# TVS Diode, Transil SMA6TY Series, Unidirectional, 28.2 V, 45.7 V, DO-214AC (SMA), 2 Pins

![Product image](https://novapart.co/image/farnell:4035981/)

**URL**: https://novapart.co/products/SMA6T33AY/tvs-diode-transil-sma6ty-series-unidirectional-282
**SKU**: SMA6T33AY
**Manufacturer**: STMICROELECTRONICS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €0.3510
**Stock**: 1000+
**Lead Time**: 127 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Tvs Polarity | Unidirectional |
| Product Range | Transil SMA6TY Series |
| Qualification | AEC-Q101 |
| Diode Mounting | Surface Mount |
| Diode Case Style | DO-214AC (SMA) |
| Clamping Voltage Max | 45.7V |
| Reverse Standoff Voltage | 28.2V |
| Maximum Breakdown Voltage | 34.7V |
| Minimum Breakdown Voltage | 31.4V |
| Operating Temperature Max | 150°C |
| Peak Pulse Power Dissipation | 600W |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4035981/)

## **SMA6TY** 

## Automotive 600 W Transil™ in SMA package 

Datasheet - production data 

- ISO 7637-2[a] 

   - Pulse 1: VS = -100 V 

   - Pulse 2a: VS = +50 V 

**==> picture [149 x 111] intentionally omitted <==**

**----- Start of picture text -----**<br>
A A<br>K eS K @<br>Unidirectional Bidirectional<br>SMA<br>(JEDEC DO-214AA)<br>**----- End of picture text -----**<br>


## **Features** 

- AEC-Q101 qualified 

- Peak pulse power: 

   - 600 W (10/1000 μs) 

- Pulse 3a: VS = -150 V 

- Pulse3b: VS = +100 V 

## **Description** 

The SMA6TY Transil series has been designed to protect sensitive automotive circuits against surges defined in ISO 7637-2 and against electrostatic discharges according to ISO 10605. 

The planar technology makes this device compatible with high-end circuits where low leakage current and high junction temperature are required to provide reliability and stability over time. SMA6TY are packaged in SMA (SMA footprint in accordance with IPC 7531 standard). 

Transil™ is a trademark of STMicroelectronics. 

   - 4 kW (8/20 μs) 

- Stand-off voltage range: from 5 V to 70 V 

- Unidirectional and bidirectional types 

- Low leakage current: 

   - 0.2 μA at 25 °C 

   - 1 μA at 85 °C 

- Operating Tj max: 150 °C 

- JEDEC registered package outline 

- Resin meets UL 94, V0 

## **Complies with the following standards** 

- ISO 10605, C = 150 pF, R = 330 Ω:  30 kV (air discharge) 

   - 30 kV (contact discharge) 

- ISO 10605, C = 330 pF, R = 330 Ω: 

   - 30 kV (air discharge) 

   - 30 kV (contact discharge) 

> a Not applicable to parts with stand-off voltage lower than the average battery voltage (13.5 V). 

January 2018 

DocID17869 Rev 4 

1/13 

This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**SMA6TY** 

## **1** 

## **Characteristics** 

**Table 1: Absolute maximum ratings (Tamb = 25 °C)** 

|**Symbol**|**Parameter**||**Value**|**Unit**|
|---|---|---|---|---|
|VPP|Peak pulse voltage|ISO10605 (C = 330 pF, R = 330 Ω):<br>Contact discharge<br>Air discharge<br>ISO10605 / IEC 61000-4-2<br>(C = 150 pF, R = 330 Ω)<br>Contact discharge<br>Air discharge|30<br>30<br>30<br>30|kV|
|PPP|Peakpulsepower dissipation|10/1000µs, Tjinitial = Tamb|600|W|
|Tj|Operating junction temperature range||-40 to +150|°C|
|TSTG|Storage temperature range||-65 to +150|°C|
|TL|Maximum lead temperature for solderingduring10 s||260|°C|



