# TVS Diode, SM8SF-Q, Bidirectional, 28 V, DFN, 2 Pins

![Product image](https://novapart.co/image/farnell:3015137/)

**URL**: https://novapart.co/products/SM8SF28CA-Q/tvs-diode-sm8sf-q-bidirectional-28-v-dfn-2-pins
**SKU**: SM8SF28CA-Q
**Manufacturer**: BOURNS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €1.0100
**Stock**: 10+
**Lead Time**: 183 days (indicative)

## Description

Product Range:SM8SF-Q Series; TVS Polarity:Bidirectional; Reverse Stand-Off Voltage Vrwm:28V; Clamping Voltage Vc Max:-; Diode Case Style:DFN; No. of Pins:2Pins; Breakdown Voltage Min:31

## Specifications

| Parameter | Value |
|---|---|
| Svhc | Lead (04-Feb-2026) |
| No. Of Pins | 2Pins |
| Tvs Polarity | Bidirectional |
| Product Range | SM8SF-Q |
| Qualification | AEC-Q101 |
| Diode Mounting | Surface Mount |
| Diode Case Style | DFN |
| Clamping Voltage Max | - |
| 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:3015137/)

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## **Features** 

- n Maximum Peak Power Dissipation: 

- 7000 watts 

- n Meets ISO7637-2 / ISO16750-2 Surge 

- specification (varies by test condition) 

- n RoHS compliant* 

n AEC-Q101 compliant** 

## **Applications** 

- n High peak power applications (up to rated limits) 

- n High temperature applications (up to rated limits) 

- n Clamping diode 

- n Load switching and lighting 

## **SM8SF-Q Transient Voltage Suppressor Diode Series** POURNS Ei. 

## ~~**General Information**~~ 

The Model SM8SF-Q Series TVS diodes are designed to provide overvoltage protection for sensitive electronics, meeting ISO7637-2 and ISO16750-2 requirements (varies by test condition). 

The Model SM8SF-Q Series offers a choice of Working Peak Reverse Voltages from 24 V to 36 V and Breakdown Voltage up to 40 V. The SM8SF-Q is available in a compact DFN package of 8.1 mm x 10.5 mm, with a low profile of just 1.3 mm, facilitating layout in today’s compact PCB designs. 

## ~~**Absolute Maximum Ratings (@ TA = 25 °C Unless Otherwise Noted)**~~ 

|**Parameter**|**Symbol**|**Value**|**Unit**|
|---|---|---|---|
|Maximum Peak Pulse Power Dissipation (10/1000 µs)|PPK|7000|W|
|Power Dissipation with Infinite Heatsink (Tc= 25 °C)|PD|5|W|
|Operating Temperature Range|TJ|-55 to +175|°C|
|Storage Temperature Range|TSTG|-55 to +175|°C|



