©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
AGENCY AGENCY FILE NUMBER
E230531
Designed to protect sensitive electronics from:
- Inductive Load Switching
- Alternator Load Dump
Applications
Features
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.
Description
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Agency Approvals
• 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)
• VBR @ TJ= VBR@25°C
x (1+αT x (TJ - 25))
(αT: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)
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
SLD8S Series RoHS
Pb
e3
Parameter Symbol Value Unit
Peak Pulse Power Dissipation
1. 10ms x 150ms test waveform PPPM
2200 W
2. 10/1000 test waveform 7000 W
Power dissipation on infinite
heatsink at TC = 25 °C PD8.0 W
Maximum Instantaneous Forward
Voltage at 100A for Unidirectional
only
VF1. 8 V
Peak forward surge current 8.3m
single half sine-wave IFSM 1000 A
Operating Junction and Storage
Temperature Range TJ, TSTG -55 to 175 °C
Typical Thermal Resistance Junction
to case RθJC 0.9 °C/W
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
Part
Number
(Uni)
Breakdown
Voltage VBR @ IT
(V)
Test
Current
IT
(mA)
Reverse
Stand off
Voltage VR
(Volts)
Maximum
Reverse
Leakage
IR@ VR
(µA)
TJ=150OC
Max. Reverse
Leakage
IR@ VR
(µA)
Maximum
Peak Pulse
Surge
Current Ipp
(A)
Maximum
Clamping
Voltage
VC @ IPP
(V)
Agency
Approval
MIN MAX
SLD8S12A 13.3 14.7 5.0 12 10 50 352 19.9 X
SLD8S13A 14.4 15.9 5.0 13 10 50 326 21.5 X
SLD8S14A 15.6 1 7. 2 5.0 14 10 50 301 23.2 X
SLD8S15A 16.7 18.5 5.0 15 10 50 286 24.4 X
SLD8S16A 1 7. 8 19.7 5.0 16 2.0 50 269 26.0 X
SLD8S17A 18.9 20.9 5.0 17 2.0 50 253 27.6 X
SLD8S18A 20.0 22.1 5.0 18 2.0 50 240 29.2 X
SLD8S20A 22.2 24.5 5.0 20 2.0 50 216 32.4 X
SLD8S22A 24.4 26.9 5.0 22 2.0 50 197 35.5 X
SLD8S24A 26.7 29.5 5.0 24 2.0 50 180 38.9 X
SLD8S26A 28.9 31.9 5.0 26 2.0 50 167 42.1 X
SLD8S27A 29.9 33.1 5.0 27 2.0 50 160 43.6 X
SLD8S28A 31.1 34.4 5.0 28 2.0 50 154 45.4 X
SLD8S30A 33.3 36.8 5.0 30 2.0 50 144 48.4 X
SLD8S33A 36.7 40.6 5.0 33 2.0 50 132 53.3 X
SLD8S36A 40.0 44.2 5.0 36 2.0 50 121 58.1 X
SLD8S40A 44.4 49.1 5.0 40 2.0 50 108 64.5 X
SLD8S43A 47.8 52.8 5.0 43 2.0 50 101 69.4 X
SLD8S48A 53.3 58.9 5.0 48 2.0 50 89.7 77.4 X
SLD8S57A 63.8 69.9 5.0 57 2.0 50 75.5 92.7 X
Notes:
