TVS Diodes
Axial Leaded – 3kA > AK3-Y series
AK3-Y Series
RoHS
Pb e4
Agency Recognitions
AGENCY
AGENCY FILE NUMBER
E128662
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Operating Storage Temperature
Range
Operating Junction Temperature
Range
Symbol
Value
TSTG -55 to 150
TJ -55 to 125
Current Rating1
IPP 3
Unit
°C
ºC
kA
Note:
1. Rated IPP measured with 8/20μs pulse.
Functional Diagram
Bi-direcctional
Description
The AK3-Y series of high power TVS 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.
Features
• Recognized to UL 497B as
an Isolated Loop Circuit
Protector
• Both reflow and wave
soldering capable
• Very low clamping voltage
• Ultra compact: less
than one-tenth the size
of traditional discrete
solutions
•Sharp breakdown voltage
• Low slope resistance
• Bi-directional
• Foldback technology for
superior clamping factor
• Symmetric in leads width
for easier soldering during
assembly.
• IEC-61000-4-2 ESD
15kV(Air), 8kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
IEC 61000-4-4
•Halogen-free and RoHS
compliant
• Glass passivated junction
• Pb-free E4 means 2nd level
interconnect is Pb-free
and the terminal finish
material is silver
Electrical Characteristics (TA=25°C unless otherwise noted)
Part
Numbers
Part
Marking
Standoff
Voltage
V(VoSltOs)
Max.
Reverse
Leakage
(IR)µ@AVSO
AK3-015C-Y 3-015C
15
10
AK3-030C-Y
AK3-038C-Y
AK3-058C-Y
AK3-066C-Y
AK3-076C-Y
AK3-150C-Y
3-030C
3-038C
3-058C
3-066C
3-076C
3-150C
30
38
58
66
76
150
10
10
10
10
10
10
AK3-170C-Y 3-170C
170
10
AK3-190C-Y 3-190C 190
10
AK3-208C-Y
AK3-380C-Y
AK3-430C-Y
3-208C
3-380C
3-430C
208
380
430
10
10
10
Note:
1. Using 8/20μs wave shape as defined in IEC 61000-4-5.
Typical
8IR5O@C
(µA)
15
15
15
15
15
15
15
15
15
15
15
15
Reverse Breakdown
Voltage (VBR) @ IT
Min Volts Max Volts
16 19
32 37
40 46
64 70
72 80
85 95
158 194
179 220
200 245
223 246
401 443
440 490
Test
Current
IT
(mA)
10
10
10
10
10
10
10
10
10
10
10
10
Max. Clamping
Voltage
VCCuLr@renItpp(IPPPe) a(NkoPtuels1e)
VCL Volts
28
90
95
110
120
140
230
260
290
306
520
625
IPP Amps
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
Max.
Temp
Coefficient
OF VBR
Max.
Capacitance
0 Bias 10kHz
Agency
Approval
(%/OC)
(nF)
0.1 9.0 X
0.1 11.0 X
0.1 10.0
0.1 6.0 X
0.1 6.0 X
0.1 6.0 X
0.1 2.6 X
0.1 2.4 X
0.1 2.4 X
0.1 2.4 X
0.1 2.0 X
0.1 2.0 X
©2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/19/19
