# Schottky Rectifier, 40 V, 3 A, Single, TO-252 (DPAK), 3 Pins, 570 mV

![Product image](https://novapart.co/image/farnell:4035973/)

**URL**: https://novapart.co/products/STPS340B-TR/schottky-rectifier-40-v-3-a-single-to-252-dpak
**SKU**: STPS340B-TR
**Manufacturer**: STMICROELECTRONICS
**Category**: Semiconductors - Discretes || Diodes & Rectifiers || Schottky Diodes || Schottky Rectifier Diodes
**Price**: €0.3070
**Stock**: 1000+
**Lead Time**: 274 days (indicative)

## Description

Available until stocks are exhausted

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (17-Dec-2015) |
| No. Of Pins | 3Pins |
| Product Range | - |
| Qualification | - |
| Diode Mounting | SMD |
| Diode Case Style | TO-252 (DPAK) |
| Diode Configuration | Single |
| Forward Voltage Max | 570mV |
| Forward Surge Current | 75A |
| Average Forward Current | 3A |
| Operating Temperature Max | 150°C |
| Repetitive Peak Reverse Voltage | 40V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4035973/)

**STPS340** 

Datasheet 

40 V, 3 A power Schottky rectifier 

## **Features** 

- Very small conduction losses 

- Negligible switching losses 

- Low forward voltage drop 

- Low thermal resistance 

- Extremely fast switching 

- Surface mount package 

- Avalanche rated 

- ECOPACK2 component 

## **Applications** 

- Telecom power supply 

- Set-top box power supply 

- TV power supply 

- Battery charger 

## **Description** 

Single chip Schottky rectifier suited for switch mode power supplies and high frequency DC to DC converters. 

**Product status** STPS340 

Packaged in SMA Flat Notch, SMB, SMB Flat, SMC and DPAK, the STPS340 is ideal for surface mounting and used in low voltage, high frequency inverters, free wheeling and polarity protection applications. 

|**Product summary**|**Product summary**|
|---|---|
|**Symbol**|**Value**|
|**IF(AV)**|3 A|
|**VRRM**|40 V|
|**T j(max.)**|150 °C|
|**VF(typ.)**|0.52 V|



**DS0792** - **Rev 13** - **October 2019** For further information contact your local STMicroelectronics sales office. 

www.st.com 

**STPS340 Characteristics** 

**1 Characteristics** 

**Table 1. Absolute ratings (limiting values at 25 °C, unless otherwise specified)** 

|**Symbol**|**Parameter**|||**Value**|**Unit**|
|---|---|---|---|---|---|
|VRRM|Repetitive peak reverse voltage|||40|V|
|IF(RMS)|Forward rms current||DPAK|6|A|
|IF(AV)|Average forward current, δ = 0.5, square wave|SMA Flat Notch|TL= 105 °C|3|A|
|||SMB|TL= 95 °C|||
|||SMB Flat|TL= 115 °C|||
|||SMC|TL= 105 °C|||
|||DPAK|TC= 135°C|||
|IFSM|Surge non repetitive forward current|SMA Flat Notch|tp= 10 ms sinusoidal|105|A|
|||All others||75|A|
|PARM|Repetitive peak avalanche power||tp= 10 µs, Tj= 125 °C|90|W|
|Tstg|Storage temperature range|||-65 to +150|°C|
|Tj|Maximum operating junction temperature(1)|||+150|°C|



_1. (dPtot/dTj) < (1/Rth(j-a)) condition to avoid thermal runaway for a diode on its own heatsink._ 

**Table 2. Thermal resistance parameter** 

|**Symbol**|**Parameter**||**Max. value**|**Unit**|
|---|---|---|---|---|
|Rth(j-l)|Junction to lead|SMA Flat Notch<br>SMB<br>SMB Flat<br>SMC|20|°C/W|
||||25||
||||15||
||||20||
|Rth(j-c)|Junction to case|DPAK|5.5||



For more information, please refer to the following application note : 

