# Schottky Rectifier, 40 V, 3 A, Dual Common Cathode, TO-252 (DPAK), 3 Pins, 630 mV

![Product image](https://novapart.co/image/farnell:4035976/)

**URL**: https://novapart.co/products/STPS640CB-TR/schottky-rectifier-40-v-3-a-dual-common-cathode-to
**SKU**: STPS640CB-TR
**Manufacturer**: STMICROELECTRONICS
**Category**: Semiconductors - Discretes || Diodes & Rectifiers || Schottky Diodes || Schottky Rectifier Diodes
**Price**: €0.2200
**Stock**: 1000+
**Lead Time**: 120 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 3Pins |
| Product Range | - |
| Qualification | - |
| Diode Mounting | Surface Mount |
| Diode Case Style | TO-252 (DPAK) |
| Diode Configuration | Dual Common Cathode |
| Forward Voltage Max | 630mV |
| 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:4035976/)

## **STPS640C** 

## Power Schottky rectifier 

Datasheet - production data 

**==> picture [126 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
A1<br>K<br>A2<br>a<br>K<br>K<br>A2<br>A2<br>A1<br>A1<br>DPAK<br>**----- End of picture text -----**<br>


## **Features** 

- Very small conduction losses 

## **Description** 

This dual Schottky rectifier is designed for switch mode power supplies and other power converters. 

This device is intended for use in low and medium voltage operation, and in particular high frequency circuits where low switching losses are required (free wheeling and polarity protection). 

**Table 1: Device summary** 

**Symbol Value** IF(AV) 2 x 3 A VRRM 40 V Tj (max) 150 °C ~~==>~~ VF  (typ) 0.50 V 

- Extremely fast switching 

- Low thermal resistance 

- Negligible switching losses 

- Low forward voltage drop 

- Low capacitance 

- Avalanche specification 

- ECOPACK[®] 2 compliant component for DPAK on demand 

May 2017 DocID3628 Rev 9 

1/8 

This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**STPS640C** 

## **1 Characteristics** 

**Table 2: Absolute ratings (limiting values at 25 °C, per diode, unless otherwise specified)** 

|**Symbol**|**Parameter**|**Parameter**|**Value**|**Uni**<br>**t**|
|---|---|---|---|---|
|VRRM|Repetitivepeak reverse voltage||40|V|
|IF(RMS)|Forward rms current||6|A|
|IF(AV)|Average forward current δ = 0.5, square wave|TC= 135 °C|3|A|
|IFSM|Surge non repetitive forward current|tp= 10 ms sinusoidal|75|A|
|PARM|Repetitive peak avalanche power|tp = 10 µs<br>Tj= 125 °C|90|W|
|Tstg|Storage temperature range||-65 to +150|°C|
|Tj|Maximum operating junction temperature_(1)_||150|°C|



## **Notes:** 

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

**Table 3: Thermal parameters** 

|**Symbol**|**Parameter**||**Max. value**|**Unit**|
|---|---|---|---|---|
|Rth(j-c)|Junction to case|Per diode<br>Per device|5.5|°C/W|
||||3||
|Rth(c)|Coupling||0.5||



When the diodes 1 and 2 are used simultaneously: 

ΔTj (diode1) = P(diode1) x Rth(j-c) (per diode) + P(diode2) x Rth(c) 

**Table 4: Static electrical characteristics (per diode)** 

|**Symbol**|**Parameter**|**Test conditions**|**Test conditions**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|---|---|
|IR_(1)_|Reverse leakage current|Tj= 25 °C|VR= VRRM|-||100|µA|
|||Tj= 125 °C||-|2|10|mA|
|VF_(2)_|Forward voltage drop|Tj= 25 °C|IF= 3 A|-||0.63|V|
|||Tj= 125 °C||-|0.50|0.57||
|||Tj= 25 °C|IF= 6 A|-||0.84||
|||Tj= 125 °C||-|0.67|0.72||



## **Notes:** 

(1)Pulse test: tp = 5 ms, δ < 2% 

(2)Pulse test: tp = 380 µs, δ < 2% 

To evaluate the conduction losses, use the following equation: 

P = 0.42 x IF(AV) + 0.050 x IF[2] (RMS) 

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**STPS640C** 

**Characteristics** 

## **1.1 Characteristics (curves)** 

**Figure 1: Average forward power dissipation versus average forward current(per diode)** 

**==> picture [197 x 133] intentionally omitted <==**

**Figure 2: Average forward current versus ambient temperature (per diode, δ = 0.5)** 

**==> picture [55 x 39] intentionally omitted <==**

**Figure 3: Normalized avalanche power derating versus pulse duration (Tj = 125 °C)** 

**==> picture [172 x 128] intentionally omitted <==**

**Figure 4: Relative variation of thermal impedance junction to case versus pulse duration** 

**==> picture [199 x 129] intentionally omitted <==**

**==> picture [453 x 182] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 5: Reverse leakage current versus reverse  Figure 6: Junction capacitance versus reverse<br>voltage applied (typical values, per diode)  voltage applied (typical values, per diode)<br>**----- End of picture text -----**<br>


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**STPS640C** 

## **Characteristics** 

**==> picture [450 x 177] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 7: Forward voltage drop versus forward  Figure 8: Thermal resistance junction to ambient<br>current (maximum values, per diode)  versus copper surface under tab<br>**----- End of picture text -----**<br>


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**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. 

- Cooling method: by conduction (C) 

- Epoxy meets UL 94,V0 

## **2.1 DPAK package information** 

**Figure 9: DPAK package outline** 

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

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**Package** information 

**Table 5: DPAK package mechanical data** 

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



**Figure 10: DPAK recommended footprint (dimensions in mm)** 

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**Ordering** information 

**STPS640C** 

## **3 Ordering information** 

**Table 6: Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|STPS640CB|S6 40C|DPAK|0.32 g|75|Tube|
|STPS640CB-TR|S6 40C|||2500|Tape and reel|



## **4 Revision history** 

**Table 7: Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|Aug-2003|6B|Last issue|
|22-Mar-2007|7|Updated_Figure 8_Updated ECOPACK statement.|
|20-Nov-2014|8|_Figure 3._Removed PARM (Tj = 25 °C), TO-220AB and TO-220FPAB<br>package information.|
|16-May-2017|9|Updated DPAK package information and reformatted to current<br>standard.|



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**STPS640C** 

## **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. 

© 2017 STMicroelectronics – All rights reserved 

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## Links

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