TVS Diodes
Axial Leaded – 20kA > AK20-Y series
RoHS
Pb e4
AK20-Y Series
Descriptions
The AK20-Y series of high powerTVS diode is specially
designed for meeting severe surge test environment of
both AC and DC line protection applications. It features a
very fast response and ultra low clamping characteristics
as compared to MOVs (Metal Oxide Varistors). It
accomplishes this by virtue of the Littelfuse FoldbackTM
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 maintained at a minimum magnitude,
providing the best possible protection level. These AK
components can be connected in series and / or parallel to
create a very high surge current protection solution.
Agency Recognitions
AGENCY
AGENCY FILE NUMBER
E128662
Features
• No wear-out nor degrade
surge rating over multiple
transient events as long
as within surge capability
• Ultra high power rating
• Very low clamping voltage
• Reflow soldering
capability
• Ultra compact: less
than one-tenth the size
of traditional discrete
solutions
• Sharp breakdown voltage
• Low slope resistance
• Bi-directional
• Foldbak technology for
superior clamping factor
• IIEC 61000-4-2 ESD 15 kV
(air), 8 kV (contact) rating
• Lightning, 20 kA (8/20 as
defined in IEC 61000-4-5
2nd edition)
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• UL Recognized
compound meeting
flammability rating V-0
• Halogen-free and RoHS
compliant
• Glass passivated junction
Maximum Ratings andThermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Symbol
TSTG
Value
Unit
°C
Operating StorageTemperature
Range
-55 to 150
Operating JunctionTemperature
Range
TJ
-55 to 125
20
ºC
Current Rating1
IPP
kA
Note:
1. Rated IPP measured with 8/20μs pulse as defined in IEC 61000-4-5 2nd edition.
• Pb-free E4 means 2nd level
interconnect is Pb-free
and the terminal finish
material is silver (IPC/
JEDEC J-STD-609A.01)
Functional Diagram
• Symmetric lead width
for easy soldering during
assembly
Bi-direcctional
Electrical Characteristics (TA=25°C unless otherwise noted)
Reverse
Max.
Max.Temp
Capacitance
Coefficient
0V Bias
Test
Current
IT
Breakdown
Voltage (VBR)
@ IT
Max. Clamping Voltage
VCL @ Peak Pulse Current (IPP)
Max.
Standoff
Voltage
Typical
IR @
Reverse
Leakage
(I ) @V
of VBR
Part
Numbers
Part
Marking
10kHz
(VSO
)
85OC
(µA)
R(µA)SO
Volts
VCL
I
VCL
I
(mA) (8/20μs) (8/2P0Pμs) (10/350μs) (10/3P5P0μs) (%/OC)
(nF)
Min Max
Volts Volts
Volts
30
120
125
130
160
Amps
20,000
20,000
20,000
20,000
20,000
Volts
28
107
110
120
145
Amps
3,200
3,200
3,200
3,200
3,200
AK20-016C-Y 20-016C
AK20-058C-Y 20-058C
AK20-063C-Y 20-063C
AK20-066C-Y 20-066C
AK20-076C-Y 20-076C
16
58
63
66
76
5
5
5
5
5
15
15
15
15
15
17. 5 19.3
64.0 70.0
68.0 75.0
72.0 80.0
85.0 95.0
10
10
10
10
10
0.1
0.1
0.1
0.1
0.1
32
12
10
10
10
Note: using 8/20 waveshape as defined in IEC 61000-4-5 2nd edition
©2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/09/18
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