1. V BR measured after IT applied for 300µs, IT= 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.
Electrical Characteristics (TA=25°C unless otherwise noted)
Load Dump Test Wave Form
Note: LF use td=400ms for 12V system test; td=350ms for 24V system
Parameter 12V system 24V system
US65v to 87V 123V to 174V
Ri0.5Ω to 4Ω 1Ω to 8Ω
td40 ms to 400 ms 100 ms to 350 ms
tr(10 -5 )ms
0
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
0.1
1
10
100
0.01 0.11 10 100
P
PPM
-Peak Pulse Power(kW)
t
d
-Pulse Width (ms)
Ratings and Characteristic Curves (TA=25°C unless otherwise noted)
Figure 1 - Peak Pulse Current Rating Curve Figure 2 - Peak Pulse Power Derating Curve
I-V Curve Characteristics
Vc VBR VR
IR
IT
Ipp
V
Uni-directional
VF
PPPM Peak Pulse Power Dissipation -- Max power dissipation
VR Stand-off Voltage -- Maximum voltage that can be applied to the
TVS without operation
VBR Breakdown Voltage -- Maximum voltage that flows though the
TVS at a specified test current (IT)
VC Clamping Voltage -- Peak voltage measured across the TVS at a
specified Ippm (peak impulse current)
IR Reverse Leakage Current -- Current measured at VR
VF Forward Voltage Drop for Uni-directional
0
20
40
60
80
100
0255075100 125 150 175
TJ - Initial Junction Temperature (ºC)
Peak Pulse Power (P
PP) or Current (IPP)
Derating in Percentage
%
t - Pulse Width (s)
narT s )W/C°( ecnadepmI lamrehT tnei
100
10
1
0.1
0.01
0.01 0.11 10 100
R
θJC
R
θJA
Figure 3 - Typical Transient Thermal Impedance
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
Soldering Parameters
Time
Temperature
TP
TL
TS(max)
TS(min)
25
t
P
tL
tS
time to peak temperature
Preheat
P
r
e
h
eat
Ramp-upRamp-up
Ramp-down
R
am
p
-
do
Reflow Condition Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min)) 150°C
- Temperature Max (Ts(max)) 200°C
- Time (min to max) (ts) 60 – 180 secs
Average ramp up rate (Liquidus Temp) (TL)
to peak 5°C/second max
TS(max) to TL - Ramp-up Rate 5°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Time ( min to max) (TS) 60 – 150 seconds
Peak Temperature (TP) 260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 5°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
Do not exceed 260°C
Figure 5 - Typical Junction Capacitance
1
10
100
10 100
V
BR
- Reverse Breakdown Voltage (V)
Cj (nF)
Uni-directional @ V
R
Uni-directional
Figure 4 - Typical SOA Chart
0.50
0.75
1.00
1.25
1.50
1.75
65 70 75 80 85
Ri(ohm)
Vs(volt)
ISO7637 5A 12V Test System
SLD12A
SLD15A
Td:400ms
0.50
0.75
1.00
1.25
1.50
1.75
65 70 75 80 85
Ri(ohm)
Vs(volt)
ISO7637 5A 12V Test System
SLD20A
SLD24A
Td:400ms
1.5
2.0
2.5
3.0
3.5
4.0
123 133 143 153 173
Ri(ohm)
Vs(volt)
ISO7637 5A 24V Test System
SLD30A
SLD36A
163
Td:350ms
Note: SOA (Safe Operation Area) refer to the area which below the curve line and refer to
APP note for details.
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
Part Numbering System
Power Dissipation
Voltage
5% Voltage Tolerance
Series Code
SLD 8XX A
S
SMTO-263 package
Part Marking System
Dimensions
B
A
C
ED
F
G
H
M
I
J
0.413
(10.50)
0.601
(15.27)
0.350
(8.89)
0.276
(7.01)
0.085
(2.16)
0.091
(2.30)
0.118
(3.00)
TOP VIEW SIDE VIEW
BOTTOM VIEW RECOMMEND SOLDERING
PAD OUTLINE
0.032
(0.81)
U
0.331
(8.41)
0.276
(7.01)
0.320
(8.13)
AREA: 0..11 IN2
Physical Specifications
Terminal Finish 100% Matte Tin-plated
Body Material UL Recognized compound meeting
flammability rating V-0
Lead Material Copper Alloy
Environmental Specifications
High Temp. Storage JESD22-A103
HTRB JESD22-A108
Temperature Cycling JESD22-A104
MSL JEDEC-J-STD-020, LEVEL 1
H3TRB JESD22-A101
RSH JESD22-A111
Dimensions
Inches Millimeters
Min Max Min Max
A 0.568 0.600 14.44 15.24
B 0.380 0.420 9.65 10.67
C 0.098 0.114 2.50 2.90
D 0.169 0.189 4.30 4.80
E 0.102 0.118 2.60 3.00
F 0.178 0.188 4.52 4.78
G 0.045 0.060 1.14 1.52
H 0.360 0.370 9.14 9.40
I 0.106 0.122 2.69 3.09
J 0.069 0.089 1.75 2.25
M 0.284 0.300 7.22 7.62
U 0 0.010 0 0.25
©2016 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/30/18
TVS Diodes
Surface Mount – SLD8S series
0.512 (13.0) Arbor
Hole Dia.
0.945
(24.0)
0.63
(16.0)
1.01
(25.7)
12.99
(330.0)
0.827
(21.0)
0.157
(4.0)
Direction of Feed
Dimensions
are in inches
(and millimeters).
*
* Cover tape
0.059 DIA
(1.5)
SMTO-263 Embossed Carrier Reel Pack (RP) Specifications
Meets all EIA-481-2 Standards
Packaging
Part Number Component
Package Quantity Packaging
Option
SLD8SxxA SMTO-263 500 Embossed Carrier