TVS Diodes
SMTO-218 - 10 kA > LTKAK10 series
RoHS
LTKAK10 Series
Description
Pb
e3
The LTKAK10 series 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 various
capability and flexible protection solutions.
The LTKAK10 SMT package provides a more compact PCB
layout than typical through-hole AK TVS components.
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E128662
Features
• High Power TVS designed
in a surface mount
compact SMTO-218
package
• Patent pending package
design
• Foldbak technology for
superior clamping factor
• Tube or tape and reel pack
options available
• Ideal for automatic pick
and place assembly
and reflow process to
reduce the manufacturing
cost and increase the
soldering quality as
compared to axial leaded
packages
• Bi-directional
• Meet MSL level 1, per
J-STD-020, LF maximun
peak of 260°C
• Halogen free and RoHS
compliant
• Pb-free E3 means 2nd
level interconnect is
Pb-free and the terminal
finish material is tin(Sn)
(IPC/JEDEC J-STD-
609A.01)
• UL Recognized
compound meeting
flammability rating V-0
Maximum Ratings and Thermal Characteristics
(T
A
=25
O
C unless otherwise noted)
Parameter
Operating Junction
Storage Temperature Range
Current Rating
1
Typical Thermal Resistance
Junction to Lead
Typical Thermal Resistance
Junction to Ambient
Note:
1. Rated min I
PP
measured with 8/20μs pulse.
Symbol
T
J
T
STG
I
PP
R
ƟJL
R
ƟJL
Value
-55 to 125
-55 to 150
10
10
50
Unit
°C
kA
°C/W
°C/W
Functional Diagram
Bi-direcctional
Electrical Characteristics
Test
Reverse Breakdown
Current
Max.
Voltage (V
BR
) @ I
T
Standoff
I
T
Reverse
Voltage
Leakage
(V
SO
)
(I
R
) @V
SO
Min
Max
(V)
(mA)
(µA)
Volts
Volts
58
66
76
86
10
10
10
10
64
72
85
95
70
80
95
105
10
10
10
10
Max. Clamping Voltage
V
CL
@ Peak Pulse Current (I
PP
)
V
CL
Volts
110
120
140
157
Part
Numbers
Max.
Max. Temp
Coefficient Capacitance
0V Bias 10kHz
of V
BR
(%/
O
C)
0.1
0.1
0.1
0.1
Agency
Approval
I
PP
(8/20μs)
(A)
min
10,000
10,000
10,000
10,000
I
PP
(10/350μs)
(A)
min
typ
1,400
950
1,400
1,000
1,700
1,100
1,700
1,200
(nF)
8.5
7
.5
6.5
6.5
x
-
x
-
LTKAK10-058C
LTKAK10-066C
LTKAK10-076C
LTKAK10-086C
Note:
Using 8/20 waveshape as defined in IEC 61000-4-5 2nd edition.
©2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/26/18
TVS Diodes
SMTO-218 - 10 kA > LTKAK10 series
I-V Curve Characteristics
I
I
PP
P
PPM
Peak Pulse Power Dissipation
--
Max power dissipation
V
R
Stand-off Voltage
--
Maximum voltage that can be applied to the TVS without
operation
Bi-directional
I
T
I
R
V
R
V
BR
Vc
V
BR
Breakdown Voltage
--
V
Maximum voltage that flows though the TVS at a specified test
current (I
T
)
V
C
Clamping Voltage
--
Peak voltage measured across the TVS at a specified Ippm (peak
impulse current)
I
R
Reverse Leakage Current
--
Current measured at V
R
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
A
Typical Peak Pulse Power Rating Curve
1800
1600
8/20µs
Peak Power Derating
1400
1200
1000
800
600
400
200
0
0.00001
LTKAK10-058C
LTKAK10-066C
LTKAK10-076C
LTKAK10-086C
Percent of Rated Value
PPPM-Peak Pulse Power (kW)
100
80
60
40
20
0
0
25
50
75
100
125
10/350µs
0.0001
0.001
0.01
td-Pulse Width (sec.)
T
J
- Initial Junction Temperature (ºC)
Please contact Littelfuse for reliability or FIT/MTBF data, the component’s performance
is dependent on the application’s environmental conditions such as elevated ambient
temperatures.
Pulse Waveform
t
r
= rise time to peak value
t
d
= decay time to half value
I
PP
– Peak Pulse Current – %I
PP
100
Peak
Value
t
r
x t
d
=8/20µs
50
Half Value
0
0
t
r
t
d
t – Time (µs)
©2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/26/18
TVS Diodes
SMTO-218 - 10 kA > LTKAK10 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
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
200°C
60 – 180 secs
3°C/second max
3°C/second max
217°C
60 – 150 seconds
260
+0/-5
T
P
Ramp-up
t
p
Critical Zone
T
L
to T
P
T
L
Temperature (T)
t
L
T
s(max)
Ramp-down
T
s(min)
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
°C
20 – 40 seconds
6°C/second max
8 minutes Max.
260°C
Flow/Wave Soldering (Solder Dipping)
Peak Temperature :
Dipping Time :
Soldering :
265
O
C
10 seconds
1 time
Physical Specifications
Weight
Case
Terminal
Contact manufacturer
Compound encapsulated
Tin plated lead, solderable per
MIL-STD-202 Method 208
Environmental Specifications
High Temp. Storage
HTRB
MSL
H3TRB
RSH
JESD22-A103
JESD22-A108
JESDEC-J-STD-020, Level 1
JESD22-A101
JESD22-B106
Dimensions — SMTO-218 Tab
M
L
J
4.5°+/- 1.5
B
Dimension
A
B
C
D
E
F
G
H
J
L
M
N
Inches
Min
0.621
0.529
0.544
0.273
0.702
0.567
0.087
0.193
0.028
0.400
0.073
0.510
Max
0.655
0.594
0.561
0.285
0.737
0.587
0.126
0.222
0.033
0.440
0.112
0.533
Millimeters
Min
15.78
13.43
13.83
6.94
17
.82
14.40
2.20
4.89
0.72
10.17
1.85
12.95
Max
16.63
15.09
14.24
7
.24
18.72
14.90
3.20
5.65
0.85
11.17
2.85
13.55
N
F
A
C
G
15°+/- 5
Note:
Coplanarity of solder
side is controlled
within 0.08mm.
0.540
0.100
0.425
0.530
H
4.5°+/- 1.5
0.191
0.085
0.210
Pad Layout
D
E
©2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/26/18
TVS Diodes
SMTO-218 - 10 kA > LTKAK10 series
Part Numbering System
Part Marking System
Marking Code
LTK AK10 XXXX
X
Series Type
OPTION CODE:
BLANK
Reel Tape
-TP
Tube Pack
Stand Off Voltage
(Please Refer to Electrical
Characteristics Chart)
LTKAK10
-076C
F
L
Littelfuse Logo
YMXXX
Trace Code Marking
Y: Year Code
M: Month Code
XXX: Sequential Lot Number
Packaging
Part Number
LTKAK10-xxxC
LTKAK10-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
Disclaimer Notice -
Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at
http://www.littelfuse.com/disclaimer-electronics.
©2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/26/18
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