# Schottky Rectifier, 120 V, 40 A, Dual Common Cathode, TO-220AB, 3 Pins, 1 V

![Product image](https://novapart.co/image/farnell:3366920/)

**URL**: https://novapart.co/products/STPS40120CT/schottky-rectifier-120-v-40-a-dual-common-cathode
**SKU**: STPS40120CT
**Manufacturer**: STMICROELECTRONICS
**Category**: Semiconductors - Discretes || Diodes & Rectifiers || Schottky Diodes || Schottky Rectifier Diodes
**Price**: €0.6160
**Stock**: 10+
**Lead Time**: 120 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 3Pins |
| Product Range | - |
| Qualification | - |
| Diode Mounting | Through Hole |
| Diode Case Style | TO-220AB |
| Diode Configuration | Dual Common Cathode |
| Forward Voltage Max | 1V |
| Forward Surge Current | 200A |
| Average Forward Current | 40A |
| Operating Temperature Max | 175°C |
| Repetitive Peak Reverse Voltage | 120V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3366920/)

**STPS40120C** 

Datasheet 

120 V power Schottky rectifier 

## **Features** 

**==> picture [436 x 122] intentionally omitted <==**

**----- Start of picture text -----**<br>
A1<br>K<br>A2 < • High junction temperature capability<br>• Avalanche rated<br>K K • Low leakage current<br>• Good trade-off between leakage current and forward voltage drop<br>• ECOPACK [®] 2 compliant<br>A2<br>K  [A2] a K<br>TO-220AB   A1 TO-220AB A1 Applications<br>narrow leads •<br>**----- End of picture text -----**<br>


- Switching diode 

- SMPS 

- DC/DC converter 

- LED lighting 

- Notebook adapter 

## **Description** 

This dual center tap Schottky rectifier is ideally suited for high frequency switch mode power supply. 

|**Product status link**<br>~~7~~|**Product status link**<br>~~7~~|
|---|---|
|STPS40120C||
|**Product summary**<br>~~See~~||
|**Symbol**<br>~~L~~|**Device**<br>~~Ld~~|
|**IF(AV)**|2 x 20 A|
|**VRRM**|120 V|
|**Tj (max.)**|175 °C|
|**VF (typ.)**|0.69 V|



Packaged in TO-220AB and TO-220AB narrow leads, the STPS40120C is optimized for use in notebook and LCD adapters, desktop SMPS, providing in these applications a margin between the remaining voltages applied on the diode and the voltage capability of the diode. 

**DS4231** - **Rev 4** - **June 2018** For further information contact your local STMicroelectronics sales office. 

www.st.com 

**STPS40120C Characteristics** 

**1** 

## **Characteristics** 

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

|**Symbol**|**Parameter**||**Value**|**Unit**|
|---|---|---|---|---|
|VRRM|Repetitive peak reverse voltage||120|V|
|IF(RMS)|Forward rms current||30|A|
|IF(AV)|Average forward current , Tc= 145 °C, δ = 0.5|Per diode|20|A|
|||Per device|40||
|IFSM|Surge non repetitive forward current|tp= 10 ms sinusoidal|200|A|
|PARM|Repetitive peak avalanche power|tp= 10 µs, Tj= 125 °C|755|W|
|Tstg|Storage temperature range||-65 to +175|°C|
|Tj|Maximum operating junction temperature(1)||175|°C|



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

**Table 2. Thermal resistance parameters** 

|**Symbol**|**Parameter**||**Max. value**|**Unit**|
|---|---|---|---|---|
|Rth(j-c)|Junction to case|Per diode|1.6|°C/W|
|||Total|0.85||
|Rth(c)|Coupling||0.1||



When the diodes 1 and 2 are used simultaneously: ΔTj(diode 1) = P(diode 1) x Rth(j-c)(per diode) + P(diode 2) x Rth(c) 

**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|-||25|µA|
|||Tj= 125 °C||-|4|12|mA|
|VF(2)|Forward voltage drop|Tj= 25 °C|IF= 7.5 A|-||0.73|V|
|||Tj= 125 °C||-|0.57|0.61||
|||Tj= 25 °C|IF= 20 A|-||0.90||
|||Tj= 125 °C||-|0.69|0.73||
|||Tj= 25 °C|IF= 40 A|-||1.00||
|||Tj= 125 °C||-|0.83|0.88||