## ~~**Electrical Characteristics (@ TA = 25 °C Unless Otherwise Noted)**~~ 

|**Unidirectional Device**<br>~~yf|~~|**Unidirectional Device**<br>~~yf|~~|**Bidirectional Device**<br>~~|~~<br>~~UE~~|**Bidirectional Device**<br>~~|~~<br>~~UE~~|**Breakdown Voltage**<br>**VBR (Volts)**<br>~~UE~~|**Breakdown Voltage**<br>**VBR (Volts)**<br>~~UE~~|**Breakdown Voltage**<br>**VBR (Volts)**<br>~~UE~~|**Working**<br>**Peak**<br>**Reverse**<br>**Voltage**|**Maximum**<br>**Reverse**<br>**Leakage**<br>**@ VRWM**|**Maximum**<br>**Reverse**<br>**Voltage**<br>**@ IRSM**|**Maximum**<br>**Reverse**<br>**Surge**<br>**Current**|
|---|---|---|---|---|---|---|---|---|---|---|
|**Part No.**<br>~~yf~~<br>~~Re~~|**Marking**<br>~~yf|~~<br>~~rs~~|**Part No.**<br>~~|~~<br>~~rs~~|**Marking**<br>~~UE~~<br>~~ID~~|**Min.**<br>~~UE~~<br>~~ORD~~|**Max.**<br>~~GD~~|**@ IT**<br>**(mA)**<br>~~QO~~|**VRWM (V)**<br>~~(OO~~|**IR (**μ**A)**<br>~~(OO~~|**VRSM (V)**<br>~~(OO~~|**IRSM (A)**|
|SM8SF24A-Q<br>~~yf~~<br>~~Re~~<br>~~ee~~|24A<br>~~yf |~~<br>~~rs~~<br>~~rs~~|SM8SF24CA-Q<br>~~|~~<br>~~rs~~<br>~~re~~|24CA<br>~~UE~~<br>~~ID~~<br>~~Gs~~|26.7<br>~~UE~~<br>~~ORD~~<br>~~Gs~~|29.5<br>~~GD~~<br>~~GO~~|5<br>~~QO~~<br>~~QO~~|24<br>~~(OO~~|10<br>~~(OO~~<br>~~(OO~~|38.9<br>~~(OO~~<br>~~(OO~~|180|
|SM8SF28A-Q<br>~~Re ~~<br>~~ee~~<br>~~ee~~|28A<br> ~~rs~~<br>~~rs~~<br>~~ee~~|SM8SF28CA-Q<br>~~rs ~~<br>~~re~~<br>~~sD~~|28CA<br> ~~ID ~~<br>~~Gs~~<br>~~sD~~|31.1<br> ~~ORD~~<br>~~Gs~~<br>~~Qn~~|34.4<br>~~GD ~~<br>~~GO~~<br>~~GQ~~|5<br> ~~QO~~<br>~~QO~~<br>~~GQ~~|28<br>~~(OO~~|10<br>~~(OO~~<br>~~(OO~~|45.4<br>~~(OO~~<br>~~(OO~~|154|
|SM8SF30A-Q<br>~~ee ~~<br>~~ee~~<br>~~ee~~|30A<br> ~~rs ~~<br>~~ee~~<br>~~es~~|SM8SF30CA-Q<br> ~~re~~<br>~~sD~~<br>~~es~~|30CA<br>~~Gs~~<br>~~sD~~<br>~~ID~~|33.3<br>~~Gs ~~<br>~~Qn~~<br>~~RD~~|36.8<br> ~~GO~~<br>~~GQ~~<br>~~GU~~|5<br>~~QO~~<br>~~GQ~~<br>~~GO~~|30|10<br>~~(OO~~<br>~~(OO~~|48.4<br>~~(OO~~<br>~~(OO~~|145|
|SM8SF33A-Q<br>~~ee~~<br>~~ee~~<br>~~Po~~|33A<br>~~ee~~<br>~~es~~<br>~~Po~~|SM8SF33CA-Q<br>~~sD~~<br>~~es~~|33CA<br>~~sD~~<br>~~ID~~|36.7<br>~~Qn~~<br>~~RD~~|40.6<br>~~GQ~~<br>~~GU~~|5<br>~~GQ~~<br>~~GO~~|33|10<br>~~(OO~~|53.3<br>~~(OO~~|131|
|SM8SF36A-Q<br>~~ee~~<br>~~Po~~|36A<br>~~es~~<br>~~Po~~|SM8SF36CA-Q<br>~~es ~~|36CA<br> ~~ID ~~|40.0<br> ~~RD ~~|44.2<br> ~~GU ~~|5<br> ~~GO~~|36|10<br>~~(OO~~|58.1<br>~~(OO~~|120|



Tel: +886-2 2562-4117 • Email: asiacus@bourns.com **Asia-Pacific: EMEA:** Tel: +36 88 885 877 • Email: eurocus@bourns.com 

**The Americas:** Tel: +1-951 781-5500 • Email: americus@bourns.com 

**www.bourns.com** 

> *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. 

> **”Q” part number suffix for automotive and other applications requiring appropriate AEC-Q101 compliance. Specifications are subject to change without notice. 

