TVS Diodes
Surface Mount – SLD8S series
RoHS
SLD8S Series
Description
Pb
e3
The SLD8S Series TVS Diode is housed in a SMTO-263
package with lead modifications. It is designed to protect
sensitive electronics against lightning and inductive load
switching voltage transient events for severe Automotive
Load Dump applications.
Features
• AEC-Q101 qualified
• SMTO-263 package, and
foot print is compatible to
industrial popular DO-
218AB package
• Meet ISO7637-2 5a/5b
protection and ISO16750
load dump test (refer to
APP note for details)
• V
BR
@ T
J
= V
BR
@25°C
x (1+
α
T x (T
J
- 25))
(
α
T:Temperature
Coefficient, typical value is
0.1%
• Glass passivated chip
junction in modified TO-
263 package
• ESD protection of data
lines in accordance with
IEC 61000-4-2, 30kV(Air),
30kV(Contact)
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Fast response time:
typically less than 1.0ps
from 0 Volts to BV min
• Excellent clamping
capability
• Low incremental surge
resistance
• UL Recognized compound
meeting flammability
rating V-0
• Meets MSL level 1, per
J-STD-020, LF maximun
peak of 260
°
C
• For surface mounted
applications to optimize
board space
• Low profile package
• High temperature
to reflow soldering
guaranteed: 260°C/10sec
at terminals
• Matte tin lead–free plated
• Halogen free and RoHS
compliant
• Pb-free E3 means 2nd
level interconnect is Pb-
free and the terminal finish
material is tin (Sn) (IPC/
JEDEC J-STD-609A.01)
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E230531
Maximum Ratings and Thermal Characteristics
(T
A
=25
O
C unless otherwise noted)
Parameter
Peak Pulse Power Dissipation
1. 10ms x 150ms test waveform
2. 10/1000 test waveform
Power dissipation on infinite
heatsink at T
C
= 25 °C
Maximum Instantaneous Forward
Voltage at 100A for Unidirectional
only
Peak forward surge current 8.3m
single half sine-wave
Operating Junction and Storage
Temperature Range
Typical Thermal Resistance Junction
to case
P
D
V
F
I
FSM
T
J
, T
STG
R
θJC
Symbol
P
PPM
Value
2200
7000
8.0
1.8
1000
-55 to 175
0.9
Unit
W
W
W
V
A
°C
°C/W
Functional Diagram
Bi-directional
Applications
Designed to protect sensitive electronics from:
Cathode
Uni-directional
Anode
- Inductive Load Switching
- Alternator Load Dump
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
Electrical Characteristics
(T =25°C unless otherwise noted)
A
Part
Number
(Uni)
SLD8S12A
SLD8S13A
SLD8S14A
SLD8S15A
SLD8S16A
SLD8S17A
SLD8S18A
SLD8S20A
SLD8S22A
SLD8S24A
SLD8S26A
SLD8S27A
SLD8S28A
SLD8S30A
SLD8S33A
SLD8S36A
SLD8S40A
SLD8S43A
SLD8S48A
SLD8S57A
Notes:
Breakdown
Voltage V
BR
@ I
T
(V)
MIN
13.3
14.4
15.6
16.7
17
.8
18.9
20.0
22.2
24.4
26.7
28.9
29.9
31.1
33.3
36.7
40.0
44.4
47
.8
53.3
63.8
MAX
14.7
15.9
17
.2
18.5
19.7
20.9
22.1
24.5
26.9
29.5
31.9
33.1
34.4
36.8
40.6
44.2
49.1
52.8
58.9
69.9
Test
Current
I
T
(mA)
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Reverse
Stand off
Voltage V
R
(Volts)
12
13
14
15
16
17
18
20
22
24
26
27
28
30
33
36
40
43
48
57
Maximum
Reverse
Leakage
I
R
@ V
R
(µA)
10
10
10
10
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
T
J
=150
O
C
Max. Reverse
Leakage
I
R
@ V
R
(µA)
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
Maximum
Peak Pulse
Surge
Current I
pp
(A)
352
326
301
286
269
253
240
216
197
180
167
160
154
144
132
121
108
101
89.7
75.5
Maximum
Clamping
Voltage
V
C
@ I
PP
(V)
19.9
21.5
23.2
24.4
26.0
27
.6
29.2
32.4
35.5
38.9
42.1
43.6
45.4
48.4
53.3
58.1
64.5
69.4
77
.4
92.7
Agency
Approval
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1. V
BR
measured after I
T
applied for 300µs, I
T
= square wave pulse or equivalent.
