# TVS Diode, SLD8S Series, Unidirectional, 28 V, 45.4 V, DO-218AB, 2 Pins

![Product image](https://novapart.co/image/farnell:3930033/)

**URL**: https://novapart.co/products/SLD8S28A/tvs-diode-sld8s-series-unidirectional-28-v-454-do
**SKU**: SLD8S28A
**Manufacturer**: LITTELFUSE
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €1.7700
**Stock**: 200+
**Lead Time**: 2 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| No. Of Pins | 2Pins |
| Tvs Polarity | Unidirectional |
| Product Range | SLD8S Series |
| Qualification | AEC-Q101 |
| Diode Mounting | Surface Mount |
| Diode Case Style | DO-218AB |
| Clamping Voltage Max | 45.4V |
| Reverse Standoff Voltage | 28V |
| Maximum Breakdown Voltage | 34.4V |
| Minimum Breakdown Voltage | 31.1V |
| Operating Temperature Max | 175°C |
| Peak Pulse Power Dissipation | 7kW |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3930033/)

TVS Diodes **Datasheet** 

**SLD8S Series** Surface Mount 

## RoHS Pb **e3** HF LJ WOO 

## **Description** 

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 & Benefits** 

## **Agency Approvals** 

|**Parameter**<br>Peak Pulse Power Dissipation<br>1. 10ms x 150ms test waveform|**Symbol**<br>PPPM|**Value**<br>2200|**Unit**<br>W|
|---|---|---|---|
|2. 10/1000 test waveform||7000|W|
|Power dissipation on infinite heatsink at<br>TC= 25 °C|PD|8.0|W|
|Maximum Instantaneous Forward Voltage<br>at 100A for Unidirectional only|VF|1.8|V|
|Peak forward surge current 8.3m single<br>half sine-wave|IFSM|1000|A|
|Operating Junction and Storage<br>Temperature Range|TJ,  TSTG|-55 to 175|°C|
|Typical Thermal Resistance Junction to<br>case|RƟJC|0.9|°C/W|



- AEC-Q101 qualified ■ Excellent clamping capability 

- ■ SMTO-263 package, and foot ■ Low incremental surge print is compatible to industrial resistance popular DO-218AB package ■ UL Recognized compound 

- ■ Meet ISO7637-2 5a/5b meeting flammability rating V-0 protection and ISO16750 load ■ Meets MSL level 1, per dump test (refer to APP note J-STD-020, LF maximun peak for details) of 260°C 

- ■ VBR @ TJ= VBR@25°C x (1+αT ■ For surface mounted x (TJ - 25))(αT:Temperature applications to optimize board Coefficient, typical value is space 0.1% ■ Low profile package 

- ■ Glass passivated chip junction ■ High temperature to reflow 

- in modified TO-263 package soldering guaranteed: 

- ■ ESD protection of data lines in 260°C/10sec at terminals accordance with IEC 61000-4■ Matte tin lead–free plated 

- 2, 30kV(Air), 30kV(Contact) 

- ■ EFT protection of data lines in ■ Halogen free and RoHS accordance with IEC 61000compliant 4-4 ■ Pb-free E3 means 2nd level interconnect is Pb-free and 

- ■ Fast response time: typically the terminal finish material is 

- less than 1.0ps from 0 Volts to tin (Sn) (IPC/JEDEC J-STD- 

- BV min 609A.01) 

## **Applications** 

Designed to protect sensitive electronics from: 

- Inductive Load Switching 

- Alternator Load Dump 

## **Functional Diagram** 

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**----- Start of picture text -----**<br>
Cathode  Anode<br>Uni-directional<br>**----- End of picture text -----**<br>


© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: JC.09/24/21 

**1** 

TVS Diodes **Datasheet** 

**SLD8S Series** Surface Mount 

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## **Electrical Characteristics** (TA=25°C unless otherwise noted) 