- AN5088 : Rectifiers thermal management, handling and mounting recommendations 

**Table 3. Static electrical characteristics** 

|**Symbol**|**Parameter**|**Test conditions**|**Test conditions**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|---|---|
|IR(1)|Reverse leakage current|Tj= 25 °C|VR= VRRM|-||20|µA|
|||Tj= 125 °C||-|2|10|mA|
|VF(1)|Forward voltage drop|Tj= 25 °C|IF= 3 A|-||0.63|V|
|||Tj= 125 °C||-|0.52|0.57||
|||Tj= 25 °C|IF= 6 A|-||0.84||
|||Tj= 125 °C||-|0.63|0.72||



_1. Pulse test: tp = 380 µs, δ < 2%_ 

**DS0792** - **Rev 13** 

**page 2/19** 

**STPS340 Characteristics** 

To evaluate the conduction losses, use the following equation: P = 0.42 x IF(AV) + 0.050 x IF[2] (RMS) 

For more information, please refer to the following application notes related to the power losses : 

- AN604: Calculation of conduction losses in a power rectifier 

- AN4021: Calculation of reverse losses on a power diode 

**DS0792** - **Rev 13** 

**page 3/19** 

**STPS340 Characteristics (curves)** 

## **1.1 Characteristics (curves)** 

**==> picture [513 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 1. Average forward power dissipation versus Figure 2. Average forward current versus ambient<br>average forward current temperature (δ = 0.5) (SMB, SMC, DPAK)<br>2.5 PF(AV)(W) 3.5 [I] F(AV)( A) DPAK<br>δ = 0.05 δ = 0.1 δ = 0.2 δ = 0.5 3.0 R th(j-a) =  R th(j-c)<br>2.0 SMB<br>δ = 1 2.5 R th(j-a) =  R th(j-l)<br>1.5<br>2.0 SMC<br>Rth(j-a) = Rth(j-l)<br>1.0 1.5<br>0.5 T 1.0 T R th(j-a) =  65 °C/W<br>0.0 δ =tp/T tp 0.5<br>0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0.0 δ = t P /T t P T amb (°C)<br>IF(AV)(A) 0 25 50 75 100 125 150<br>**----- End of picture text -----**<br>


**==> picture [513 x 207] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 3. Average forward current versus ambient Figure 4. Normalized avalanche power derating versus<br>temperature (δ = 0.5, SMB Flat) pulse duration (Tj = 125 °C)<br>PARM(tp)<br>IF(AV)(A) PARM(10 µs)<br>3.5 1<br>R th(j-a) =  R th(j-l)<br>3.0<br>2.5<br>0.1<br>2.0<br>1.5<br>1.0 0.01<br>T<br>0.5<br>0.0 δ = tP/T tP t p(µs)<br>0.001<br>0 25 50 75 100 125 150<br>Tamb(°C) 1 10 100 1000<br>**----- End of picture text -----**<br>


**Figure 5. Relative variation of thermal impedance junction Figure 6. Relative variation of thermal impedance junction to ambient versus pulse duration (SMB) to lead versus pulse duration (SMB flat)** 

**==> picture [470 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
Zth(j-a)/Rth(j-a) Zth(j-l) / Rth(j-l)<br>1.0 1.0<br>0.9 0.9<br>0.8 0.8<br>0.7 0.7<br>0.6 0.6<br>0.5 0.5<br>0.4 0.4<br>0.3 0.3<br>0.2 0.2<br>Single pulse Single pulse<br>0.1 0.1<br>0.0 0.0<br>1.E-02 1.E-01 1.E+00 tp(s) 1.E+01 1.E+02 1.E+03 1.E-04 1.E-03 1.E-02 tp(s) 1.E-01 1.E+00 1.E+01<br>**----- End of picture text -----**<br>


**DS0792** - **Rev 13** 

**page 4/19** 

**STPS340 Characteristics (curves)** 

**==> picture [513 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 7. Relative variation of thermal impedance junction Figure 8. Relative variation of thermal impedance junction<br>to ambient versus pulse duration (SMC) to case versus pulse duration (DPAK)<br>Zth(j-a)/ Rth(j-a) Zth(j-c)/Rth(j-c)<br>1.0 1.0<br>0.9 0.9<br>0.8 0.8<br>0.7 0.7<br>0.6 0.6<br>0.5 0.5<br>0.4 0.4<br>0.3 0.3 Single pulse<br>0.2 0.2<br>Single pulse<br>0.1 0.1<br>0.0 0.0<br>1.E-02 1.E-01 1.E+00 tp(s) 1.E+01 1.E+02 1.E+03 1.E-03 1.E-02 tp(s) 1.E-01 1.E+00<br>**----- End of picture text -----**<br>