**WARNING  Cancer and Reproductive Harm -** www.P65Warnings.ca.gov 

Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **SM8SF-Q Transient Voltage Suppressor Diode Series** 

## ~~**Performance Graphs**~~ 

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Load Dump Power Characteristics<br>**----- End of picture text -----**<br>


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6000<br>5000<br>4000<br>3000<br>2000<br>1000<br>0<br>25 50 75 100 125 150 175<br>Case Temperature, Tc (°C)<br>ISO 7637-2: Pulse 5a, Single Pulse: SM8SF-24A-Q<br>0.0<br>0.5<br>td = 40 ms<br>1.0<br>1.5<br>2.0<br>2.5<br>td = 200 ms<br>3.0<br>3.5<br>td = 400 ms<br>4.0<br>79 81 83 85 87 89 91 93 95 97 99100<br>Us (Volts)<br>Load Dump Power (W)<br>Ri (Ohms)<br>**----- End of picture text -----**<br>


## ~~**ISO 7637-2: Pulse 5a, Single Pulse: SM8SF-24A-Q**~~ 

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Peak Pulse Power Derating Curve<br>**----- End of picture text -----**<br>


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10000<br>5000<br>1000<br>1 10 100<br>Reverse Surge Power (W)<br>**----- End of picture text -----**<br>


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Pulse Width (ms)<br>**----- End of picture text -----**<br>


## ~~**ISO 7637-2: Pulse 5a, Single Pulse: SM8SF-33A-Q**~~ 

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0<br>1<br>2<br>3<br>td = 100 ms<br>4<br>5<br>6<br>td = 200 ms<br>7<br>8<br>150 155 160 165 170 175 180 185 190 195 200<br>Us (Volts)<br>Ri (Ohms)<br>**----- End of picture text -----**<br>


## ~~**Power Dissipation**~~ 

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8<br>6<br>4<br>2<br>0<br>25 50 75 100 125 150 175<br>Case Temperature, Tc (°C)<br>Power Dissipation (W)<br>**----- End of picture text -----**<br>


Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/ legal/disclaimer.pdf. 

## **SM8SF-Q Transient Voltage Suppressor Diode Series** 

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Product Dimensions<br>SM8SFxxA-Q SM8SFxxCA-Q<br>TOP VIEW TOP VIEW<br>B B<br>Dimension Value<br>8.1 ± 0.15<br>A<br>(0.319 ± 0.006)<br>10.5 ± 0.20<br>B<br>(0.413 ± 0.008)<br>A C A C C 7.0 ± 0.15<br>(0.276 ± 0.006)<br>1.5 ± 0.15<br>D<br>(0.059 ± 0.006)<br>1.3 ± 0.20<br>E<br>(0.051 ± 0.008)<br>7.5 ± 0.15<br>F<br>SIDE VIEW SIDE VIEW (0.295 ± 0.006)<br>D D D<br>E E<br>MM<br>DIMENSIONS:<br>(INCHES)<br>F<br>BOTTOM VIEW BOTTOM VIEW<br>B B<br>A C A C<br>**----- End of picture text -----**<br>


## ~~**Recommended Footprint**~~ 

|G|**SM8SFxxA**|**SM8SFxxA**|**SM8SFxxA**|**SM8SFxxA**|**-Q**|**-Q**|H|I|G|**SM8SFxxCA-Q**<br>H|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Specifications are subject to change without notice. 

Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **SM8SF-Q Transient Voltage Suppressor Diode Series** 

## ~~**Physical Specifcations**~~ 

Case ...........................................Molded plastic per UL Class 94V-0 Polarity....................... Cathode band indicates unidirectional device No cathode band indicates bidirectional device 

## ~~**How to Order**~~ 

## **SM8SF   33   CA - Q** 

Package SM8SF = 0.41 inch x 0.32 inch size Working Peak Reverse Voltage 33 = 33 VRWM (Volts) Suffix A = 5 % Tolerance Unidirectional Device CA = 5 % Tolerance Bidirectional Device AEC-Q101 Suffix Q = AEC-Q101 Compliant 

## ~~**Environmental Specifcations**~~ 

Moisture Sensitivity Level ................................................................1 ESD Classification (HBM)............................................................. 3B 

## ~~**Typical Part Marking**~~ 

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SM8SFxxA-Q<br>SERIES:<br>SM8S = SM8SF<br>A = 5 % TOLERANCE<br>      UNIDIRECTIONAL DEVICE<br>SM8S<br>33A<br>WORKING  YWW<br>PEAK<br>REVERSE<br>VOLTAGE<br>33 = 33 V DATE CODE:<br>CATHODE BAND     Y = LAST DIGIT OF YEAR<br>(UNIDIRECTIONAL WW = WEEK NUMBER<br>DEVICES ONLY)<br>**----- End of picture text -----**<br>