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**----- Start of picture text -----**<br>
Breakdown  Test   Reverse  Maximum  TJ=150 [O] C Maximum Peak  Maximum  Agency<br>Number (Uni)Part   Voltage VMIN (V) BRMAX @ IT Current  (mA)IT Voltage VStand off (Volts) R Leakage Reverse IR(µA)@ VR  Max. Reverse LeakageIR(µA)@ VR  Pulse Surge Current I(A) pp ClampingVVoltage C  (V)@ IPP  Approval<br>SLD8S14A 15.6 17.2 5.0 14 10 50 301 23.2 X<br>SLD8S15A 16.7 18.5 5.0 15 10 50 286 24.4 X<br>SLD8S16A 17.8 19.7 5.0 16 2.0 50 269 26.0 X<br>SLD8S17A 18.9 20.9 5.0 17 2.0 50 253 27.6 X<br>SLD8S18A 20.0 22.1 5.0 18 2.0 50 240 29.2 X<br>SLD8S20A 22.2 24.5 5.0 20 2.0 50 216 32.4 X<br>SLD8S22A 24.4 26.9 5.0 22 2.0 50 197 35.5 X<br>SLD8S24A 26.7 29.5 5.0 24 2.0 50 180 38.9 X<br>SLD8S26A 28.9 31.9 5.0 26 2.0 50 167 42.1 X<br>SLD8S27A 29.9 33.1 5.0 27 2.0 50 160 43.6 X<br>SLD8S28A 31.1 34.4 5.0 28 2.0 50 154 45.4 X<br>SLD8S30A 33.3 36.8 5.0 30 2.0 50 144 48.4 X<br>SLD8S33A 36.7 40.6 5.0 33 2.0 50 132 53.3 X<br>SLD8S36A 40.0 44.2 5.0 36 2.0 50 121 58.1 X<br>SLD8S40A 44.4 49.1 5.0 40 2.0 50 108 64.5 X<br>SLD8S43A 47.8 52.8 5.0 43 2.0 50 101 69.4 X<br>SLD8S48A 53.3 58.9 5.0 48 2.0 50 89.7 77.4 X<br>SLD8S57A 63.8 69.9 5.0 57 2.0 50 75.5 92.7 X<br>SLD8S60A 66.7 73.7 5.0 60 2.0 50 72.3 96.8<br>SLD8S64A 71.1 78.6 5.0 64 2.0 50 68.0 103.0<br>**----- End of picture text -----**<br>


**Notes:** 

1. VBR 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. 

## **Load Dump Test Wave Form** 

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**----- Start of picture text -----**<br>
Parameter 12V system 24V system<br>US 65v to 87V 123V to 174V<br>Ri 0.5Ω to 4Ω 1Ω to 8Ω<br>td 40 ms to 400 ms 100 ms to 350 ms<br>tr (10-5  )ms<br>0<br>**----- End of picture text -----**<br>


**Note** : LF use td=400ms for 12V system test; td=350ms for 24V system 

© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: JC.09/24/21 

**2** 

TVS Diodes **Datasheet** 

**SLD8S Series** Surface Mount 

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## **I-V Curve Characteristics** 

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**----- Start of picture text -----**<br>
Uni-directional<br>Vc VBR VR V<br>IR VF<br>IT<br>Ipp<br>**----- End of picture text -----**<br>


- **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** 

## **Ratings and Characteristic Curves** (TA=25°C unless otherwise noted) 

**Figure 1 -** Peak Pulse Power Rating Curve 

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**----- Start of picture text -----**<br>
100<br>10<br>1<br>0.1<br>0.01 0.1 1 10 100<br>td-Pulse Width (ms)<br>-Peak Pulse Power(kW)<br>PPM<br>P<br>**----- End of picture text -----**<br>


## **Figure 3 -** Typical Transient Thermal Impedance 

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**----- Start of picture text -----**<br>
100<br>R θJA<br>10<br>1 R θJC<br>0.1<br>0.01<br>0.01 0.1 1 10 100<br>t - Pulse Width (s)<br>)/W<br>°C<br>( e<br>cn<br>a<br>d<br>e<br>p<br>m<br>I l<br>a<br>mre<br>h<br>T<br> t<br>n<br>ei<br>sn<br>Tar<br>**----- End of picture text -----**<br>


## **Figure 2 -** Peak Pulse Power Derating Curve 

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100<br>80<br>60<br>40<br>20<br>0<br>0 25 50 75 100 125 150 175<br>TJ - Initial Junction Temperature (ºC)<br>)PP<br>) or Current (I<br>PP<br>Derating in Percentage %<br>Peak Pulse Power (P<br>**----- End of picture text -----**<br>


## **Figure 4 -** Typical Junction Capacitance 

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100<br>Uni-directional@V= 0V<br>10<br>Uni-directional@ V= VR<br>1<br>10 100<br>VBR - Reverse Breakdown Voltage (V)<br>Cj (nF)<br>**----- End of picture text -----**<br>


© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: JC.09/24/21 

**3** 

TVS Diodes **Datasheet** 

**SLD8S Series** Surface Mount 

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## **Figure 5 -** Typical SOA Chart 

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**----- Start of picture text -----**<br>
0.50 ISO7637 5A 12V Test System<br>0.75<br>SLD8S14A<br>SLD8S15A<br>1.00<br>1.25<br>Td:400ms<br>1.50<br>1.75<br>65 70 75 80 85<br>Vs(volt)<br>1.5 ISO7637 5A 24V Test System<br>2.0<br>SLD8S30A<br>SLD8S36A<br>2.5<br>3.0<br>Td:350ms<br>3.5<br>4.0<br>123 133 143 153 163 173<br>Vs(volt)<br>Ri(ohm)<br>Ri(ohm)<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
0.50 ISO7637 5A 12V Test System<br>0.75<br>SLD8S20A<br>SLD8S24A<br>1.00<br>1.25<br>Td:400ms<br>1.50<br>1.75<br>65 70 75 80 85<br>Vs(volt)<br>Ri(ohm)<br>**----- End of picture text -----**<br>