**==> picture [513 x 206] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 9. Reverse leakage current versus reverse voltage Figure 10. Junction capacitance versus reverse voltage<br>applied (typical values) applied (typical values)<br>IR(mA) C(pF)<br>1.E+01 Tj=150°C 1000 F=1MHz<br>VOSC= 30mVR MS<br>T= 25°Cj<br>1.E+00 Tj=125°C<br>Tj=100°C<br>1.E-01 Tj=75°C<br>100<br>1.E-02<br>T j =25°C<br>1.E-03<br>10<br>1.E-04<br>1 1 0 100<br>0 5 10 15 20VR(V)25 30 35 40 VR(V)<br>**----- End of picture text -----**<br>


**==> picture [513 x 205] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 12. Thermal resistance junction to ambient versus<br>Figure 11. Forward voltage drop versus forward current copper surface under each lead (SMA Flat Notch)<br>10.00IF(A) Rth(j-a) (°C/W)<br>200<br>Epoxy printed circuit board FR4,copper thickness: 35 µm<br>SMA Flat Notch<br>(Maximum values)Tj=125°C<br>1.00 150<br>(TypicalTj=125°Cvalues) 100<br>0.10 (Maximum values)Tj=25°C<br>50<br>0.01 S(Cu)(cm²)<br>0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0<br>VF(V) 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>


**DS0792** - **Rev 13** 

**page 5/19** 

**STPS340 Characteristics (curves)** 

**Figure 13. Thermal resistance junction to ambient versus Figure 14. Thermal resistance junction to ambient versus copper surface under each lead (SMB) copper surface under each lead (SMB flat)** 

**==> picture [473 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
Rth(j-a) (°C/W) Rth(j-a) (°C/W)<br>200 200<br>Epoxy p rinted circuit board FR4, copper t hickness: 35 µm SMB Epoxy printed circuit board FR4, eCu = 35 µm SMB flat<br>150 150<br>100 100<br>50 50<br>S (Cu) (cm²) SCu(cm²)<br>0 0<br>0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 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>


**==> picture [513 x 205] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 16. Thermal resistance junction to ambient versus<br>Figure 15. Thermal resistance junction to ambient versus<br>copper surface under tab (DPAK)<br>copper surface under each lead (SMC)<br>160 Rth(j-a) (°C/W) 100 Rth(j-a) (°C/W)<br>Epoxy p rinted circuit board FR4, copper t hickness: 35 µm DPAK<br>140 SMC 90 Epoxy printed circuit board, copper thickness: 35 µm<br>80<br>120<br>70<br>100<br>60<br>80 50<br>60 40<br>30<br>40<br>20<br>20 10<br>S Cu (cm²) S Cu (cm²)<br>0 0<br>0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 5 10 15 20 25 30 35 40<br>**----- End of picture text -----**<br>


**DS0792** - **Rev 13** 

**page 6/19** 

**STPS340 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. 

## **2.1 SMA Flat Notch package information** 

- Epoxy meets UL94, V0 

- Cooling method: by conduction (C) 

- Band indicates cathode 

**Figure 17. SMA Flat Notch package outline** 

**DS0792** - **Rev 13** 

**page 7/19** 

**STPS340 SMA Flat Notch package information** 

## **Table 4. SMA Flat Notch package mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|---|---|
|**Ref.**|**Millimeters**|||**Inches (for reference only)**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A1|0.90||1.10|0.035||0.044|
|A1||0.05|||0.002||
|b|1.25||1.65|0.049||0.065|
|C|0.15||0.40|0.005||0.016|
|D|2.25||2.90|0.088||0.115|
|E|5.00||5.35|0.196||0.211|
|E1|3.95||4.60|0.155||0.182|
|G||2.00|||0.079||
|G1||0.85|||0.033||
|L|0.75||1.20|0.029|||
|L1||0.45|||0.018||
|L2||0.45|||0.018||
|L3||0.05|||0.002||
|V|||8°|||8°|
|V1|||8°|||8°|



**Figure 18. SMA Flat Notch recommended footprint in mm (inches)** 

**==> picture [287 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.20 3.12 1.20<br>(0.047) (0.123) (0.047)<br>1.52<br>(0.060)<br>5.52<br>(0.217)<br>**----- End of picture text -----**<br>