## **SM8SFxxCA-Q** 

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**----- Start of picture text -----**<br>
SERIES:<br>SM8S = SM8SF<br>CA = 5 % TOLERANCE<br>        BIDIRECTIONAL DEVICE<br>SM8S<br>33CA<br>WORKING  YWW<br>PEAK<br>REVERSE<br>VOLTAGE<br>33 = 33 V DATE CODE:<br>    Y = LAST DIGIT OF YEAR<br>WW = WEEK NUMBER<br>**----- End of picture text -----**<br>


Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **CDDFN5-0504N - TVS/Steering Diode ArraySM8SF-Q Transient Voltage Suppressor Diode Series** 

## ~~**Packaging Information**~~ 

The product will be dispensed in tape and reel format (see diagram below). 

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**----- Start of picture text -----**<br>
P0<br>P1 E T<br>d Index Hole<br>AF e s _ ,<br>of S OOT F<br>B Or e ris @-\)}—- W / D2<br>i | i fy D1 D |<br>foeeee nr P : A C jk7 |\ Gw)ey| be<br>Trailer Device Leader<br>....... ....... ....... .......<br>End ....... ....... ....... ....... Start W1<br>MM<br>DIMENSIONS:<br>(INCHES)<br>10 pitches (min.) 10 pitches (min.)<br>— —<br>Devices are packed in accordance with EIA 481<br>Direction of Feed standard specifications shown here.<br>Item Symbol SM8SF Series<br>ee<br>8.35 ± 0.10<br>Carrier Width A<br>po (0.329 ± 0.004)<br>Part Pick-up<br>10.75 ± 0.10<br>Carrier Length B (0.423 ± 0.004) Height Part<br>ee Carrier Depth C eee (0.065 ± 0.0041.65 ± 0.10 ) Thickness 0.3 mm<br>ee Sprocket Hole ee d eee (0.061 ± 0.0021.55 ± 0.05 ) | above PCB<br>ee ee  178 ± 1.0 ee e s |<br>Reel Outside Diameter D<br>(7.008 ± 0.039)<br> 60 ± 1.0<br>Reel Inner Diameter D1 e (2.362 ± 0.039) PCB<br>e e ee ee o e<br>ee  13.5 ± 0.50<br>ee Feed Hole Diameter D2 (0.531 ± 0.02)<br>ee ee  1.75 ± 0.10 Recommended pick-up height: The bottom of the device<br>ee Sprocket Hole Position ee E ee (0.069 ± 0.004 5.50 ± 0.10 ) should be 0.3 mm above the PCB.<br>Punch Hole Position F<br>eeee ( 12.00 ± 0.100.217 ± 0.004 e ) e<br>Punch Hole Pitch P<br>eeee ee (0.472 ± 0.004 4.00 ± 0.10 )<br>ee Sprocket Hole Pitch P0 (0.157 ± 0.004)<br> 2.00 ± 0.10<br>Embossment Center P1 (0.079 ± 0.004)<br>rr ee ee 0.40<br>Overall Tape Thickness T (0.016) [MAX.]<br>ee ee 16.00 ± 0.30<br>ee Tape Width W (0.630 ± 0.012)<br> 18.1 ± 1.2<br>Reel Width W1 (0.713 ± 0.047)<br>eea Quantity per Reel -- ee  750<br>**----- End of picture text -----**<br>


Recommended pick-up height: The bottom of the device should be 0.3 mm above the PCB. 

02/19 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **Legal Disclaimer Notice** 

This legal disclaimer applies to purchasers and users of Bourns[®] products manufactured by or on behalf of Bourns, Inc. and 

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The characteristics and parameters of a Bourns[®] product set forth in its data sheet are based on laboratory conditions, and statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical requirements in generic applications.  The characteristics and parameters of a Bourns[®] product in a user application may 

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- ® 

Bourns[®] 

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the user’s sole risk. 

and the user for which such Bourns[®] custom and the user regarding the use and level of also apply to such Bourns[®] custom products. 

® custom products shall be negotiated on a case-by-case basis by Bourns are specially designed. Absent a written agreement between Bourns testing, the above provisions applicable to Bourns ® standard products shall 

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