AK3 Series - Littelfuse

TVS Diodes
Axial Leaded – 3kA > AK3 series
AK3 Series
RoHS
Pb e4
Description
The AK3 series of high current transient suppressors have
been specially designed for use in A.C. line protection and
any demanding applications (AC or DC). They offer superior
clamping characteristics over standard S.A.D. technologies
by virtue of the Littelfuse Foldbak technology. Therefore,
any voltage rise due to increased current conduction is
contained to a minimum, providing the best possible
protection level. They can also be connected in series and/
or parallel to create very high capacity protection solutions.
Agency Approvals
Features
AGENCY
• Very low clamping voltage
• 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
• Symmetric in leads width
for easier soldering during
assembly.
AGENCY FILE NUMBER
E128662
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter
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
• IEC-61000-4-2 ESD
15kV(Air), 8kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2 (IEC801-2)
• EFT protection of data
lines in accordance with
IEC 61000-4-4 (IEC801-4)
• Halogen-free
• RoHS compliant
• Glass passivated junction
• 2nd level interconnect is
Pb-free per IPC/JEDEC
J-STD-609A.01
Note:
1. Rated IPP measured with 8/20μs pulse.
Functional Diagram
Bi-direcctional
Electrical Characteristics (T =25°C unless otherwise noted)
A
Part
Numbers
AK3 - 015C
AK3 - 030C
AK3 - 058C
AK3 - 066C
AK3 - 076C
AK3 - 150C
AK3 - 170C
AK3 - 208C
AK3 - 380C
AK3 - 430C
Max.
Standoff
Reverse
Part
Voltage
Leakage
Marking
(VSO)
(IR) @VSO
Volts
µA
3 - 015C
3 - 030C
3 - 058C
3 - 066C
3 - 076C
3 - 150C
3 - 170C
3 - 208C
3 - 380C
3 - 430C
15
30
58
66
76
150
170
208
380
430
10
10
10
10
10
10
10
10
10
10
Max. Clamping
Max.
Max.
Typical Reverse Breakdown Test
Agency
Voltage
Temp
Current
Capacitance Approval
IR @
Voltage (VBR) @ IT
VCL @ Ipp Peak Pulse Coefficient
IT
0 Bias 10kHz
85OC
Current (IPP) (Note 1)
OF VBR
(µA)
Min Volts Max Volts (mA)
VCL Volts IPP Amps
(%/OC)
(nF)
15
15
15
15
15
15
15
15
15
15
16
32
64
72
85
158
179
223
401
440
19
37
70
80
95
194
220
246
443
490
10
10
10
10
10
10
10
10
10
10
28
90
110
120
140
230
260
262
520
625
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
9.0
11.0
6.0
6.0
6.0
2.6
2.4
2.4
2.0
2.0
X
X
X
X
X
X
X
X
X
Note:
1. Using 8/20µS wave shape as defined in IEC 61000-4-5.
AK3 Series
164
©2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/09/14
TVS Diodes
Axial Leaded – 3kA > AK3 series
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
TEMPERATURE (ºC)
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
200
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 (T =25°C unless otherwise noted)
A
Figure 4 - Surge Response
100
80
Current (kA)
Percent of Rated Value
Figure 3 - Peak Power Derating
60
40
20
0
0
25
50
75
100
125
Voltage (V)
TA-Ambient Temperature(°C)
continues on next page.
AK3 Series
165
©2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/09/14
TVS Diodes
Axial Leaded – 3kA > AK3 series
Ratings and Characteristic Curves (T =25°C unless otherwise noted) (Continued)
A
Figure 5 - Typical Peak Pulse Power Rating Curve
12
10
8/20µs
10/350µs
100
8
Percent of VBR Change
PPPM-Peak Pulse Power (kW)
1000
Figure 6 - Typical VBR Vs Junction Temperature
AK3-076C
10/1000µs
10
1
6
4
2
0
-2
-4
-6
-8
0.1
0.00001
0.0001
-50
0.001
-25
0
25
50
75
100
125
Junction Temperature(Tj )
td-Pulse Width (sec.)
Figure 8 - Pulse Waveform
Figure 7 -Surge Response (8/20 Surge current waveform)
IPP – Peak Pulse Current – %IPP
Voltage
Current
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.
Peak
Value
100
tr = rise time to peak value
td = decay time to half value
tr x td =8/20µs
50
Half Value
0
0
tr
td
t – Time (µs)
Dimensions
Dimensions
A
G
L2
F
L1
D
C
B
AK3 Series
C
Inches
Millimeters
-015C
0.951 +/- 0.040
0.094 +/- 0.024
0.236 +/- 0.039
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
11.0 max.
1.27 +/- 0.05
9.50 max.
2.36 +/- 1.00
-030C/-066C
0.130 +/- 0.047
3.30 +/- 1.20
A
B
C
D
E
F
E
G
166
-058C/-076C
0.168 +/- 0.047
4.27 +/- 1.20
-150C
0.383 +/- 0.047
9.72 +/- 1.20
-170C
0.420 +/- 0.047
10.67 +/- 1.20
-380C
0.547 +/- 0.047
13.90 +/- 1.20
-430C
0.583 +/- 0.047
14.80 +/- 1.20
L1= L2 tolerance +/- 0.047 inch (+/- 1.20 mm)
L1/L2
©2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/09/14
TVS Diodes
Axial Leaded – 3kA > AK3 series
Part Marking System
Part Marking
YWW
Trace Code Marking
Y:Year Code
WW: Working Week Code
Apply to P/N listed below:
AK3-150C
AK3-170C
AK3-208C
AK3-380C
AK3-430C
3-xxxx
LF
Littelfuse Logo
LF YWW
3-XXXX
Littelfuse Logo
Apply to P/N listed below:
AK3-015C
AK3-030C
AK3-058C
AK3-066C
AK3-076C
Trace Code Marking
Part Marking
Y:Year Code
WW: Working Week Code
Type 1- Side View
Type 2 - Top View
Packing Options
Part Numbering System
AK3 - XXXX
Series Type
Stand Off Voltage
(Please Refer to Electrical
Characteristics Chart)
AK3 Series
167
Part Number
Component
Package
Quantity
Packaging
Option
AK3-XXXX
AK Package
56pcs/Box
Bulk
AK3-XXXX-12
AK Package
12pcs/Box
Bulk
©2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/09/14