BD909 The ST BD909 is an NPN power transistor designed for power linear and switching applications. It features a TO-220 package and complementary PNP types BD910 and BD912.
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BD909

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The ST BD909 is an NPN power transistor designed for power linear and switching applications. It features a TO-220 package and complementary PNP types BD910 and BD912.
✓ Total Stock: 1,225 pcs
$ Price Range: $0.99

BD909 Available from 1 distributor

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✓ Non-Authorised
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BD909 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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Manufacturer Name
Storage Temperature

BD909 Description

Short technical summary and product information.

The BD909 is a silicon Epitaxial-Base NPN power transistor manufactured by STMicroelectronics, housed in a standard Jedec TO-220 plastic package. It is intended for use in power linear and switching applications. The complementary PNP types are BD910 and BD912.

 

Key electrical characteristics include a maximum Collector-Emitter Voltage (VCEO) of 80V and a maximum Collector Current (IC) of 15A. The device offers a maximum Total Power Dissipation (Ptot) of 90W at 25°C case temperature and a Thermal Resistance Junction-case (Rthj-case) of 1.4°C/W.

 

Additional specifications include a maximum Collector-Base Voltage (VCBO) of 80V and a maximum Emitter-Base Voltage (VEBO) of 5V. The DC Current Gain (hFE) varies with collector current, ranging from a minimum of 40 at 0.5A to 5 at 10A, with a typical value of 250 at 0.5A and 150 at 5A. The transition frequency (fT) is typically 3MHz at 0.5A and 4V.

 

The transistor operates within a storage temperature range of -65 to 150°C and a maximum operating junction temperature of 150°C. The TO-220 package is suitable for through-hole mounting.

BD909 Quick Information

Product Type: NPN Power Transistor
Canonical Name: BD909 NPN Power Transistor
Subcategory: NPN

BD909 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BD909 Estimated Pricing

Qty Low High
1+ $0.99 $0.99

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

BD909 Features

  • NPN power transistor for linear and switching.
  • Maximum VCEO of 80V.
  • Maximum collector current of 15A.
  • TO-220 package for through-hole mounting.
  • Low thermal resistance of 1.4°C/W.

BD909 Applications

  • Suitable for power linear applications.
  • Designed for power switching applications.
  • Complementary PNP types available.
  • General purpose power amplification.

BD909 FAQs

5 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage for the BD909?

The maximum collector-emitter voltage (VCEO) for the BD909 is 80V.

What is the maximum collector current of the BD909 transistor?

The BD909 transistor has a maximum collector current (IC) of 15A.

What package type is the BD909 transistor supplied in?

The BD909 transistor is supplied in a TO-220 package.

What is the typical DC current gain (hFE) of the BD909 at 0.5A?

The typical DC current gain (hFE) of the BD909 at 0.5A collector current and 4V VCE is 250.

What is the transition frequency of the BD909?

The transition frequency (fT) of the BD909 is typically 3MHz at 0.5A collector current and 4V VCE.

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