
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Time (min to max) (t
s
)
Lead–free assembly
150°C
Temperature (T)
t
p
Ramp-up
Critical Zone
T
L
to T
P
T
P
200°C
60 – 180 secs
3°C/second max
3°C/second max
217°C
60 – 150 seconds
260
+0/-5
°C
20 – 40 seconds
6°C/second max
8 minutes Max.
280°C
T
L
T
s(max)
t
L
T
s(min)
Preheat
Ramp-down
t
s
25˚C
t 25˚C to Peak
Time (t)
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Flow/Wave Soldering (Solder Dipping)
Peak Temperature :
Dipping Time :
Soldering :
265
O
C
10 seconds
1 time
Physical Specifications
Weight
Case
Terminal
Contact manufacturer
Epoxy encapsulated
Silver plated leads, solderable per
MIL-STD-202 Method 208
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
A
Peak Power Derating
120
Percent of Rated Value
100
80
60
40
20
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE (°C)
AK6 Series
130
Revision: June 17, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to http://www.Littelfuse.com/series/AK6.html for current information.
Transient Voltage Suppression Diodes
Axial Leaded – 6kA > AK6 series
Dimensions
A
L2
Dimensions
F
L1
Inches
0.950
0.095
0.236
0.145
0.570 max.
0.050
0.500 max.
0.200
0.320
0.370
0.543
0.310
0.150
Millimeters
24.15
2.4
6.00
3.68
14.48 max.
1.270
12.70 max.
5.08
8.13
9.4
13.8
7
.87
3.81
G
D
B
C
E
A
B
C - 058C/076C
C
D
E
F
L1
L1 - 380C/430C
Part Marking System
Date Code
Littelfuse Logo
Part Numbering System
AK6 XXXX
Series Type
Stand Off Voltage
(Please Refer to Electrical
Characteristics Chart)
AK6-xxxx
Note:
UL mark does not appear on -058C & -076C.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to http://www.Littelfuse.com/series/AK6.html for current information.
131
Revision: June 17, 2009
AK6 Series
AK6 Series
XX
F
L
Product Type
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