Transient Voltage Suppression Diodes
SMTO-218 - 6KA > LTKAK6 series
LTKAK6 Series
Description
RoHS
Pb
e3
The LTKAK6 series offer superior clamping characteristics
over standard SAD 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 various
capability and flexible protection solutions.
LTKAK6 in SMTO-218 package provide the enhanced
quality, easy manufacturing and compact mechanical
design than current AK TVS families.
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E128662
Features
• Compact design having
the Hi Power TVS in
surface mount package
• Bi-directional
• Foldbak Technology for
superior clamping factor
• Option for pack in tube or
tape and reel.
• Ideal for automatic pick
and place assembly
and reflow process to
reduce the manufacturing
cost and increase
the soldering quality
compared to axial leads
package
• Low clamping and slope
resistance.
• Sharp breakdown voltage.
• Halogen free and RoHS
compliant
• 2nd level interconnect
is Pb-free (IPC/JEDEC
J-STD-609A.01)
• Patent pending package
design
• Plastic package has
underwriters laboratory
flammability classification
V-O
Maximum Ratings and Thermal Characteristics
(T
A
=25
O
C unless otherwise noted)
Parameter
Operating Junction and
Storage Temperature Range
Current Rating
1
Note:
1. Rated min I
PP
measured with 8/20μs pulse.
Symbol
T
J ,
T
STG
I
PP
Value
(-)40 to 125
6
Unit
°C
kA
Functional Diagram
Bi-direcctional
Electrical Characteristics
(T =25°C unless otherwise noted)
A
Part
Numbers
Standoff
Voltage
(V
SO
)
(V)
Max.
Reverse
Leakage
(I
R
) @V
SO
(µA)
10
10
10
Reverse
Test
Breakdown Voltage Current
(V
BR
) @ I
T
I
T
Min
Volts
64
72
85
Max. Clamping Voltage
V
CL
@ Peak Pulse Current (I
PP
)
I
PP
(8/20μS)
(A)
min
typ
6,000
6,000
6,000
-
-
9,500
Max.
Max. Temp
Coefficient Capacitance
0 Bias 10kHz
of V
BR
(%/
O
C)
0.1
0.1
0.1
Max
Volts
70
80
95
(mA)
10
10
10
V
CL
Volts
110
120
140
I
PP
(10/350μS)
(A)
min
typ
1,000
600
1,100
-
-
-
(nF)
6.5
5.5
4.5
LTKAK6-058C
LTKAK6-066C
LTKAK6-076C
58
66
76
Note:
Using 8/20µS wave shaped defined in IEC 61000-4-5.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/10/2015
SMTO-218 - 6KA > LTKAK6 series
Transient Voltage Suppression Diodes
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
A
)
to peak
T
S(max)
to T
A
- Ramp-up Rate
Reflow
- Temperature (T
A
) (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.
260°C
T
L
T
s(max)
t
L
T
s(min)
Ramp-down
Preheat
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
Tin plated lead, solderable per
MIL-STD-202 Method 208
Part Numbering System
LTK AK6 XXXX
X
Series Type
OPTION CODE:
BLANK
Reel Tape
-TP
Tube Pack
Stand Off Voltage
(Please Refer to Electrical
Characteristics Chart)
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
A
Peak Power Derating
Part Marking System
Marking Code
Percent of Rated Value
100
80
60
40
20
0
0
25
50
75
100
125
Littelfuse Logo
LTKAK6
-076C
F
L
YMTXX
Trace Code Marking
Y: Year Code
M: Month Code
T: Manufacture Code
XX: Sequential Lot Number
T
J
- Initial Junction Temperature (ºC)
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/10/2015
AK10 Series
LTKAK10 Series
Transient Voltage Suppression Diodes
SMTO-218 - 6KA > LTKAK6 series
Dimensions — SMTO-218
J
B
Dimension
A
B
C
D
E
F
G
H
J
Inches
Min
0.621
0.529
0.544
0.273
0.702
0.567
0.074
0.193
0.028
Max
0.655
0.594
0.561
0.285
0.737
0.581
0.104
0.222
0.033
Millimeters
Min
15.78
13.43
13.83
6.94
17
.82
14.40
1.88
4.89
0.72
Max
16.63
15.09
14.24
7
.24
18.72
14.76
2.64
5.65
0.85
A
C
E
F
G
H
4°
D
0.540
0.100
0.425
0.530
0.191
0.053
0.210
Pad Layout
Packaging
Part Number
LTKAK6-xxxC
LTKAK6-xxxC-TP
Weight
4.34g
4.34g
Packing Mode
Tape & Reel – 32mm/13” tape
Tube Pack
Base Quantity
400
100(25/Tube)
Tape and Reel Specification
1.75
1.5
2.0
4.0
20.0
0.4
32.0
14.2
18.5
Dimensions in millimeters
14.5
7.6
Direction of Feed
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/10/2015
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