BC549 BC549 is an NPN bipolar junction transistor from On Semiconductor, designed for general purpose amplification and switching. It features a 30V collector-emitter voltage, 100mA collector current, and 500mW power dissipation in a TO-92-3 package.
Mfr Part #:

BC549

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
BC549 is an NPN bipolar junction transistor from On Semiconductor, designed for general purpose amplification and switching. It features a 30V collector-emitter voltage, 100mA collector current, and 500mW power dissipation in a TO-92-3 package.
Total Stock: 6,102 pcs

BC549 Available from 2 distributors

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4,500 pcs
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1,602 pcs
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BC549 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Frequency
Industrial Grade
Lead Spacing
Lead Style
Medical Grade
Military Grade
Mounting Type
Operating Temperature
Power
SVHC Present
Supplier Device Package
Tape & Reel
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage

BC549 Description

Short technical summary and product information.

The BC549 is an NPN bipolar junction transistor manufactured by ON Semiconductor. It is housed in a through-hole TO-92-3 package (TO-226-3, TO-226AA) with a supplier device package of TO-92-3. This transistor is designed for general purpose amplification and switching applications in low-power circuits.

 

Key electrical specifications include a maximum collector-emitter voltage of 30V, a maximum collector current of 100mA, and a power dissipation of 500mW. The DC current gain (hFE) is at least 110 at 2mA collector current and 5V collector-emitter voltage. The saturation voltage (Vce) is 600mV maximum at 5mA base current and 100mA collector current. The transition frequency is 300MHz, making it suitable for low-frequency signal processing.

 

The operating junction temperature is rated up to 150°C. The transistor is through-hole mounted, fitting standard TO-92 footprints. Compliance data indicates RoHS3, REACH unaffected, and MSL level 1 (unlimited), though these are unverified.

BC549 Quick Information

Product Type: Bipolar Junction Transistor (BJT)
Canonical Name: BC549 NPN Bipolar Junction Transistor
Subcategory: NPN Single Transistor

BC549 Compliance

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

BC549 Features

  • NPN bipolar junction transistor.
  • 30V collector-emitter breakdown voltage.
  • 100mA maximum collector current.
  • 500mW power dissipation.
  • Transition frequency of 300MHz.

BC549 Applications

  • General purpose amplification and switching.
  • Signal amplification in low-frequency circuits.
  • Driver for small loads in low-power designs.

BC549 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage of the BC549?

The maximum collector-emitter voltage (Vce) is 30V.

What package is the BC549 available in?

The BC549 is available in a TO-226-3, TO-92-3 (TO-226AA) package, with a supplier device package of TO-92-3.

What is the operating temperature range of the BC549?

The operating junction temperature is rated up to 150°C (TJ).

Is the BC549 RoHS compliant?

The BC549 is listed as RoHS3 compliant, though this status is unverified and has low confidence.

What is the maximum collector current of the BC549?

The maximum collector current is 100 mA.

What is the DC current gain (hFE) of the BC549?

The minimum DC current gain (hFE) is 110 at Ic=2mA and Vce=5V.

What is the transition frequency of the BC549?

The transition frequency is 300 MHz.

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