TVS Diodes Datasheet
AK3 Series
Axial Leaded – 3kA
RoHS
Pb
e4
Description
The AK3 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 over traditional metal oxide varistor (
MOV ) solutions. They can be connected in series and / or parallel
to create a very high surge current protection solution.
Features & Benefits
■ Very low clamping voltage
■ Ultra compact: less than onetenth the size of traditional
discrete solutions
■ Sharp breakdown voltage
■ Low slope resistance
Additional Information
■ RoHS compliant
■ Glass passivated junction
■ Symmetric in leads width
for easier soldering during
assembly.
Accessories
■ IEC 61000-4-2 ESD 15kV(Air),
8kV (Contact)
Samples
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
■ EFT protection of data lines in
accordance with IEC 610004-4
■ Halogen-free
■ Bi-directional
■ FoldbakTM technology for
superior clamping factor
Resources
■ ESD protection of data lines
in accordance with IEC
61000-4-2
■ Pb-free E4 means 2nd level
interconnect is Pb-free and
the terminal finish material
is Silver
Agency Approvals
Symbol
Value
Unit
Operating Storage Temperature Range
TSTG
-55 to 150
°C
Operating Junction Temperature Range
TJ
-55 to 125
ºC
Current Rating1
IPP
3
kA
Agency
Agency File Number
E128662
Functional Diagram
Note:
1. Rated IPP measured with 8/20μs pulse.
Bi-direcctional
Electrical Characteristics (TA=25°C unless otherwise noted)
Part
Numbers
AK3 - 015C
AK3 - 030C
AK3 - 038C
AK3 - 058C
AK3 - 066C
AK3 - 076C
AK3 - 150C
AK3 - 170C
AK3 - 190C
AK3 - 208C
AK3 - 380C
AK3 - 430C
Part
Marking
3 - 015C
3 - 030C
3 - 038C
3 - 058C
3 - 066C
3 - 076C
3 - 150C
3 - 170C
3 - 190C
3 - 208C
3 - 380C
3 - 430C
Standoff
Voltage
(VSO)
Volts
15
30
38
58
66
76
150
170
190
208
380
430
Max.
Reverse
Leakage
(IR) @VSO
µA
Typical
IR @
85OC
(µA)
10
10
10
10
10
10
10
10
10
10
10
10
15
15
15
15
15
15
15
15
15
15
15
15
Reverse Breakdown
Voltage (VBR) @ IT
Test
Max. Clamping Voltage Max. Temp
Current VCL @ Ipp Peak Pulse Coefficient
Current (IPP) (Note 1)
IT
OF VBR
Max.
Capacitance
0 Bias 10kHz
Min Volts
Max Volts
(mA)
VCL Volts
IPP Amps
(%/OC)
(nF)
16
32
40
64
72
85
158
179
200
223
401
440
19
37
46
70
80
95
194
220
245
246
443
490
10
10
10
10
10
10
10
10
10
10
10
10
28
90
95
110
120
140
230
260
290
306
520
625
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
12.0
11.0
10.0
6.0
6.0
6.0
2.6
2.4
2.4
2.4
2.0
2.0
Agency
Approval
X
X
X
X
X
X
X
X
X
X
X
Note: 1. Using 8/20µS wave shape as defined in IEC 61000-4-5.