**Note:** SOA (Safe Operation Area) refer to the area which below the curve line and refer to APP note for details. 

## **Soldering Parameters** 

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Reflow Condition Pb – Free assembly<br>- Temperature Min (Ts(min)) 150°C  t P<br>Pre Heat - Temperature Max (Ts(max)) 200°C T P<br>Average ramp up rate (Liquidus Temp) (T- Time (min to max) (ts) L) to  60 – 180 secs5°C/second max T L Ramp-up t L<br>peak T S(max)<br>TS(max) to TL - Ramp-up Rate 5°C/second max Ramp-down<br>Preheat<br>Reflow - Time ( min to max) (T- Temperature (TL) (Liquidus)S) 217°C 60 – 150 seconds T S(min) t S<br>Peak Temperature (TP) 260 [+0/-5]  °C<br>Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds 25<br>Ramp-down Rate 5°C/second max time to peak temperatur e Time<br>Time 25°C to peak Temperature (TP) 8 minutes Max.<br>Do not exceed 260°C<br>Temperature<br>**----- End of picture text -----**<br>


© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: JC.09/24/21 

**4** 

TVS Diodes **Datasheet** 

**SLD8S Series** Surface Mount 

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## **Physical Specifications** 

|**Terminal Finish**|100% Matte Tin-plated|
|---|---|
|**Body Material**|UL Recognized compound meeting<br>fammability rating V-0|
|**Lead Material**|Copper Alloy|



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## **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** 

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F<br>B<br>G<br>H<br>A<br>E<br>D<br>J<br>U<br>C I<br>TOP VIEW SIDE VIEW<br>AREA:  0 . 11 IN [2] 0.413<br>0.085 (10.50)<br>(2.16)<br>0.331<br>0.276 (8.41) 0.276<br>(7.01) (7.01)<br>0.601<br>(15.27)<br>0.032 0.350<br>(0.81) (8.89)<br>0.091<br>(2.30)<br>M<br>0.320<br>(8.13) 0.118<br>(3.00)<br>BOTTOM VIEW RECOMMEND SOLDERING<br>PAD OUTLINE<br>**----- End of picture text -----**<br>


## **Part Numbering System** 

## **SLD 8 S XX A** 

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5% Voltage Tolerance<br>Voltage<br>SMTO-263 package<br>Power Dissipation<br>Series Code<br>**----- End of picture text -----**<br>


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Inches Millimeters<br>Dimensions<br>Min Max Min Max<br> A    0.568    0.600    14.44   15.24<br> B    0.380    0.420   9.65    10.67<br> C    0.098    0.114   2.50    2.90<br> D    0.169    0.189    4.30   4.80<br> E    0.102    0.118    2.60    3.00<br> F    0.178   0.188    4.52   4.78<br> G    0.045   0.060    1.14   1.52<br> H   0.360    0.370   9.14   9.40<br> I    0.106    0.122    2.69    3.09<br> J    0.069    0.089    1.75   2.25<br> M    0.284   0.300    7.22   7.62<br> U    0    0.010    0    0.25<br>Part Marking System<br>SLD8SXXX<br>YMXXX<br>F<br>Littelfuse Logo Cathode Band Date Code Marking XXX:Lot Code M: Month Code Y: Year Code<br>**----- End of picture text -----**<br>


© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: JC.09/24/21 

**5** 

TVS Diodes **Datasheet** 

**SLD8S Series** Surface Mount 

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## **Packaging** 

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Part Number Component Package  Quantity Packaging Option<br>SLD8SxxA SMTO-263 500 Embossed Carrier<br>**----- End of picture text -----**<br>


**SMTO-263 Embossed Carrier Reel Pack (RP) Specifications** Meets all EIA-481-2 Standards 

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0.63 0.157<br>(16.0) (4.0)<br>0.059 DIA<br>(1.5)<br>0.945 0.827 *<br>(24.0) (21.0)<br>* Cover tape<br>**----- End of picture text -----**<br>


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12.99<br>0.512 (13.0) Arbor (330.0)<br>Hole Dia. Dimensions<br>are in inches<br>(and millimeters).<br>1.01<br>(25.7)<br>Direction of Feed<br>**----- End of picture text -----**<br>


**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 http://www.littelfuse.com/disclaimer-electronics. 

© 2021 Littelfuse, Inc. Specifications are subject to change without notice. Revised: JC.09/24/21 

**6** 



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