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BC639 - onsemi

Description: Obsolete - High Current NPN Bipolar Transistor

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Symbol
BC639 - onsemi - PCB symbol
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PCB Footprints
BC639 - onsemi PCB footprint - Other - Other - TO254P508X787-3
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3D Models
BC639 - onsemi - 3D model - Other - TO254P508X787-3
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BC639 Details

  • Manufacturer Part Number:

    BC639

  • Brand Name:

    onsemi

  • Pbfree Code:

    No

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    TO-92

  • Package Description:

    TO-226, 3 PIN

  • Pin Count:

    3

  • Manufacturer Package Code:

    29-11

  • ECCN Code:

    EAR99

  • Manufacturer:

    onsemi

  • YTEOL:

    0

  • Collector Current-Max (IC):

    1 A

  • Collector-Emitter Voltage-Max:

    80 V

  • Configuration:

    SINGLE

  • DC Current Gain-Min (hFE):

    40

  • JEDEC-95 Code:

    TO-92

  • JESD-30 Code:

    O-PBCY-T3

  • JESD-609 Code:

    e0

  • Number of Elements:

    1

  • Number of Terminals:

    3

  • Operating Temperature-Max:

    150 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Shape:

    ROUND

  • Package Style:

    CYLINDRICAL

  • Peak Reflow Temperature (Cel):

    235

  • Polarity/Channel Type:

    NPN

  • Power Dissipation-Max (Abs):

    0.8 W

  • Qualification Status:

    Not Qualified

  • Surface Mount:

    NO

  • Terminal Finish:

    TIN LEAD

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Position:

    BOTTOM

  • Transistor Element Material:

    SILICON

  • Transition Frequency-Nom (fT):

    200 MHz

BC639 Frequently Asked Questions (FAQs)

  • The maximum safe operating temperature for the BC639 is 150°C, but it's recommended to operate it at a maximum of 125°C for reliable performance.
  • Yes, the BC639 can be used as a switch, but it's not recommended due to its relatively low current gain (hFE) and high saturation voltage. It's better suited for amplifier applications.
  • Choose resistor values that provide a base current of around 1-5% of the collector current. A good starting point is to use a base resistor (Rb) of 1-2 kΩ and an emitter resistor (Re) of 100-220 Ω.
  • The minimum Vce required for saturation is around 0.5-1.0 V, but this can vary depending on the specific application and operating conditions.
  • The BC639 is not suitable for high-frequency applications (>100 kHz) due to its relatively low transition frequency (ft) of around 100-200 MHz.

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BC639 Overview

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BC639 Alternates

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Image Part Number Model
Part Image BC639ZL1G onsemi

Small Signal Bipolar Transistor, 1A I(C), 80V V(BR)CEO, 1-Element, NPN, Silicon, TO-226
Part Image BC639ZL1 onsemi

Small Signal Bipolar Transistor, 1A I(C), 80V V(BR)CEO, 1-Element, NPN, Silicon, TO-92
Part Image BC639RL1 onsemi

Small Signal Bipolar Transistor, 1A I(C), 80V V(BR)CEO, 1-Element, NPN, Silicon, TO-92
Part Image BC639RLRP Motorola Semiconductor Products

Small Signal Bipolar Transistor, 0.5A I(C), 80V V(BR)CEO, 1-Element, NPN, Silicon, TO-92
Part Image BC639RLRE onsemi

500mA, 80V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, TO-226AA, 3 PIN
For a full list of alternate parts for BC639, check out Findchips.com