2. Surge current waveform per 10/1000 exponential wave and derated per Fig. 2
3. All terms and symbols are consistent with ANSI/IEEE C62.35.
Load Dump Test Wave Form
Parameter
U
S
R
i
t
d
t
r
12V system
65v to 87V
0.5Ω to 4Ω
40 ms to 400 ms
24V system
123V to 174V
1Ω to 8Ω
100 ms to 350 ms
0
(10
-5
)ms
Note: LF use td=400ms for 12V system test; td=350ms for 24V system
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
I-V Curve Characteristics
Uni-directional
P
PPM
Peak Pulse Power Dissipation
-- Max power dissipation
V
R
Stand-off Voltage
-- Maximum voltage that can be applied to the
TVS without operation
V
BR
Breakdown Voltage
-- Maximum voltage that flows though the
TVS at a specified test current (I
T
)
V
C
Clamping Voltage
-- Peak voltage measured across the TVS at a
specified Ippm (peak impulse current)
I
R
Reverse Leakage Current
-- Current measured at V
R
V
F
Forward Voltage Drop for Uni-directional
Vc V
BR
V
R
I
R
V
F
I
T
V
I
pp
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
A
Figure 1 - Peak Pulse Current Rating Curve
Figure 2 - Peak Pulse Power Derating Curve
100
100
P
PPM
-Peak Pulse Power(kW)
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
80
60
40
20
0
10
1
0.1
0.01
0.1
1
t
d
-Pulse Width (ms)
10
100
0
25
50
75
100
125
150
175
T
J
- Initial Junction Temperature (ºC)
Figure 3 - Typical Transient Thermal Impedance
100
C
Trans ient T hermal Impedanc e (° /W)
R
θJA
10
1
R
θJC
0.1
0.01
0.01
0.1
1
10
100
t - Pulse Width (s)
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
Figure 4 - Typical SOA Chart
0.50
ISO7637 5A 12V Test System
0.50
ISO7637 5A 12V Test System
0.75
SLD12A
SLD15A
0.75
SLD20A
SLD24A
Ri(ohm)
1.25
Td:400ms
Ri(ohm)
1.00
1.00
1.25
Td:400ms
1.50
1.50
1.75
65
70
75
80
85
1.75
65
70
75
80
85
Vs(volt)
Vs(volt)
Figure 5 - Typical Junction Capacitance
1.5
ISO7637 5A 24V Test System
100
Uni-directional
2.0
SLD30A
SLD36A
Ri(ohm)
2.5
Cj (nF)
10
Uni-directional @ V
R
3.0
Td:350ms
3.5
4.0
1
123
133
143
153
163
173
10
V
BR
- Reverse Breakdown Voltage (V)
100
Vs(volt)
Note: SOA (Safe Operation Area) refer to the area which below the curve line and refer to
APP note for details.
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp) (T
L
)
to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Time ( min to max) (T
S)
Pb – Free assembly
T
P
Temperature
t
P
Ramp-up
150°C
200°C
60 – 180 secs
5°C/second max
5°C/second max
217°C
60 – 150 seconds
260
+0/-5
°C
20 – 40 seconds
5°C/second max
8 minutes Max.
260°C
T
L
T
S(max)
t
L
Preheat
Ramp-do
Ramp-down
T
S(min)
t
S
time to peak temperature
25
Time
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
Physical Specifications
Terminal Finish
Body Material
Lead Material
100% Matte Tin-plated
UL Recognized compound meeting
flammability rating V-0
Copper Alloy
Environmental Specifications
High Temp. Storage
HTRB
Temperature Cycling
MSL
H3TRB
RSH
JESD22-A103
JESD22-A108
JESD22-A104
JEDEC-J-STD-020, LEVEL 1
JESD22-A101
JESD22-A111
Dimensions
B
F
G
Dimensions
H
A
Inches
Min
0.568
0.380
0.098
0.169
0.102
0.178
0.045
0.360
0.106
0.069
0.284
0
Max
0.600
0.420
0.114
0.189
0.118
0.188
0.060
0.370
0.122
0.089
0.300
0.010
Millimeters
Min
14.44
9.65
2.50
4.30
2.60
4.52
1.14
9.14
2.69
1.75
7
.22
0
Max
15.24
10.67
2.90
4.80
3.00
4.78
1.52
9.40
3.09
2.25
7
.62
0.25
A
B
E
D
J
U
C
D
I
C
TOP VIEW
SIDE VIEW
E
F
0.413
(10.50)
AREA: 0.1 IN2
.1
0.085
(2.16)
G
H
I
J
M
U
0.331
0.276 (8.41)
(7
.01)
0.276
(7
.01)
0.032
(0.81)
0.091
(2.30)
0.350
(8.89)
0.601
(15.27)
M
0.320
(8.13)
BOTTOM VIEW
0.118
(3.00)
RECOMMEND SOLDERING
PAD OUTLINE
Part Numbering System
Part Marking System
SLD 8 S XX A
Date Code Marking
5% Voltage Tolerance
Littelfuse Logo
Cathode Band
F
SLD8SXXX
YMXXX
Y: Year Code
M: Month Code
XXX:Lot Code
Voltage
SMTO-263 package
Power Dissipation
Series Code
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
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