**Figure 1: Electrical characteristics - parameter definitions** 

## **Figure 2: Pulse definition for electrical characteristics** 

2/13 

DocID17869 Rev 4 

**SMA6TY Characteristics** 

|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**|**A6TY**<br>**Characteristics**||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**Table 2: Electrical characteristicsparameter values(Tamb = 25 °C, unless otherwise specified)**|||||||||||||||
|**Order code**|**IRM max at VRM**||||**VBR at IR****_(1)_**|||**10 / 1000 µs**||||**8 / 20µs**||**αT****_(2)_**|
|||||||||**VCL**|**IPP**|**RD**|**VCL**|**IPP**|**RD**||
||**25**<br>**°C**|**85**<br>**°C**||**Min.**|**Typ.**|**Max.**||**Max.**||**Max.**|**Max.**|||**Max.**|
||**µA**||**V**||||**mA**|**V****_(3)_**|**A****_(4)_**|**Ω**|**V**|**A**|**Ω**|**10-**<br>**4/°C**|
||||||**V**||||||||||
||||||||||||||||
|SMA6T6V7AY/CAY|20|50|5.00|6.40|6.40|7.1|10|9.1|68.0|0.029|14.4|275|0.027|5.7|
|SMA6T7V6AY/CAY|20|50|6.50|7.20|7.60|8.0|10|10.2|56.0|0.04|15.2|266|0.027|6.1|
|SMA6T10AY/CAY|20|50|8.60|9.50|10.0|10.5|1|14.5|41.0|0.098|18.6|215|0.038|7.3|
|SMA6T12AY/CAY|0.2|1|10.2|11.4|12.0|12.6|1|16.7|36.0|0.114|21.7|184|0.049|7.8|
|SMA6T14AY/CAY|0.2|1|12.0|13.3|14.0|14.7|1|18.8|31.0|0.133|23.5|157|0.056|8.3|
|SMA6T15AY/CAY|0.2|1|12.8|14.3|15.0|15.8|1|21.2|28.0|0.193|27.2|147|0.078|8.4|
|SMA6T18AY/CAY|0.2|1|15.3|17.1|18.0|18.9|1|25.2|24.0|0.263|32.3|123|0.111|8.8|
|SMA6T22AY/CAY|0.2|1|18.8|20.9|22.0|23.1|1|30.6|20.0|0.375|39.3|102|0.159|9.2|
|SMA6T24AY/CAY|0.2|1|20.5|22.8|24.0|25.2|1|33.2|18.0|0.444|42.8|93.0|0.189|9.4|
|SMA6T28AY/CAY|0.2|1|24|26.7|28.1|29.5|1|37.8|16.0|0.516|44.3|80.0|0.184|9.6|
|SMA6T30AY/CAY|0.2|1|25.6|28.5|30.0|31.5|1|41.5|14.5|0.690|53.5|75.0|0.293|9.7|
|SMA6T33AY/CAY|0.2|1|28.2|31.4|33.0|34.7|1|45.7|13.1|0.840|59.0|68.0|0.357|9.8|
|SMA6T39AY/CAY|0.2|1|33.3|37.1|39.0|41.0|1|53.9|11.1|1.16|69.7|57.0|0.504|10.0|
|SMA6T47AY/CAY|0.2|1|40.0|44.4|46.7|49.1|1|62.8|9.70|1.42|73.6|48.0|0.511|10.1|
|SMA6T56AY/CAY|0.2|1|47.6|53.2|56.0|58.8|1|76.6|7.80|2.28|100|40|1.030|10.0|
|SMA6T68AY/CAY|0.2|1|58.1|64.6|68.0|71.4|1|92.0|6.50|3.17|121|33.0|1.50|10.4|
|SMA6T82AY/CAY|0.2|1|70.0|77.8|81.9|86.0|1|110|5.50|4.38|120|27|1.030|10.5|



## **Notes:** 

(1)Pulse test: tp < 50 ms 

(2)To calculate VBR or VCL versus junction temperature, use the following formulas: 

VBR at TJ = VBR at 25 °C x (1 + αT x (TJ - 25)) 

VCL at TJ = VCL at 25 °C x (1 + αT x (TJ-25)) 

(3)To calculate maximum clamping voltage at other surge level, use the following formula: 

VCLmax = VBR max + RD x IPPappli where IPPappli is the surge current in the application 

(4)Surge capability given for both directions for unidirectional and bidirectional types. 

DocID17869 Rev 4 

3/13 

**SMA6TY** 

## **Characteristics** 

## **1.1 Characteristics (curves)** 

**==> picture [453 x 177] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 3: Relative variation of peak power versus  Figure 4: Peak pulse power versus exponential<br>initial junction temperature  pulse duration<br>% PPP(kW)<br>110 10.0<br>100 10/1000 µs Tj initial = 25 °C<br>90<br>80<br>70<br>60<br>1.0<br>50<br>40<br>30<br>20<br>10 tP(ms)<br>0 T (°C)j 0.1<br>0 25 50 75 100 125 150 175 0.01 0.10 1.00 10.00<br>**----- End of picture text -----**<br>


