TVS Diodes Datasheet
AK1 Series
Axial Leaded – 1kA
RoHS
Pb e4
Description
The AK1 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
■ Very low clamping voltage
■ Ultra compact: less than onetenth the size of traditional
discrete solutions
■ Sharp breakdown voltage
Additional Information
■ Low slope resistance
■ Symmetric in leads width
for easier soldering during
assembly.
Accessories
■ EFT protection of data lines in
accordance with IEC 610004-4
■ Halogen-free
■ Bi-directional
■ IEC 61000-4-2 ESD 15kV(Air),
8kV (Contact)
Resources
■ ESD protection of data lines
in accordance with IEC
61000-4-2
Samples
■ RoHS compliant
■ Glass passivated junction
■ Pb-free E4 means 2nd level
interconnect is Pb-free and
the terminal finish material
is Silver
Agency Approvals
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
Agency
Agency File/Certificate Number
E128662
Symbol
Value
Unit
Operating Storage Temperature
Range
TSTG
-55 to 150
°C
Operating Junction Temperature
Range
TJ
-55 to 125
ºC
Current Rating1
IPP
1
kA
Functional Diagram
Note:
1. Rated IPP measured with 8/20μs pulse.
Bi-direcctional
Electrical Characteristics (TA=25°C unless otherwise noted)
Part
Numbers
Part
Marking
AK1 - 076C 1-076C
Standoff
Voltage
(VSO)
Volts
Max.
Reverse
Leakage
(IR) @VSO
µA
Typical
IR @
85OC
(µA)
76
10
15
Reverse Breakdown
Voltage (VBR) @ IT
Test
Current
IT
Max. Clamping
Max. Temp
Voltage
Coefficient
VCL @ Ipp Peak Pulse
OF VBR
Current (IPP) (Note 1)
Max.
Capacitance
0 Bias 10kHz
Min Volts
Max Volts
(mA)
VCL Volts
IPP Amps
(%/OC)
(nF)
85
95
10
140
1,000
0.1
8.5
Agency
Approval
X
Note: 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. 05/26/21
TVS Diodes Datasheet
AK1 Series
Axial Leaded – 1kA
Flow/Wave Soldering (Solder Dipping)
Physical Specifications
Weight
Contact manufacturer
Case
Epoxy encapsulated
Terminal
Silver plated leads, solderable per
MIL-STD-750 Method 2026
Peak Temperature :
265OC
Dipping Time :
10 seconds
Soldering :
1 time
Wave Solder Profile
Figure 1 Non Lead-free Profile
Figure 2 Lead-free Profile
300
300
250
250
200
Temperature (ºC)
Temperature (ºC)
Maximum Wave 260C
Maximum Wave 240C
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 3 Peak Power Derating
Figure 4 Typical Peak Pulse Power Rating Curve
8/20µs
80
PPPM-Peak Pulse Power (kW)
Percent of Rated Value
1000
100
60
40
20
0
0
25
50
75
100
100
10/350µs
10/1000µs
10
1
125
TJ - Initial Junction Temperature (°C)
0.00001
0.0001
0.001
td-Pulse Width (sec.)
continues on next page.
2
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 05/26/21
TVS Diodes Datasheet
AK1 Series
Axial Leaded – 1kA
Ratings and Characteristic Curves (TA=25°C unless otherwise noted) (Continued)
Figure 5 Typical VBR Vs Junction Temperature
Figure 6 Pulse Waveform
8
IPP – Peak Pulse Current – %IPP
Percent of VBR Change
12
10
6
4
2
0
-2
-4
-6
-8
-50
-25
0
25
50
75
100
Peak
Value
100
tr = rise time to peak value
td = decay time to half value
tr x td =8/20µs
50
Half Value
0
125
0
Junction Temperature(Tj )
tr
td
t – Time (µs)
Dimensions
A
L2
G
Dimensions
F
L1
A
B
C
D
E
F
G
L1/L2
D
C
B
E
C
Part Marking System
Inches
Millimeters
0.950 +/- 0.040
24.15 +/- 1.00
0.095 +/- 0.024
2.4 +/- 0.60
0.236 +/- 0.039
6.00 +/- 1.00
0.570 max.
14.48 max.
0.050 +/- 0.002
1.270 +/- 0.05
0.500 max.
12.70 max.
0.096 +/- 0.040
2.44 +/- 1.00
L1= L2 tolerance +/- 0.04 inch (1.0 mm)
Part Numbering System
Marking Code
AK1 - XXXX
1-XXXX
Stand Off Voltage
Series Type
LF
(Please Refer to Electrical
Characteristics Chart)
YWW
Littelfuse Logo
Packing Options
Trace Code Marking
Y:Year Code
WW: Working Week Code
Side View
Part Number
Component
Package
Quantity
Packaging
Option
AK1-XXXX
AK1-XXXX-12
AK Package
AK Package
56pcs/Box
12pcs/Box
Bulk
Bulk
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are
not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
3
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 05/26/21
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