# Bipolar (BJT) Single Transistor, NPN, 60 V, 5 A, 1.6 W, SOT-223, Surface Mount

![Product image](https://novapart.co/image/farnell:9935495/)

**URL**: https://novapart.co/products/STN851/bipolar-bjt-single-transistor-npn-60-v-5-a-16-w
**SKU**: STN851
**Manufacturer**: STMICROELECTRONICS
**Price**: €0.3650
**Stock**: 1000+
**Lead Time**: 113 days (indicative)

## Description

Transistor Polarity:NPN; Collector Emitter Voltage V(br)ceo:60V; Transition Frequency ft:130MHz; Power Dissipation Pd:1.6W; DC Collector Current:5A; DC Current Gain hFE:300hFE; Transistor Case S

## Specifications

| Parameter | Value |
|---|---|
| Msl | - |
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 3Pins |
| Product Range | - |
| Qualification | - |
| Power Dissipation | 1.6W |
| Transistor Mounting | Surface Mount |
| Transistor Polarity | NPN |
| Transition Frequency | 130MHz |
| Transistor Case Style | SOT-223 |
| Dc Current Gain Hfe Min | 300hFE |
| Operating Temperature Max | 150°C |
| Continuous Collector Current | 5A |
| Collector Emitter Voltage Max | 60V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:9935495/)

**STN851** 

Low voltage fast-switching NPN power transistor 

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## **Features** 

- Very low collector to emitter saturation voltage 

- High current gain characteristic 

- Fast-switching speed 

## **Applications** 

- Emergency lighting 

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4<br>3<br>2<br>1<br>SOT-223<br>**----- End of picture text -----**<br>


- Voltage regulators 

- Relay drivers 

- High efficiency low voltage switching applications 

## **Figure 1. Internal schematic diagram** 

## **Description** 

The device is manufactured in Planar Technology with "Base Island" layout. 

The resulting transistor shows exceptional high gain performance coupled with very low saturation voltage. 

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**Table 1. Device summary** 

|**Order code**|**Marking**|**Package**|**Packaging**|
|---|---|---|---|
|STN851|N851|SOT-223|Tape and reel|



1/10 

March 2009 

Rev 7 

_www.st.com_ 

**STN851** 

**Electrical ratings** 

## **1 Electrical ratings** 

## **Table 2. Absolute maximum ratings** 

|**Table 2.**|**Absolute maximum ratings**|||
|---|---|---|---|
|**Symbol**|**Parameter**|**Value**|**Unit**|
|VCBO|Collector-base voltage (IE= 0)|150|V|
|VCEO|Collector-emitter voltage (IB= 0)|60|V|
|VEBO|Emitter-base voltage (IC= 0)|7|V|
|IC|Collector current|5|A|
|ICM|Collector peak current (tP< 5 ms)|10|A|
|IB|Base current|1|A|
|IBM|Base peak current (tP< 5 ms)|2|A|
|Ptot|Total dissipation at Tamb= 25 °C|1.6|W|
|Tstg|Storage temperature|-65 to 150|°C|
|TJ|Max. operating junction temperature|150|°C|



## **Table 3. Thermal data** 

|**Table 3.**|**Thermal data**|||
|---|---|---|---|
|**Symbol**|**Parameter**|**Value**|**Unit**|
|Rthj-amb|Thermal resistance junction-ambient(1)|78|°C/W|



1. Device mounted on a p.c.b. area of 1 cm[2] 

2/10 

**STN851** 

**Electrical characteristics** 

## **2 Electrical characteristics** 

(Tcase = 25 °C unless otherwise specified) 