**Figure 5: Clamping voltage versus peak pulse current exponential waveform (maximum values)** 

## IPP(A) 

**==> picture [438 x 275] intentionally omitted <==**

**----- Start of picture text -----**<br>
1000.0<br>Tj initial=25 °C<br>100.0<br>8/20 µs<br>10.0<br>10/1000 µs<br>1.0<br>VCL(V)<br>0.1<br>1 10 100 1000<br>SMA6T6V7AY/CAY SMA6T30AY/CAY SMA6T82AY/CAY<br>**----- End of picture text -----**<br>


4/13 

DocID17869 Rev 4 

**SMA6TY** 

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**----- Start of picture text -----**<br>
Characteristics<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
Figure 6: ISO 7637-2 pulse 1 response (VS = -100 V)<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
Figure 7: ISO 7637-2 pulse 2a response (VS = 50 V)<br>**----- End of picture text -----**<br>


DocID17869 Rev 4 

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**SMA6TY** 

## **Characteristics** 

**==> picture [227 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 8: ISO 7637-2 pulse 3a response (VS = -150 V)<br>**----- End of picture text -----**<br>


**Figure 9: ISO 7637-2 pulse 3b response (VS = 100 V)** 

ISO7637-2 pulses responses are not applicable for products with a stand-off voltage lower than the average battery voltage (13.5 V). 

6/13 

DocID17869 Rev 4 

**SMA6TY** 

**Characteristics** 

**==> picture [462 x 382] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 10: Junction capacitance versus reverse  Figure 11: Junction capacitance versus reverse<br>applied voltage for unidirectional types  applied voltage for bidirectional types<br> (typical values)  (typical values)<br>C(pF) C(pF)<br>10000 10000<br>F=1 MHz F=1 MHz<br>VOSCT=30 mVj=25 °C RMS VOSCT=30 mVj=25 °C RMS<br>SMA6T6V7AY<br>1000 1000 SMA6T6V7CAY<br>SMA6T30AY<br>100 100 SMA6T30CAY<br>SMA6T82AY<br>SMA6T82CAY<br>VR(V) 10 VR(V)<br>10<br>1 10 100 1000<br>1 10 100 1000<br>Figure 12: Relative variation of thermal impedance,  Figure 13: Thermal resistance junction to ambient<br>junction to ambient, versus pulse duration  versus copper surface under each lead<br>1.00 Zth (j-a)/Rth (j-a) 130 Rth(j-a)(°C/W)<br>Printed circuit board FR4,copper surface = 1 cm [2] 120 printed circuit board FR4,<br>coppe r thickness = 35 µm<br>110<br>100<br>90<br>0.10<br>80<br>70<br>60<br>tp s 50 SCu(cm²)<br>0.01 40<br>1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
Figure 14: Leakage current versus junction  Figure 15: Peak forward voltage drop versus peak<br>temperature (typical values)  forward current (typical values)<br>1.E+04 IR(nA) 1.E+01 IFM(A)<br>VR=VRM<br>1.E+03<br>VRM ≤10 V Tj=125 °C<br>1.E+00<br>1.E+02 Tj=25 °C<br>1.E-01<br>1.E+01 VRM > 10 V<br>T (°C)j VFM(V)<br>1.E+00<br>1.E-02<br>25 50 75 100 125 150 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4<br>**----- End of picture text -----**<br>


DocID17869 Rev 4 

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**SMA6TY** 

**Package** information 

## **2 Package information** 

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK[®] packages, depending on their level of environmental compliance. ECOPACK[®] specifications, grade definitions and product status are available at: _**www.st.com**_ . ECOPACK[®] is an ST trademark. 

- Case: JEDEC DO214-AA molded plastic over planar junction 

- Terminals: solder plated, solderable per MIL-STD-750, method 2026 

- Polarity: for unidirectional types the band indicates cathode 

- Flammability: epoxy is rated UL94V-0 

- RoHS package 

## **2.1 SMA package information** 

## **Figure 16: SMA package outline** 

~~>~~ 8/13 DocID17869 Rev 4 ~~7 2~~ 

**SMA6TY** 

**Package** information 

**Table 3: SMA package mechanical data** 

|**Ref.**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|
||**Millimeters**||**Inches**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A1|1.90|2.45|0.0748|0.0964|
|A2|0.05|0.20|0.0020|0.0079|
|b|1.25|1.65|0.0492|0.0649|
|c|0.15|0.40|0.0059|0.0157|
|D|2.25|2.90|0.0885|0.1141|
|E|4.80|5.35|0.1889|0.2106|
|E1|3.95|4.60|0.1555|0.1811|
|L|0.75|1.50|0.0295|0.0591|