_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 = 0.58 x IF(AV) + 0.0075 x IF[2] (RMS) 

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

**DS4231** - **Rev 4** 

**page 2/11** 

**STPS40120C Characteristics (curves)** 

- AN604: Calculation of conduction losses in a power rectifier 

- AN4021: Calculation of reverse losses on a power diode 

## **1.1 Characteristics (curves)** 

**==> picture [513 x 206] 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 (per diode) temperature (δ = 0.5, per diode)<br>20 PF(AV)(W) 22 IF(AV)(A)<br>18 δ = 0.5 20 Rth(j-a) =Rt h(j-c)<br>16 δ = 0.2 18<br>16<br>14 δ = 0.1 δ = 1<br>14<br>12 δ = 0.05<br>12<br>10 10 Rth(j-a) =15°C/W<br>8<br>8<br>6<br>6<br>T T<br>4 4<br>2 IF(AV)(A) δ=tp/T tp 2 δ =tp/T tp Tamb(°C)<br>0 0<br>0 2 4 6 8 10 12 14 16 18 20 22        24 0 25 50 75 100 125 150 175<br>**----- End of picture text -----**<br>


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

**----- Start of picture text -----**<br>
Figure 4. Relative variation of thermal impedance junction<br>Figure 3. Normalized avalanche power derating versus to case versus pulse duration<br>pulse duration (Tj = 125 °C)<br>PARM(tp) 1.0 Zth(j-c)/Rth(j-c)<br>1 PARM(10 µs) 0.9<br>0.8<br>0.7<br>0.1 0.6<br>0.5<br>0.4<br>0.01 0.3<br>0.2<br>Single pulse<br>0.1<br>0.001 t p(µs) 0.0 tp(s)<br>1 10 100 1000 1.E-03 1.E-02 1.E-01 1.E+00<br>**----- End of picture text -----**<br>


**DS4231** - **Rev 4** 

**page 3/11** 

**STPS40120C Characteristics (curves)** 

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

**----- Start of picture text -----**<br>
Figure 5. Reverse leakage current versus reverse voltage Figure 6. Junction capacitance versus reverse voltage<br>applied (typical values, per diode) applied (typical values, per diode)<br>1.E+02 IR(mA) 1000 C(pF)<br>F= 1MHz<br>1.E+01 T =150°Cj VOSCT = 25°Cj=30mVRMS<br>1.E+00 T =125°Cj<br>T =100°Cj<br>1.E-01<br>T =75°Cj 100<br>1.E-02 T =50°Cj<br>1.E-03<br>T =25°Cj<br>1.E-04<br>VR(V) VR(V)<br>1.E-05 10<br>0 10 20 30 40 50 60 70 80 90 100 110 120 1 10 100<br>**----- End of picture text -----**<br>


**Figure 7. Forward voltage drop versus forward current (per diode)** 

**==> picture [225 x 146] intentionally omitted <==**

**----- Start of picture text -----**<br>
I  (A)F<br>100<br>T= 125°Cj<br>(maximum values)<br>(typical values)T= 125°Cj (maximum values)T= 25°Cj<br>10<br>V  (V)F<br>1<br>0.0 0 .2 0.4 0 .6 0.8 1 .0 1.2 1.4<br>**----- End of picture text -----**<br>


**DS4231** - **Rev 4** 

**page 4/11** 

**STPS40120C 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 TO-220AB package information** 

- Epoxy meets UL 94,V0 

- Cooling method: by conduction (C) 

