TVS Diode Datasheet
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: FW.02/14/23
LTKAK2-L Series
Modified SMTO-218 - 2 kA
■ Compact design having the Hi
Power TVS in surface mount
package
■ Patent pending package
design
■ Foldback 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-directional
■ Low clamping and slope
resistance
■ Sharp breakdown voltage
■ Meet MSL level 1, per
J-STD-020, LF maximun peak
of 245 °C
■ Halogen free and RoHS
compliant
■ Pb-free E3 means 2
nd
level
interconnect is Pb-free and
the terminal finish material
is tin (Sn) (IPC/JEDEC J-STD-
609A.01)
■ Plastic package has UL
flammability classification V-0
RoHS
Pb
e4
The LTKAK2-L 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.
LTKAK2-L series in modified SMTO-218 package provide
the enhanced quality, easy manufacturing and compact
mechanical design than current AK TVS families.
Description
Features
Parameter Symbol Value Unit
Operating Junction and Storage
Temperature Range
T
J ,
T
STG
-40 to 125 °C
Current Rating
1
I
PP
2 kA
Notes:
1. Rated min I
PP
measured with 8/20 μs pulse.
Maximum Ratings & Thermal Characteristics
(T
A
=25°C unless otherwise noted)
Functional Diagram
Bi-directional
Uni-directional
Cathode
Anode
Note: Using 8/20 μs wave shape as defined in IEC 61000-4-5.
Electrical Characteristics (T
A
= 25 °C unless otherwise noted)
Part
Number
(Uni)
Standoff
Voltage
(VSO)
(V)
Max. Reverse
Leakage
(I
R
) @V
SO
µA
Reverse
Breakdown
Voltage
(V
BR
) @ I
T
Test
Current
I
T
Max. Clamping
Voltage
V
CL
@ I
pp
Peak Pulse
Current (I
PP
) (Note 1)
Max. Temp
Coefficient
of
V
BR
Max.
Capacitance
0 Bias 10 kHz
Min Volts Max Volts
(mA) V
CL
Volts I
PP
Amps (%/°C) (nF)
LTKAK2-150C-L 150 10 167.0 185.0 5 243 2,000 0.1 7. 0
LTKAK2-160C-L 160 10 178.0 197.0 5 259 2,000 0.1 6.5
LTKAK2-170C-L 170 10 189.9 208.9 5 275 2,000 0.1 6.5
TVS Diode Datasheet
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: FW.02/14/23
LTKAK2-L Series
Modified SMTO-218 - 2 kA
I-V Curve Characteristics
0
20
40
60
80
100
0 25 50 75 100 125
Percent of Rated Value
T
J
- Initial Junction Temperature (ºC)
Ratings and Characteristic Curves (T
A
=25 °C unless otherwise noted)
Peak Power Derating
1
10
100
1000
0.00001 0.0001 0.001
P
PPM
-Peak Pulse Power(kW)
td-Pulse Width(sec)
10/350µs
8/20µs
Typical Peak Pulse Power Rating Curve
Vc
V
BR
VR
IR
IT
IPP
V
Vc
V
BR
VR
IPP
IR
IT
Bi-directional
I
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
V
BR
Breakdown Voltage -- 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
V
F
Forward Voltage Drop for Uni-directional