Transient Voltage Suppression Diodes
SMTO-218 - 6KA > LTKAK6 series
LTKAK6 Series
RoHS
Pb e3
Description
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
Features
E128662
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Symbol
Value
Unit
Operating Junction and
Storage Temperature Range
TJ , TSTG
(-)40 to 125
°C
IPP
6
kA
Current Rating1
Note:
1. Rated min IPP measured with 8/20μs pulse.
Functional Diagram
• 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
• 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
Bi-direcctional
Electrical Characteristics (T =25°C unless otherwise noted)
A
Part
Numbers
LTKAK6-058C
LTKAK6-066C
LTKAK6-076C
Standoff
Voltage
(VSO)
(V)
Max.
Reverse
Leakage
(IR) @VSO
(µA)
58
66
76
10
10
10
Reverse
Test
Breakdown Voltage Current
(VBR) @ IT
IT
Max.
Max. Temp
Coefficient Capacitance
0 Bias 10kHz
of VBR
Max. Clamping Voltage
VCL @ Peak Pulse Current (IPP)
Min
Volts
Max
Volts
(mA)
VCL Volts
64
72
85
70
80
95
10
10
10
110
120
140
IPP
(8/20μS)
(A)
min
typ
6,000
6,000
6,000
9,500
IPP
(10/350μS)
(A)
min
typ
1,000
600
1,100
-
(%/OC)
(nF)
0.1
0.1
0.1
6.5
5.5
4.5
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
Transient Voltage Suppression Diodes
SMTO-218 - 6KA > LTKAK6 series
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (min to max) (ts)
60 – 180 secs
Average ramp up rate (Liquidus Temp (TA)
to peak
Reflow
Ramp-up
TL
3°C/second max
TS(max) to TA - Ramp-up Rate
tp
TP
Critical Zone
TL to TP
tL
Ts(max)
Ramp-down
Ts(min)
ts
Preheat
3°C/second max
25˚C
- Temperature (TA) (Liquidus)
217°C
- Time (min to max) (ts)
60 – 150 seconds
t 25˚C to Peak
Time (t)
Peak Temperature (TP)
260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)
20 – 40 seconds
Flow/Wave Soldering (Solder Dipping)
Ramp-down Rate
6°C/second max
Peak Temperature :
265OC
Time 25°C to peak Temperature (TP)
8 minutes Max.
Dipping Time :
10 seconds
Do not exceed
260°C
Soldering :
1 time
Physical Specifications
Part Numbering System
LTK AK6 XXXX X
Weight
Contact manufacturer
Case
Epoxy encapsulated
Terminal
Tin plated lead, solderable per
MIL-STD-202 Method 208
OPTION CODE:
BLANK Reel Tape
-TP Tube Pack
Series Type
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
Percent of Rated Value
Marking Code
100
LTKAK6
-076C
80
LF
60
40
Littelfuse Logo
20
0
0
25
50
75
100
TJ - Initial Junction Temperature (ºC)
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/10/2015
125
YMTXX
Trace Code Marking
Y: Year Code
M: Month Code
T: Manufacture Code
XX: Sequential Lot Number
AK10 Series
Pre Heat
Lead–free assembly
Temperature (T)
Reflow Condition
LTKAK10 Series
Soldering Parameters
Transient Voltage Suppression Diodes
SMTO-218 - 6KA > LTKAK6 series
Dimensions — SMTO-218
B
J
Inches
Dimension
A
C
A
B
C
D
E
F
G
H
J
F
E
G
H
4°
Millimeters
Min
Max
Min
Max
0.621
0.529
0.544
0.273
0.702
0.567
0.074
0.193
0.028
0.655
0.594
0.561
0.285
0.737
0.581
0.104
0.222
0.033
15.78
13.43
13.83
6.94
17.82
14.40
1.88
4.89
0.72
16.63
15.09
14.24
7.24
18.72
14.76
2.64
5.65
0.85
D
0.540
0.100
0.425
0.530
0.191
0.053
0.210
Pad Layout
Packaging
Part Number
Weight
Packing Mode
Base Quantity
LTKAK6-xxxC
4.34g
Tape & Reel – 32mm/13” tape
400
LTKAK6-xxxC-TP
4.34g
Tube Pack
100(25/Tube)
1.5
2.0
4.0
20.0
0.4
14.2
1.75
Tape and Reel Specification
32.0
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