- Recommended torque value: 0.55 N·m 

- Maximum torque value: 0.70 N·m 

## **Figure 8. TO-220AB package outline** 

**==> picture [309 x 368] intentionally omitted <==**

**DS4231** - **Rev 4** 

**page 5/11** 

**STPS40120C TO-220AB package information** 

## **Table 4. TO-220AB package mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|
|**Ref.**|**Millimeters**||**Inches (for reference only)**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A|4.40|4.60|0.173|0.181|
|b|0.61|0.88|0.240|0.035|
|b1|1.14|1.55|0.045|0.061|
|c|0.48|0.70|0.019|0.028|
|D|15.25|15.75|0.600|0.620|
|D1|1.27 typ.||0.050 typ.||
|E|10.00|10.40|0.394|0.409|
|e|2.40|2.70|0.094|0.106|
|e1|4.95|5.15|0.195|0.203|
|F|1.23|1.32|0.048|0.052|
|H1|6.20|6.60|0.244|0.260|
|J1|2.40|2.72|0.094|0.107|
|L|13.00|14.00|0.512|0.551|
|L1|3.50|3.93|0.138|0.155|
|L20|16.40 typ.||0.646 typ.||
|L30|28.90 typ.||1.138 typ.||
|θP|3.75|3.85|0.148|0.152|
|Q|2.65|2.95|0.104|0.116|



**DS4231** - **Rev 4** 

**page 6/11** 

**STPS40120C TO-220AB narrow leads package information** 

## **2.2 TO-220AB narrow leads package information** 

- Epoxy meets UL94, V0 

- Cooling method: by conduction (C) 

- Recommended torque value: 0.55 N·m 

- Maximum torque value: 0.70 N·m 

**Figure 9. TO-220AB narrow leads package outline** 

**==> picture [441 x 393] intentionally omitted <==**

**----- Start of picture text -----**<br>
ØP A<br>E<br>F<br>Q<br>H1<br>D<br>D1<br>L20<br>L30<br>L1<br>b1(x3)<br>J1<br>L<br>1 2 3 C<br>e<br>b (x3)<br>e1<br>**----- End of picture text -----**<br>


**DS4231** - **Rev 4** 

**page 7/11** 

**STPS40120C** 

**TO-220AB narrow leads package information** 

## **Table 5. TO-220AB narrow leads package mechanical data** 

||**Dimensions**|**Dimensions**|**Dimensions**|**Dimensions**|
|---|---|---|---|---|
|**Ref.**|**Millimeters**||**Inches (for reference only)**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A|4.40|4.60|0.173|0.181|
|b|0.61|0.88|0.240|0.035|
|b1|0.95|1.20|0.037|0.047|
|c|0.48|0.70|0.019|0.028|
|D|15.25|15.75|0.600|0.620|
|D1|1.27 typ.||0.050 typ.||
|E|10.00|10.40|0.394|0.409|
|e|2.40|2.70|0.094|0.106|
|e1|4.95|5.15|0.195|0.203|
|F|1.23|1.32|0.048|0.052|
|H1|6.20|6.60|0.244|0.260|
|J1|2.40|2.72|0.094|0.107|
|L|13.00|14.00|0.512|0.551|
|L1|2.60|2.90|0.138|0.155|
|L20|15.40 typ.||0.646 typ.||
|L30|28.90 typ.||1.138 typ.||
|θP|3.75|3.85|0.148|0.152|
|Q|2.65|2.95|0.104|0.116|



**DS4231** - **Rev 4** 

**page 8/11** 

**STPS40120C Ordering information** 

## **3 Ordering information** 

**Table 6. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty.**|**Delivery mode**|
|---|---|---|---|---|---|
|STPS40120CT|STPS40120CT|TO-220AB|1.95 g|50|Tube|
|STPS40120CTN|PS40120CTN|TO-220AB<br>narrow leads|1.9 g|50|Tube|



**DS4231** - **Rev 4** 

**page 9/11** 

**STPS40120C** 

## **Revision history** 

**Table 7. Document revision history** 

|**Date**|**Version**|**Changes**|
|---|---|---|
|18-Feb-2005|1|First issue|
|1-Dec-2006|2|Reformatted to current standards. Added I2PAK.|
|15-Sep-2011|3|Added TO-220AB narrow leads package.|
|21-Jun-2018|4|Removed I²PAK package, figure 4 and figure 5.<br>UpdatedFigure 3. Normalized avalanche power derating versus pulse<br>duration (Tj= 125 °C)andTable 1. Absolute ratings (limiting values at 25 °C<br>unless otherwise specified, per diode).<br>Minor text changes to improve readability.|



**DS4231** - **Rev 4** 

**page 10/11** 

**STPS40120C** 

## **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 

**DS4231** - **Rev 4** 

**page 11/11** 



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- [Supplier page](https://es.farnell.com/stmicroelectronics/stps40120ct/schottky-rectifier-120v-40a-to/dp/3366920)
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