**DS0792** - **Rev 13** 

**page 8/19** 

**STPS340 SMB package information** 

## **2.2 SMB package information** 

- Epoxy meets UL94, V0 

- Lead-free package 

**Figure 19. SMB package outline** 

**==> picture [303 x 237] intentionally omitted <==**

**----- Start of picture text -----**<br>
E1<br>D<br>E<br>A1<br>C A2<br>L b<br>**----- End of picture text -----**<br>


**Table 5. SMB package mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|
|**Ref.**|**Millimeters**||**Inches (for reference only)**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A1|1.90|2.45|0.074|0.097|
|A2|0.05|0.20|0.001|0.008|
|b|1.95|2.20|0.076|0.087|
|c|0.15|0.40|0.005|0.016|
|D|3.30|3.95|0.129|0.156|
|E|5.10|5.60|0.200|0.221|
|E1|4.05|4.60|0.159|0.182|
|L|0.75|1.50|0.029|0.060|



**DS0792** - **Rev 13** 

**page 9/19** 

**STPS340 SMB package information** 

## **Figure 20. SMB recommended footprint** 

**==> picture [226 x 113] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.62 2.60 1.62<br>(0.064) (0.102) (0.064)<br>2.18<br>(0.086)<br>5.84<br>(0.230)<br>**----- End of picture text -----**<br>


**DS0792** - **Rev 13** 

**page 10/19** 

**STPS340 SMB Flat package information** 

## **2.3 SMB Flat package information** 

- Epoxy meets UL94, V0 

- Lead-free package 

**Figure 21. SMB Flat package outline** 

**==> picture [304 x 204] intentionally omitted <==**

**----- Start of picture text -----**<br>
A<br>c<br>D<br>L 2x<br>L1  2x<br>E E1<br>L2  2x<br>b<br>**----- End of picture text -----**<br>


**Table 6. SMB Flat mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|---|---|
|**Ref.**|**Millimeters**|||**Inches**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|0.90||1.10|0.035||0.044|
|b|1.95||2.20|0.076||0.087|
|c|0.15||0.40|0.005||0.016|
|D|3.30||3.95|0.129||0.156|
|E|5.10||5.60|0.200||0.221|
|E1|4.05||4.60|0.159||0.182|
|L|0.75||1.50|0.029||0.060|
|L1||0.40|||0.016||
|L2||0.60|||0.024||



**DS0792** - **Rev 13** 

**page 11/19** 

**STPS340 SMB Flat package information** 

## **Figure 22. Footprint recommendations, dimensions in mm (inches)** 

**==> picture [154 x 141] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.20 3.44 1.20<br>(0.047) (0.136) (0.047)<br>2.07<br>(0.082)<br>5.84<br>(0.230)<br>millimeters<br>(inches)<br>**----- End of picture text -----**<br>


**DS0792** - **Rev 13** 

**page 12/19** 

**STPS340 SMC package information** 

## **2.4 SMC package information** 

- Epoxy meets UL94, V0 

## **Figure 23. SMC package outline** 

**==> picture [244 x 194] intentionally omitted <==**

**----- Start of picture text -----**<br>
E1<br>D<br>E<br>A1<br>A2<br>b<br>C<br>L<br>E2<br>**----- End of picture text -----**<br>


**Table 7. SMC package mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|
|**Ref.**|**Millimeters**||**Inches (for reference only)**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A1|1.90|2.45|0.0748|0.0965|
|A2|0.05|0.20|0.0020|0.0079|
|b|2.90|3.20|0.1142|0.1260|
|c|0.15|0.40|0.0059|0.0157|
|D|5.55|6.25|0.2185|0.2461|
|E|7.75|8.15|0.3051|0.3209|
|E1|6.60|7.15|0.2598|0.2815|
|E2|4.40|4.70|0.1732|0.1850|
|L|0.75|1.50|0.0295|0.0591|



**DS0792** - **Rev 13** 

**page 13/19** 

**STPS340 SMC package information** 

**Figure 24. SMC recommended footprint** 

**==> picture [234 x 153] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.54 5.11 1.54<br>(0.061) (0.201) (0.061)<br>3.14<br>(0.124)<br>8.19<br>(0.323)<br>millimeters<br>(inches)<br>**----- End of picture text -----**<br>


