# Bipolar (BJT) Single Transistor, PNP, 40 V, 5 A, 1.6 W, SOT-223, Surface Mount

![Product image](https://novapart.co/image/farnell:2354515/)

**URL**: https://novapart.co/products/2STN2540/bipolar-bjt-single-transistor-pnp-40-v-5-a-16-w
**SKU**: 2STN2540
**Manufacturer**: STMICROELECTRONICS
**Price**: €0.1780
**Stock**: 10+
**Lead Time**: 113 days (indicative)

## Description

Transistor Polarity:PNP; Collector Emitter Voltage V(br)ceo:-40V; Transition Frequency ft:-; Power Dissipation Pd:1.6W; DC Collector Current:-5A; DC Current Gain hFE:250hFE; Tran

## Specifications

| Parameter | Value |
|---|---|
| Msl | MSL 1 - Unlimited |
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 3Pins |
| Product Range | - |
| Qualification | - |
| Power Dissipation | 1.6W |
| Transistor Mounting | Surface Mount |
| Transistor Polarity | PNP |
| Transition Frequency | - |
| Transistor Case Style | SOT-223 |
| Dc Current Gain Hfe Min | 250hFE |
| Operating Temperature Max | 150°C |
| Continuous Collector Current | 5A |
| Collector Emitter Voltage Max | 40V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2354515/)

**2STN2540** 

Low voltage fast-switching PNP power bipolar transistor 

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## **Features** 

- Very low collector-emitter saturation voltage 

- High current gain characteristic 

- Fast switching speed 

- Surface mounting device in medium power SOT-223 package 

## **Applications** 

- Emergency lighting 

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


- LED 

- CCFL drivers (back lighting) 

- Voltage regulation 

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

- Relay driver 

## **Description** 

The device is a  PNP transistor manufactured using new “PB-HCD” (Power Bipolar High Current Density) technology. The resulting transistor shows exceptional high gain performances coupled with very low saturation voltage. 

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**Table 1.** 

**Device summary** 

|**Order code**|**Marking**|**Package**|**Packaging**|
|---|---|---|---|
|2STN2540|N2540|SOT-223|Tape and reel|



_www.st.com_ 

1/9 

January 2008 

Rev 3 

**2STN2540** 

**Electrical ratings** 

## **1 Electrical ratings** 

## **Table 2. Absolute maximum rating** 

|**Table 2.**|**Absolute maximum rating**|||
|---|---|---|---|
|**Symbol**|**Parameter**|**Value**|**Unit**|
|VCBO|Collector-base voltage (IE= 0)|-40|V|
|VCEO|Collector-emitter voltage (IB= 0)|-40|V|
|VEBO|Emitter-base voltage (IC= 0)|-6|V|
|IC|Collector current|-5|A|
|ICM|Collector peak current (tP< 5ms)|-10|A|
|IBM|Base peak current (tP< 5ms)|-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** 

|**Symbol**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|
|Rthj-amb<br>(1)|Thermal resistance junction-amb__max|78|°C/W|



1. Device mounted on PCB area of 1cm[2] 

2/9 

**2STN2540** 

**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= -30 V|||-0.1|µA|
|IEBO|Emitter cut-off current<br>(IC=0)|VEB= -5 V|||-0.1|µA|
|VCE(sat)<br>(1)|Collector-emitter<br>saturation voltage|IC= -0.5 A    IB= -5 mA<br>IC= -1 A       IB= -10 mA<br>IC= -2 A       IB= -200 mA<br>IC= -5 A       IB= -500 mA||-80<br>-120<br>-140<br>-350|-120<br>-180<br>-200<br>-450|mV<br>mV<br>mV<br>mV|
|VBE(sat)<br>(1)|Base-emitter saturation<br>voltage|IC= -5 A       IB= -500 mA|||-1.3|V|
|VBE(on)<br>(1)|Base-emitter on voltage|VCE= -2 V    IC= -2 A|||-1.25|V|
|hFE<br>(1)|DC current gain|IC= -0.5 A    VCE= -2 V<br>IC= -1 A       VCE= -2 V<br>IC= -2 A       VCE= -2 V<br>IC= -5 A       VCE= -2 V|250<br>200<br>150<br>50||||
|CCBO|Collector-base<br>capacitance|IE= 0             VCB= -10 V<br>f = 1 MHz||80||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<br>Tp= 30 µs||75<br>426<br>62||ns<br>ns<br>ns|



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

3/9 

**2STN2540** 

**Electrical characteristics** 

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

**Figure 2. Output characteristics Figure 3. DC current gain** 

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

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

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

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**Figure 7. Resistive load switching times** 

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4/9 

**2STN2540** 

**Electrical characteristics** 

## **Figure 8. Resistive load switching Figure 9. Capacitance times** 

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## **2.2 Test circuit** 

**Figure 10. Resistive load switching test circuit** 

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1) Fast electronic switch<br>2) Non-inductive resistor<br>**----- End of picture text -----**<br>


5/9 

**2STN2540** 

**Package mechanical data** 

## **3 Package mechanical data** 

In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 

6/9 

**2STN2540** 

**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>


7/9 

**2STN2540** 

**Revision history** 

## **4 Revision history** 

## **Table 5. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|23-Oct-2003|1|Initial release|
|03-Nov-2006|2|Added new graphics: fig.2, fig. 7, fig.8, fig.9.|
|14-Jan-2008|3|Document status promoted from preliminary data to datasheet.|



8/9 

**2STN2540** 

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9/9 



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