## **Table 4. Electrical characteristics** 

|**Symbol**|**Parameter**|**Test conditions**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|---|
|ICBO|Collector cut-off current<br>(IE= 0)|VCB= 120 V<br>VCB= 120 V   Tc= 100oC|||50<br>1|nA<br>µA|
|IEBO|Emitter cut-off current<br>(IC= 0)|VEB= 7 V|||10|nA|
|V(BR)CBO|Collector-base<br>breakdown voltage<br>(IE= 0)|IC= 100 µA|150|||V|
|V(BR)CEO<br>(1)|Collector-emitter<br>breakdown voltage<br>(IB= 0)|IC= 10 mA|60|||V|
|V(BR)EBO|Emitter-base breakdown<br>voltage (IC= 0)|IE= 100 µA|7|||V|
|VCE(sat)<br>(1)|Collector-emitter<br>saturation voltage|IC= 100 mA IB= 5 mA<br>IC= 1 A_   _IB= 50 mA<br>IC= 2 A IB= 50 mA<br>IC= 5 A_   _IB= 200 mA||10<br>70<br>140<br>320|50<br>120<br>250<br>500|mV<br>mV<br>mV<br>mV|
|VBE(sat)<br>(1)|Base-emitter saturation<br>voltage|IC= 4 A_   _IB= 200 mA||1|1.15|V|
|VBE(on)<br>(1)|Base-emitter on voltage|IC= 4 A_   _VCE= 1 V||0.89|1|V|
|hFE<br>(1)|DC current gain|IC= 10 mA VCE= 1 V<br>IC= 2 A_   _VCE= 1 V<br>IC= 5 A VCE= 1 V<br>IC= 10 A_VCE= 1 V|150<br>150<br>90<br>30|300<br>270<br>140<br>50|350||
|fT|Transition frequency|VCE= 10 V        IC= 100 mA||130||MHz|
|CCBO|Collector-base<br>capacitance (IE= 0)|VCB= 10 V        f = 1 MHz||50||pF|
|ton<br>ts<br>tf|Resistive load<br>Turn-on time<br>Storage time<br>Fall time|IC= 1 A            VCC= 10 V<br>IB1= -IB2= 0.1 A||50<br>1.35<br>120||ns<br>µs<br>ns|



1. Pulse duration = 300 µs, duty cycle ≤  1.5% 

3/10 

**STN851** 

**Electrical characteristics** 

## **2.1 Electrical characteristics (curves)** 

## **Figure 2. Derating curve** 

## **Figure 3. DC current gain** 

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**Figure 4. Collector-emitter saturation voltage** 

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**Figure 5. Collector-emitter saturation voltage** 

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**Figure 6. Base-emitter saturation voltage** 

**Figure 7. Base-emitter on voltage** 

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4/10 

**STN851** 

**Electrical characteristics** 

## **Figure 8. Resistive load switching time** 

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## **Figure 10. Resistive load switching time** 

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## **Figure 9. Resistive load switching time** 

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## **Figure 11. Inductive load switching time** 

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## **Figure 12. Inductive load switching time** 

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5/10 

**STN851** 

**Electrical characteristics** 

## **2.2 Test circuit** 

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**----- Start of picture text -----**<br>
Figure 13. Resistive load switching test circuit<br>1) Fast electronic switch<br>2) Non-inductive resistor<br>**----- End of picture text -----**<br>


6/10 

**STN851** 

**Package mechanical data** 

## **3 Package mechanical data** 

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 products status are available at: www.st.com. ECOPACK is an ST trademark. 

7/10 

**STN851** 

**Package mechanical data** 

||**SOT-223 mechanical data**|**SOT-223 mechanical data**|**SOT-223 mechanical data**|
|---|---|---|---|
|||||
|||||
|**DIM.**|**mm.**|||
||**min.**|**typ**|**max.**|
|A|||1.80|
|A1|0.02||0.1|
|B|0.60|0.70|0.85|
|B1|2.90|3.00|3.15|
|c|0.24|0.26|0.35|
|D|6.30|6.50|6.70|
|e||2.30||
|e1||4.60||
|E|3.30|3.50|3.70|
|H|6.70|7.00|7.30|
|V|||10 o|
|||||



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0046067_L<br>**----- End of picture text -----**<br>


8/10 

**STN851** 

**Revision history** 

## **4 Revision history** 

**Table 5. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|09-Sep-2003|6||
|16-Mar-2009|7|Updated SOT-223 mechanical data|



9/10 

**STN851** 

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10/10 



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