# Small Signal Schottky Diode, Dual Common Cathode, 120 V, 40 A, 830 mV, 210 A, 150 °C

![Product image](https://novapart.co/image/farnell:2325942/)

**URL**: https://novapart.co/products/STPS40SM120CT/small-signal-schottky-diode-dual-common-cathode
**SKU**: STPS40SM120CT
**Manufacturer**: STMICROELECTRONICS
**Category**: Semiconductors - Discretes || Diodes & Rectifiers || Schottky Diodes || Small Signal Schottky Diodes
**Price**: €1.9000
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| No. Of Pins | 3Pins |
| Product Range | STPS4 |
| Diode Mounting | Through Hole |
| Diode Case Style | TO-220AB |
| Diode Configuration | Dual Common Cathode |
| Forward Voltage Max | 830mV |
| Forward Surge Current | 210A |
| Average Forward Current | 40A |
| Operating Temperature Max | 150°C |
| Repetitive Peak Reverse Voltage | 120V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2325942/)

## **STPS40SM120C** 

## Power Schottky rectifier 

## **Datasheet** - **production data** 

## **Description** 

This Schottky diode is suited for high frequency switch mode power supply. 

Packaged in TO-220AB narrow leads, TO-220AB and I[2] PAK, this device is intended to be used in notebook, game station and desktop adapters, providing in these applications a good efficiency at both low and high load. 

**Table 1. Device summary** 

**==> picture [144 x 80] intentionally omitted <==**

**----- Start of picture text -----**<br>
|||
|---|---|
|Symbol|Value|
|I|2 X 20 A|
|F(AV)|
|VRRM|120 V|
|T|150 °C|
|j|
|VF (typ)|0.46 V|

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


## **Figure 1. Electrical characteristics[(a)]** 

## **Features** 

- High current capability 

- Avalanche rated 

- Low forward voltage drop 

- High frequency operation 

- ECOPACK[®] 2 compliant component on TO-220AB. 

**==> picture [170 x 155] intentionally omitted <==**

**----- Start of picture text -----**<br>
I<br>V<br>"Forward"<br>I<br>2 x IO X<br>IF<br>IO X<br>VRRM<br>VAR VR<br>V<br>IR<br>VTo VF(Io) VF VF(2xIo)<br>"Reverse"<br>IAR<br>**----- End of picture text -----**<br>


- a. VARM and IARM must respect the reverse safe operating area defined in _Figure 9_ . VAR and IAR are pulse measurements (tp < 10 µs). VR, IR, VRRM and VF, are static characteristics 

November 2014 

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This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**STPS40SM120C** 

## **1 Characteristics** 

**Table 2. Absolute ratings (limiting values with terminals 1 and 3 short circuited at Tamb = 25 °C, unless otherwise specified)** 

|**Symbol**|**Parameter**||**Value**|**Unit**|
|---|---|---|---|---|
|VRRM|Repetitive peak reverse voltage||120|V|
|IF(RMS)|Forward rms current||30|A|
|IF(AV)|Average forward current|Per diode, TC= 125 °C|20|A|
|||Per device, TC= 115 °C|40||
|IFSM|Surge non repetitive forward current|tp= 10 ms sine-wave|210|A|
|PARM<br>(1)|Repetitive peak avalanche power|Tj= 125 °C, tp= 10 µs|1150|W|
|VARM<br>(2)|Maximum repetitive peak avalanche voltage|tp< 10 µs, Tj< 125 °C, IAR< 7.7 A|150|V|
|VASM<br>(2)|Maximum single-pulse peak avalanche voltage|tp< 10 µs, Tj< 125 °C, IAR< 7.7 A|150|V|
|Tstg|Storage temperature range||-65 to +175|°C|
|Tj|Maximum operating junction temperature(3)||150|°C|



1. For pulse time duration deratings, please refer to _Figure 4_ . More details regarding the avalanche energy measurements and diode validation in the avalanche are provided in the STMicroelectronics Application notes AN1768, “Admissible avalanche power of schottky diodes” and AN2025, “Converter improvement using Schottky rectifier avalanche specification”. 

2. See _Figure 9_ 

dPtot 1 3. < condition to avoid thermal runaway for a diode on its own heatsink dTj Rth(j-a) 

**Table 3. Thermal resistance** 

||**Table 3. Thermal resistance**||||
|---|---|---|---|---|
|**Symbol**|**Parameter**||**Value**|**Unit**|
|Rth(j-c)|Junction to case|Per diode|1.35|°C/W|
|||Total|0.93||
|Rth(c)|Coupling||0.50||



When the two diodes 1 and 2 are used simultaneously: 

Δ Tj(diode 1) = P(diode 1) x Rth(j-c)(Per diode) + P(diode 2) x Rth(c) 

