BD135 The BD135 is an NPN bipolar junction transistor from STMicroelectronics with a 45V collector-emitter voltage rating and 1.5A continuous collector current. It is housed in a TO-225AA (SOT-32-3) through-hole package.
Mfr Part #:

BD135

Available from 3 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The BD135 is an NPN bipolar junction transistor from STMicroelectronics with a 45V collector-emitter voltage rating and 1.5A continuous collector current. It is housed in a TO-225AA (SOT-32-3) through-hole package.
Total Stock: 10,497 pcs
$ Price Range: $0.16 - $0.89

BD135 Available from 3 distributors

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6,650 pcs
6650 pcs On Request 1 On Request On Request On Request On Request On Request
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3,770 pcs
3770 pcs On Request 1 On Request On Request On Request On Request On Request
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77 pcs
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BD135 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Base Current (IB)
Base-Emitter On Voltage (VBE(on)) @ IC=0.5A, VCE=2V
Collector-Base Voltage (VCBO)
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
DC Current Gain (hFE) (Minimum @ IC=0.005 A, VCE=2 V)
DC Current Gain (hFE) (Minimum @ Ic=-0.5 A, Vce=-2 V)
Emitter-Base Voltage (VEBO)
Halogen Free
Mounting Type
Operating Junction Temperature Range
Operating Temperature
Power
Power Dissipation (PD) (Maximum @ TC=25 °C)
Supplier Device Package
Tape & Reel
Termination Style
Thermal Resistance Junction to Ambient (RθJA)
Thermal Resistance Junction-to-Case (RθJC)
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage

BD135 Description

Short technical summary and product information.

The BD135 is a silicon NPN medium-power transistor designed for general-purpose amplifier and switching applications. It features a collector-emitter voltage (VCEO) of 45V and a continuous collector current rating of 1.5A, making it suitable for moderate power circuits.

 

With a maximum power dissipation of 12.5W at case temperature 25°C and 1.25W at ambient temperature, the device offers good thermal performance. The DC current gain (hFE) ranges from 40 to 250 at 150mA and 2V, providing consistent amplification characteristics.

 

The transistor is available in a TO-225AA (also known as SOT-32-3) through-hole package, which facilitates easy mounting on PCBs. It is designed for use in audio amplifiers, driver stages, and other linear applications requiring complementary NPN/PNP pairs.

BD135 Quick Information

Product Type: Bipolar Junction Transistor (BJT)
Canonical Name: BD135 NPN Bipolar Transistor
Subcategory: Medium Power Transistor

BD135 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Pb-Free

BD135 Estimated Pricing

Qty Low High
1+ $0.89 $0.89
10+ $0.73 $0.73
100+ $0.45 $0.45
500+ $0.31 $0.31
1,000+ $0.26 $0.26
2,500+ $0.24 $0.24
6,000+ $0.20 $0.20
12,000+ $0.19 $0.19
30,000+ $0.16 $0.16

Estimated market price range - modelled values for guidance only, not live distributor offers.

BD135 Features

  • NPN silicon transistor for medium power.
  • 45V collector-emitter voltage rating.
  • 1.5A continuous collector current.
  • 12.5W power dissipation at case temperature.
  • TO-225AA through-hole package.

BD135 Applications

  • Used in audio amplifier output stages.
  • Suitable for driver circuits in power supplies.
  • Ideal for general-purpose switching applications.
  • Works as complementary pair with BD136.

BD135 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the collector-emitter voltage rating of the BD135?

The BD135 has a minimum collector-emitter voltage (VCEO) of 45V.

What is the maximum collector current for the BD135?

The maximum continuous collector current (IC) is 1.5A.

What package does the BD135 come in?

The BD135 is available in a TO-225AA (also known as SOT-32-3) through-hole package.

What is the operating temperature range of the BD135?

The operating junction temperature range is -55°C to +150°C.

Is the BD135 RoHS compliant?

The BD135 is listed as RoHS3 compliant, but this information is unverified and should be confirmed with the manufacturer.

What is the DC current gain (hFE) of the BD135?

The DC current gain (hFE) ranges from 40 to 250 at IC=150mA and VCE=2V.

What is the saturation voltage of the BD135?

The collector-emitter saturation voltage (VCE(sat)) is 500mV maximum at IC=500mA and IB=50mA.

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