1
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 06/22/21
TVS Diodes Datasheet
AK3 Series
Axial Leaded – 3kA
Flow/Wave Soldering (Solder Dipping)
Physical Specifications
Weight
Contact manufacturer
Peak Temperature :
265OC
Case
Epoxy encapsulated
Dipping Time :
10 seconds
Terminal
Silver plated leads, solderable per MIL-STD-750
Method 2026
Soldering :
1 time
Wave Solder Profile
Figure 2:
Lead-free Profile
Figure 1:
Non Lead-free Profile
300
300
Maximum Wave 240C
Maximum Wave 260C
250
200
Temperature (ºC)
Temperature (ºC)
250
150
100
50
200
150
100
50
0
0
0. 5
1
1. 5
2
2. 5
3
3. 5
0
4
0
Time (Minutes)
0.5
1
1.5
2
2.5
3
3.5
4
Time (Minutes)
Ratings and Characteristic Curves (TA=25°C unless otherwise noted)
Figure 4:
Surge Response
Figure 3:
Peak Power Derating
80
Current (kA)
Percent of Rated Value
100
60
40
20
0
0
25
50
75
100
125
Voltage (V)
T J -Initial Junction Temperature (ºC)
2
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 06/22/21
TVS Diodes Datasheet
AK3 Series
Axial Leaded – 3kA
Ratings and Characteristic Curves (TA=25°C unless otherwise noted) (Continued)
Figure 6:
Typical VBR Vs Junction Temperature
Figure 5:
Typical Peak Pulse Power Rating Curve
12
10
10000
8
AK3-430
1000
10/350µs
AK3-380
100
6
Percent of VBR Change
Pppm -Peak Pulse Power(kW)
8/20µs
10/1000µs
AK3-076
4
2
0
-2
-4
10
-6
-8
1
0.00001
0.0001
td -Pulse Width(sec)
-50
0.001
-25
0
25
50
75
100
125
Junction Temperature(Tj )
Figure 7:
Surge Response (8/20 Surge current waveform)
Figure 8:
Pulse Waveform
IPP – Peak Pulse Current – %IPP
Voltage
Current
Peak
Value
100
tr x td =8/20µs
50
Half Value
0
0
Time (µs)
tr = rise time to peak value
td = decay time to half value
tr
td
t – Time (µs)
Note: The power dissipation causes a change in avalanche voltage during the surge and the avalanche voltage
eventually returns to the original value when the transient has passed.
3
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 06/22/21
TVS Diodes Datasheet
AK3 Series
Axial Leaded – 3kA
Part Marking System
Part Marking
Trace Code Marking
Y:Year Code
WW: Working Week Code
3-xxxx
YWW
YWW
LF
Littelfuse Logo
LF
3-XXXX
Littelfuse Logo
Apply to P/N listed below:
AK3-015C
AK3-030C
AK3-038C
AK3-058C
AK3-066C
AK3-076C
Y:Year Code
WW: Working Week Code
Type 1- Side View
Type 2 - Top View
Part Numbering System
Packing Options
AK3 - XXXX
Series Type
Part Marking
Trace Code Marking
Apply to P/N listed below:
AK3-150C
AK3-170C
AK3-190C
AK3-208C
AK3-380C
AK3-430C
Part Number
Stand Off Voltage
Component Package
Quantity
Packaging Option
AK3-XXXX
AK Package
56pcs/Box
Bulk
AK3-XXXX-12
AK Package
12pcs/Box
Bulk
(Please Refer to Electrical
Characteristics Chart)
Dimensions
Dimensions
A
G
L2
A
B
F
L1
C
D
C
B
C
-208C
D
E
F
-015C
E
-030C/-038C/-066C
G
-058C/-076C
-150C
-170C/-190C
-208C
-380C
-430C
-208C
L1
-208C
L2
Inches
Millimeters
0.951 +/- 0.040
0.094 +/- 0.024
0.236 +/- 0.039
0.145 +/- 0.040
0.433 max.
0.050 +/- 0.002
0.374 max.
0.093 +/- 0.039
24.15 +/- 1.00
2.40 +/- 0.60
6.00 +/- 1.00
3.68 +/- 1.00
11.0 max.
1.27 +/- 0.05
9.50 max.
2.36 +/- 1.00
0.130 +/- 0.047
3.30 +/- 1.20
0.168 +/- 0.047
4.27 +/- 1.20
0.383 +/- 0.047
9.72 +/- 1.20
0.420 +/- 0.047
10.67 +/- 1.20
0.358 +/- 0.047
9.10 +/- 1.20
0.547 +/- 0.047
13.90 +/- 1.20
0.583 +/- 0.047
14.80 +/- 1.20
0.296 +/- 0.047
7.52 +/- 1.20
L1= L2 tolerance +/- 0.047 inch (+/- 1.20
mm)
= A - (G+L1) tolerance +/- 0.047 inch (+/1.20 mm)
L1= L2 tolerance +/- 0.047 inch (+/- 1.20
mm)
Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications,
devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth
in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for
any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and
Conditions of Sale, unless otherwise agreed by Littelfuse. “Littelfuse” includes Littelfuse, Inc., and all of its affiliate entities. http://www.littelfuse.com/disclaimer-electronics
4
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 06/22/21
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