BD135-16

Bipolar (BJT) Single Transistor, NPN, 45 V, 1.5 A, 12.5 W, SOT-32, Through Hole

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Manufacturer: STMICROELECTRONICS
Product type:
Transistor Polarity:NPN; Collector Emitter Voltage V(br)ceo:45V; Transition Frequency ft:-; Power Dissipation Pd:12.5W; DC Collector Current:1.5A; DC Current Gain hFE:40hFE; Transistor Case Style
MSL: -
SVHC: No SVHC (25-Jun-2025)
No. of Pins: 3Pins
Product Range: -
Qualification: -
Power Dissipation: 12.5W
Transistor Mounting: Through Hole
Transistor Polarity: NPN
Transition Frequency: -
Transistor Case Style: SOT-32
DC Current Gain hFE Min: 40hFE
Operating Temperature Max: 150°C
Continuous Collector Current: 1.5A
Collector Emitter Voltage Max: 45V

Delivery and price
Units per pack	5000
Price	0.149 €
Current stock	1000+
Lead time	30 days

Datasheet

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## **BD135 - BD136 BD139 - BD140** 

## Complementary low voltage transistor 

## **Features** 

- Products are pre-selected in DC current gain 

## **Application** 

■ General purpose 

## **Description** 

These epitaxial planar transistors are mounted in the SOT-32 plastic package. They are designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits. The NPN types are the BD135 and BD139, and the complementary PNP types are the BD136 and BD140. 

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1<br>3 [2]<br>SOT-32<br>**----- End of picture text -----**<br>


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

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


**Table 1. Device summary** 

|**Order codes**|**Marking**|**Package**|**Packaging**|
|---|---|---|---|
|BD135|BD135|SOT-32|Tube|
|BD135-16|BD135-16|||
|BD136|BD136|||
|BD136-16|BD136-16|||
|BD139|BD139|||
|BD139-10|BD139-10|||
|BD139-16|BD139-16|||
|BD140|BD140|||
|BD140-10|BD140-10|||
|BD140-16|BD140-16|||



Rev 5 

_www.st.com_ 

1/9 

May 2008 

**Contents** 

**BD135 - BD136 - BD139 - BD140** 

|**Contents**|**Contents**|
|---|---|
|**1**|**Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3**|
|**2**|**Electrical characteristics  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4**|
||2.1<br>Electrical characteristics (curves)   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5|
|**3**|**Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6**|
|**4**|**Revision history  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8**|



2/9 

**Electrical ratings** 

**BD135 - BD136 - BD139 - BD140** 

## **1 Electrical ratings** 

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

|**Table 2.**|**Absolute maximum ratings**||||||
|---|---|---|---|---|---|---|
|**Symbol**|**Parameter**|**Value**||||**Unit**|
|||**NPN**||**PNP**|||
|||**BD135 **|**BD139 **|**BD136 **|**BD140**||
|VCBO|Collector-base voltage (IE= 0)|45|80|-45|-80|V|
|VCEO|Collector-emitter voltage (IB= 0)|45|80|-45|-80|V|
|VEBO|Emitter-base voltage (IC= 0)|5||-5||V|
|IC|Collector current|1.5||-1.5||A|
|ICM|Collector peak current|3||-3||A|
|IB|Base current|0.5||-0.5||A|
|PTOT|Total dissipation at Tc≤25 °C|12.5||||W|
|PTOT|Total dissipation at Tamb ≤25 °C|1.25||||W|
|Tstg|Storage temperature|-65 to 150||||°C|
|Tj|Max. operating junction temperature|150||||°C|



|**Table 3.**<br>**Thermal data**|**Table 3.**<br>**Thermal data**|**Table 3.**<br>**Thermal data**|**Table 3.**<br>**Thermal data**|
|---|---|---|---|
|**Symbol**|**Parameter**|**Max value**|**Unit**|
|Rthj-case|Thermal resistance junction-case|10|°C/W|
|Rthj-amb|Thermal resistance junction-ambient|100|°C/W|



3/9 

**Electrical characteristics** 

**BD135 - BD136 - BD139 - BD140** 

## **2 Electrical characteristics** 

(Tcase= 25 °C unless otherwise specified) 

## **Table 4. On/off states** 

|**Symbol**|**Parameter**|**Polarity**|**Test conditions**|**Value**|**Value**|**Value**|**Unit**|
|---|---|---|---|---|---|---|---|
|||||**Min.**|**Typ.**|**Max.**||
|ICBO|Collector cut-off<br>current (IE=0)|NPN|VCB= 30 V<br>VCB= 30 V, TC= 125 °C|||0.1<br>10|µA<br>µA|
|||PNP|VCB= -30 V<br>VCB= -30 V, TC= 125 °C|||-0.1<br>-10|µA<br>µA|
|IEBO|Emitter cut-off current<br>(IC=0)|NPN|VEB= 5 V|||10|µA|
|||PNP|VEB= -5 V|||-10|µA|
|VCEO(sus)<br>(1)|Collector-emitter<br>sustaining voltage<br>(IB=0)|NPN|IC= 30 mA<br>BD135<br>BD139|45<br>80|||V<br>V|
|||PNP|IC= -30 mA<br>BD136<br>BD140|-45<br>-80|||V<br>V|
|VCE(sat)<br>(1)|Collector-emitter<br>saturation voltage|NPN|IC= 0.5 A, IB= 0.05 A|||0.5|V|
|||PNP|IC= -0.5 A, IB= -0.05 A|||-0.5|V|
|VBE<br>(1)|Base-emitter voltage|NPN|IC= 0.5 A, VCE= 2 V|||1|V|
|||PNP|IC= -0.5 A, VCE= -2 V|||-1|V|
|hFE<br>(1)|DC current gain|NPN|IC= 5 mA, VCE= 2 V<br>IC= 150 mA, VCE= 2 V<br>IC= 0.5 A, VCE= 2 V|25<br>40<br>25||250||
|||PNP|IC= -5 mA, VCE= -2 V<br>IC= -150 mA, VCE= -2 V<br>IC= -0.5 A, VCE= -2 V|25<br>40<br>25||250||
|hFE<br>(1)|hFEgroups|NPN|IC= 150 mA, VCE= 2 V<br>BD139-10<br>BD135-16/BD139-16|63<br>100||160<br>250||
|||PNP|IC= -150 mA, VCE= -2 V<br>BD140-10<br>BD136-16/BD140-16|63<br>100||160<br>250||



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

4/9 

**Electrical characteristics** 

**BD135 - BD136 - BD139 - BD140** 

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

## **Figure 2. Safe operating area Figure 3. Derating** 

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5/9 

**Package mechanical data** 

**BD135 - BD136 - BD139 - BD140** 

## **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 

**Package mechanical data** 

**BD135 - BD136 - BD139 - BD140** 

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7/9 

**Revision history** 

**BD135 - BD136 - BD139 - BD140** 

## **4 Revision history** 

**Table 5.** 

**Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|16-Sep-2001|4||
|22-May-2008|5|Mechanical data has been updated.|



8/9 

**BD135 - BD136 - BD139 - BD140** 

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9/9

Updated at April 27, 2026

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