TVS Diodes
Axial Leaded – 3kA > AK3-Y series
RoHS
Pb
e4
AK3-Y Series
Description
The AK3-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
Maximum Ratings andThermal Characteristics
(TA=25OC unless otherwise noted)
• Recognized to UL 497B as • IEC-61000-4-2 ESD
an Isolated Loop Circuit
Protector
• Both reflow and wave
soldering capable
15kV(Air), 8kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2
Parameter
Symbol
TSTG
Value
Unit
°C
Operating StorageTemperature
Range
-55 to 150
• Very low clamping voltage
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Halogen-free and RoHS
compliant
Operating JunctionTemperature
Range
TJ
-55 to 125
3
ºC
• Ultra compact: less
than one-tenth the size
of traditional discrete
solutions
Current Rating1
IPP
kA
Note:
• Sharp breakdown voltage
• Low slope resistance
• Bi-directional
• Foldback technology for
superior clamping factor
• Glass passivated junction
1. Rated IPP measured with 8/20μs pulse.
• Pb-free E4 means 2nd level
interconnect is Pb-free
and the terminal finish
material is silver
Functional Diagram
• Symmetric in leads width
for easier soldering during
assembly.
Bi-direcctional
Electrical Characteristics (TA=25°C unless otherwise noted)
Max. Clamping
Max.
Max.
Max.
Test
Standoff
Voltage
Typical
IR @
Agency
Approval
Reverse Breakdown
Voltage (VBR) @ IT
Voltage
Temp
Reverse
Leakage
(I ) @VSO
R µA
Current
Capacitance
0 Bias 10kHz
Part
Part
VCL @ Ipp Peak Pulse Coefficient
Current (IPP) (Note 1)
Numbers Marking
(VSO)
85OC
(µA)
IT
OF VBR
Volts
Min Volts Max Volts (mA)
VCL Volts IPP Amps
(%/OC)
(nF)
AK3-015C-Y 3-015C
AK3-030C-Y 3-030C
AK3-038C-Y 3-038C
AK3-058C-Y 3-058C
AK3-066C-Y 3-066C
AK3-076C-Y 3-076C
AK3-150C-Y 3-150C
AK3-170C-Y 3-170C
AK3-190C-Y 3-190C
AK3-208C-Y 3-208C
AK3-380C-Y 3-380C
AK3-430C-Y 3-430C
Note:
15
30
38
58
66
10
10
10
10
10
10
10
10
10
10
10
10
15
15
15
15
15
15
15
15
15
15
15
15
16
32
40
64
72
19
37
46
70
80
10
10
10
10
10
10
10
10
10
10
10
10
28
90
95
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
9.0
11.0
10.0
6.0
6.0
6.0
2.6
2.4
2.4
2.4
2.0
2.0
X
X
110
120
140
230
260
290
306
520
625
X
X
X
X
X
X
X
X
X
76
85
95
150
170
190
208
380
430
158
179
200
223
401
440
194
220
245
246
443
490
1. Using 8/20μs wave shape as defined in IEC 61000-4-5.
©2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/19/19