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**STPS40SM120C** 

**Characteristics** 

**Table 4. Static electrical characteristics (terminals 1 and 3 short circuited)** 

|**Symbol**|**Parameter**|**Test conditions**|**Test conditions**|**Min.**<br>**Typ.**|**Typ.**<br>**Max.**<br>**Unit**|**Unit**|
|---|---|---|---|---|---|---|
|IR<br>(1)<br>Reverse leakage current|Reverse leakage current<br>Tj= 25 °C<br>Tj= 125 °C|= 25 °C|VR= VRRM|-<br>55|275|µA|
|||= 125 °C||-<br>20|50|mA|
|VF<br>(2)<br>Forward voltage drop|Forward voltage drop<br>Tj= 125 °C<br>Tj= 125 °C<br>Tj= 25 °C<br>Tj= 125 °C|= 125 °C|IF= 5 A|-<br>0.46|0.46<br>0.51|V|
|||= 125 °C|IF= 10 A|-<br>0.55|0.55<br>0.60||
|||= 25 °C|IF= 20 A|-|0.83||
|||= 125 °C||-<br>0.63|0.63<br>0.69||



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 = 0.52 x IF(AV) + 0.0085 x IF[2] (RMS) 

**Figure 2. Average forward power dissipation Figure 3. Average forward current versus versus average forward current ambient temperature (** δ **= 0.5)** 

**==> picture [450 x 189] intentionally omitted <==**

**----- Start of picture text -----**<br>
20 PF(AV)(W) 24 IF(AV)(A)<br>δ = 0.5<br>Rth(j-a) = Rth(j-c)<br>16 Pt]See| PTeeePc TP  TT eevee δ = 1 20 pitti{| | tiffpi4<br>δ = 0.2<br>a | |<br>δ = 0.1 y, 16 aa<br>12<br>δ = 0.05<br>A LZ 12 a<br>8<br>8<br>OA | See<br>4 T<br>4<br>HHH ee ER<br>δ = tp / T tp IF(AV)(A) Tamb(°C)<br>0 ~A; ett | 0 eeePt a<br>0 4 8 12 16 20 24 28 0 25 50 75 100 125 150<br>Figure 4. Normalized avalanche power  Figure 5. Relative variation of thermal<br>derating versus pulse duration impedance junction to case versus<br>pulse duration<br>**----- End of picture text -----**<br>


**Figure 4. Normalized avalanche power derating versus pulse duration** 

**==> picture [214 x 140] intentionally omitted <==**

**----- Start of picture text -----**<br>
Zth(j-c)/Rth(j-c)<br>1.0<br>0.9 [oT[oT[TT TTTTiti TtTT TT TTPTTATTerTET TTT<br>0.8 [oT Titi TT TT ATTT<br>[oT TTeT)<br>0.7 [oT Titi TT Tn ATTT)<br>0.6 [oT Titi TT Tr TT<br>0.5 [oT[oTaa A a  TTTTTTa)2<br>0.4 [oT TTTArn)<br>0.3 Single pulse<br>0.2 SAA[oTaet a  TiaeeSetteTT eectit ec<br>0.1<br>arT PT t p (s) IT]<br>0.0 LT Triti<br>1.E-04 1.E-03 1.E-02 1.E-01 1.E+00<br>**----- End of picture text -----**<br>


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**Characteristics** 

**STPS40SM120C** 

**Figure 6. Reverse leakage current versus reverse voltage applied (typical values)** 

## **Figure 7. Junction capacitance versus reverse voltage applied (typical values)** 

**==> picture [463 x 146] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.E+02 IR(mA) 10000 C(pF)<br>F=1MHz<br>Tj=150°C V osc T=30mV j =25°C RMS<br>1.E+01<br>Tj=125°C<br>1.E+00 Tj=100°C<br>T j =75°C 1000<br>1.E-01 Tj=50°C<br>1.E-02 Tj=25°C<br>1.E-03 V R (V) 100 VR(V)<br>0 10 20 30 40 50 60 70 80 90 100 110 120 1 10 100 1000<br>**----- End of picture text -----**<br>


## **Figure 8. Forward voltage drop versus forward current** 

## **Figure 9. Reverse safe operating area (tp < 10 µs and Tj < 125 °C)** 

**==> picture [463 x 147] intentionally omitted <==**

**----- Start of picture text -----**<br>
1000.0 IFM(A)<br>10.0 Iarm (A)<br>100.0 (Maximum values) Tj=125°C 9.59.0<br>Tj=125°C 8.5<br>10.0 (Typical values) (Maximum values)Tj=25°C 8.0<br>7.5<br>1.0 7.0<br>6.5 Varm (V)<br>0.1 VFM(V) 120 130 140 150 160 170<br>0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6<br>**----- End of picture text -----**<br>


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**Package information** 

## **2 Package information** 

- Epoxy meets UL94, V0 

- Cooling method: by conduction (C) 

- Recommended torque value for TO-220AB: 0.4 N·m to 0.6 N·m 

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. 