**==> picture [446 x 182] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 17: SMA recommended footprint  Figure 18: Marking layout<br>1.40 2.63 1.40<br>(0.066) (0.104) (0.066)<br>Cathode bar (unidirectional devices only)<br>e3 e3: ECOPACK compliance<br>XXX: Marking<br>1.64 x x x Z: Manufacturing locationY: Year<br>WW: Week<br>(0.065)<br>z y w w<br>5.43<br>(0.214)<br>millimeters Note: Marking layout can vary according to assembly location.<br>(inches)<br>**----- End of picture text -----**<br>


DocID17869 Rev 4 

9/13 

**Ordering** information 

**SMA6TY** 

## **3 Ordering information** 

**Figure 19: Ordering information scheme** 

**==> picture [406 x 286] intentionally omitted <==**

**----- Start of picture text -----**<br>
SM A6 T XX CA Y<br>Surface mount<br>Peak pulse power<br>A6 = 600 W Transil in SMA<br>Breakdown voltage<br>30 = 30 V<br>Types<br>CA = Bidirectional<br>A = Unidirectional<br>Automotive grade<br>**----- End of picture text -----**<br>


|**Table 4: Ordering information**|**Table 4: Ordering information**|**Table 4: Ordering information**|**Table 4: Ordering information**|||
|---|---|---|---|---|---|
|**Order code**|**Marking**|**Package**|**Weight**|**Base qty.**|**Delivery**<br>**mode**|
|SM6TxxxAy/CAy_(1)_|See_Table 4: "Ordering_<br>_information"_.|SMA|0.11 g|2500|Tape and reel|



## **Notes:** 

> (1)Where xxx is nominal value of VBR and A or CA indicates unidirectional or bidirectional version. See _Table 2: "Electrical characteristics parameter values (Tamb = 25 °C, unless otherwise specified)"_ for list of available devices and their order codes 

10/13 

DocID17869 Rev 4 

**Ordering** information 

**SMA6TY** 

**Table 5: Marking** 

|**Order code**|**Marking**|**Order code**|**Marking**|
|---|---|---|---|
|SMA6T6V7AY|6UAY|SMA6T6V7CAY|6BAY|
|SMA6T7V6AY|6UCY|SMA6T7V6CAY|6BCY|
|SMA6T10AY|6UDY|SMA6T10CAY|6BDY|
|SMA6T12AY|6UEY|SMA6T12CAY|6BEY|
|SMA6T14AY|6UFY|SMA6T14CAY|6BFY|
|SMA6T15AY|6UGY|SMA6T15CAY|6BGY|
|SMA6T18AY|6UHY|SMA6T18CAY|6BHY|
|SMA6T22AY|6UJY|SMA6T22CAY|6BJY|
|SMA6T24AY|6UKY|SMA6T24CAY|6BKY|
|SMA6T28AY|6UMY|SMA6T28CAY|6BMY|
|SMA6T30AY|6UNY|SMA6T30CAY|6BNY|
|SMA6T33AY|6UOY|SMA6T33CAY|6BOY|
|SMA6T39AY|6UQY|SMA6T39CAY|6BQY|
|SMA6T47AY|6URY|SMA6T47CAY|6BRY|
|SMA6T56AY|6USY|SMA6T56CAY|6BSY|
|SMA6T68AY|6UTY|SMA6T68CAY|6BTY|
|SMA6T82AY|6UUY|SMA6T82CAY|6BUY|



DocID17869 Rev 4 

11/13 

**SMA6TY** 

**Revision** history 

## **4 Revision history** 

**Table 6: Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|15-Sep-2010|1|Initial release.|
|18-Oct-2011|2|Deleted old Table 2. Thermal parameter. Updated Table 2 and added order<br>codes in Table 4. Updated Figure 5, Figure 10 and Figure 11.|
|27-Mar-2012|3|Added footnote onpage 1.|
|25-Jan-2018|4|Updated_Table 2: "Electrical characteristics parameter values (Tamb = 25 °C,_<br>_unless otherwise specified)"_.|



12/13 

DocID17869 Rev 4 

**SMA6TY** 

## **IMPORTANT NOTICE – PLEASE READ CAREFULLY** 

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. 

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. 

No license, express or implied, to any intellectual property right is granted by ST herein. 

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. 

ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. 

Information in this document supersedes and replaces information previously supplied in any prior versions of this document. 

- © 2018 STMicroelectronics – All rights reserved 

DocID17869 Rev 4 

13/13 



## Links

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- [Supplier page](https://es.farnell.com/stmicroelectronics/sma6t33ay/tvs-diode-unidir-45-7v-600w-sma/dp/4035981)
---

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