**DS0792** - **Rev 13** 

**page 14/19** 

**STPS340 DPAK package information** 

## **2.5 DPAK package information** 

- Epoxy meets UL 94,V0 

- Cooling method: by conduction (C) 

## **Figure 25. DPAK package outline** 

**==> picture [353 x 315] intentionally omitted <==**

**----- Start of picture text -----**<br>
E<br>A<br>b4<br>c2<br>Thermal pad<br>E1<br>L2<br>D1<br>D<br>H R<br>L4<br>A1<br>b R<br>e<br>e1 c<br>A2<br>L1<br>L<br>V2<br>G auge<br>0.25 plane<br>**----- End of picture text -----**<br>


_Note:_ 

_This package drawing may slightly differ from the physical package. However, all the specified dimensions are guaranteed._ 

**DS0792** - **Rev 13** 

**page 15/19** 

**STPS340 DPAK package information** 

**Table 8. DPAK package mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|
|**Ref.**|**Millimeters**||**Inches (for reference only)**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A|2.18|2.40|0.085|0.094|
|A1|0.90|1.10|0.035|0.043|
|A2|0.03|0.23|0.001|0.009|
|b|0.64|0.90|0.025|0.035|
|b4|4.95|5.46|0.194|0.215|
|c|0.46|0.61|0.018|0.024|
|c2|0.46|0.60|0.018|0.023|
|D|5.97|6.22|0.235|0.244|
|D1|4.95|5.60|0.194|0.220|
|E|6.35|6.73|0.250|0.265|
|E1|4.32|5.50|0.170|0.216|
|e|2.286 typ.||0.090 typ.||
|e1|4.40|4.70|0.173|0.185|
|H|9.35|10.40|0.368|0.409|
|L|1.0|1.78|0.039|0.070|
|L2||1.27||0.050|
|L4|0.60|1.02|0.023|0.040|
|V2|-8°|+8°|-8°|+8°|



**Figure 26. DPAK recommended footprint (dimensions in mm)** 

**==> picture [296 x 177] intentionally omitted <==**

**----- Start of picture text -----**<br>
12.7<br>6.7 3.0 3.0<br>A<br>4.572<br>6.7<br>B<br>1.6<br>The device must be positioned within 0.05 AB<br>**----- End of picture text -----**<br>


**DS0792** - **Rev 13** 

**page 16/19** 

**STPS340 Ordering Information** 

**3 Ordering information** 

**Table 9. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty.**|**Delivery mode**|
|---|---|---|---|---|---|
|STPS340AFN|A340|SMA Flat Notch|0.039 g|10 000|Tape and reel|
|STPS340U|U34|SMB|0.107 g|2500|Tape and reel|
|STPS340UF|FU34|SMB Flat|0.050 g|5000|Tape and reel|
|STPS340S|S34|SMC|0.243 g|10 000|Tape and reel|
|STPS340B-TR|S3 40|DPAK|0.320 g|2500|Tape and reel|



**DS0792** - **Rev 13** 

**page 17/19** 

**STPS340** 

## **Revision history** 

**Table 10. Document revision history** 

|**Date**|**Version**|**Changes**|
|---|---|---|
|Jul-2003|7|Last update.|
|Feb-2005|8|Layout update. No content change.|
|08-Feb-2007|9|Reformatted to current standard. Added ECOPACK statement. Added SMBflat package.|
|10-Feb-2009|10|Updated ECOPACK statement. Corrected Y axis in Figure 10.|
|23-Apr-2015|11|Updated DPAK and reformatted to current standard.|
|22-Sep-2016|12|Updated DPAK package information and reformatted to current standard.|
|08-Oct-2019|13|AddedSection  2.1  SMA Flat Notch package information.|



**DS0792** - **Rev 13** 

**page 18/19** 

**STPS340** 

## **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. For additional information about ST trademarks, please refer to www.st.com/trademarks. 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. 

© 2019 STMicroelectronics – All rights reserved 

**DS0792** - **Rev 13** 

**page 19/19** 



## Links

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- [Supplier page](https://es.farnell.com/stmicroelectronics/stps340b-tr/schottky-rectifier-40v-3a-to-252/dp/4035973)
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