**Figure 10. TO-220AB narrow leads dimension definitions** 

**==> picture [398 x 268] intentionally omitted <==**

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**STPS40SM120C** 

**Package information** 

**Table 5. TO-220AB narrow leads dimension values** 

||**Table 5. TO-220AB narrow leads dimension values**|**Table 5. TO-220AB narrow leads dimension values**|**Table 5. TO-220AB narrow leads dimension values**|**Table 5. TO-220AB narrow leads dimension values**|**Table 5. TO-220AB narrow leads dimension values**|**Table 5. TO-220AB narrow leads dimension values**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|4.40||4.60|0.17||0.18|
|b|0.61||0.88|0.024||0.034|
|b1|0.95||1.20|0.037||0.047|
|c|0.48||0.70|0.019||0.027|
|D|15.25||15.75|0.60||0.62|
|D1|1.27|||0.05|||
|E|10.00||10.40|0.39||0.41|
|e|2.40||2.70|0.094||0.106|
|e1|4.95||5.15|0.19||0.20|
|F|1.23||1.32|0.048||0.052|
|H1|6.20||6.60|0.24||0.26|
|J1|2.40||2.72|0.095||0.107|
|L|13.00||14.00|0.51||0.55|
|L1|2.60||2.90|0.102||0.114|
|L20|15.40|||0.61|||
|L30|28.90|||1.14|||
|∅P|3.75||3.85|0.147||0.151|
|Q|2.65||2.95|0.104||0.116|



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**Package information** 

## **Figure 11. TO-220AB dimension definitions** 

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**STPS40SM120C** 

**Package information** 

**Table 6. TO-220AB dimension values** 

||**Table 6. TO-220AB dimension values**|**Table 6. TO-220AB dimension values**|**Table 6. TO-220AB dimension values**|**Table 6. TO-220AB dimension values**|
|---|---|---|---|---|
|**Ref.**|**Dimensions**||||
||**Millimeters**||**Inches**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A|4.40|4.60|0.17|0.181|
|b|0.61|0.88|0.024|0.035|
|b1|1.14|1.50|0.045|0.059|
|c|0.48|0.70|0.019|0.027|
|D|15.25|15.75|0.60|0.62|
|D1|1.27 typ.||0.05 typ.||
|E|10|10.40|0.39|0.41|
|e|2.40|2.70|0.094|0.106|
|e1|4.95|5.15|0.19|0.20|
|F|1.23|1.32|0.048|0.052|
|H1|6.20|6.60|0.24|0.26|
|J1|2.40|2.72|0.094|0.107|
|L|13|14|0.51|0.55|
|L1|3.50|3.93|0.137|0.154|
|L20|16.40 typ.||0.64 typ.||
|L30|28.90 typ.||1.13 typ.||
|∅P|3.75|3.85|0.147|0.151|
|Q|2.65|2.95|0.104|0.116|



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**Package information** 

## **Figure 12. I²PAK dimension definitions** 

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**Package information** 

**Table 7. I²PAK dimension values** 

||**Table 7. I²PAK dimension values**|**Table 7. I²PAK dimension values**|**Table 7. I²PAK dimension values**|**Table 7. I²PAK dimension values**|
|---|---|---|---|---|
|**Ref.**|**Dimensions**||||
||**Millimeters**||**Inches**||
||**Min.**|**Max.**|**Min.**|**Max.**|
|A|4.40|4.60|0.173|0.181|
|A1|2.40|2.72|0.094|0.107|
|b|0.61|0.88|0.024|0.035|
|b1|1.14|1.70|0.044|0.067|
|c|0.49|0.70|0.019|0.028|
|c2|1.23|1.32|0.048|0.052|
|D|8.95|9.35|0.352|0.368|
|e|2.40|2.70|0.094|0.106|
|e1|4.95|5.15|0.195|0.203|
|E|10|10.40|0.394|0.409|
|L|13|14|0.512|0.551|
|L1|3.50|3.93|0.138|0.155|
|L2|1.27|1.40|0.050|0.055|



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**Ordering information** 

## **3 Ordering information** 

**Table 8. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|STPS40SM120CR|PS40SM120CR|I2PAK|1.49 g|50|Tube|
|STPS40SM120CTN|PS40SM120CTN|TO-220AB<br>narrow leads|1.9 g|50|Tube|
|STPS40SM120CT|PS40SM120CT|TO-220AB|2.2 g|50|Tube|



## **4 Revision history** 

**Table 9. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|02-Apr-2012|1|First issue.|
|04-Nov-2014|2|Added TO-220AB and TO-220FPAB package information.|



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**STPS40SM120C** 

## **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. 

© 2014 STMicroelectronics – All rights reserved 

12/12 DocID022917 Rev 2 



## Links

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- [Supplier page](https://es.farnell.com/en-ES/stmicroelectronics/stps40sm120ct/diode-schottky-2x20a-120v-to-220ab/dp/2325942)
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