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BC640 - onsemi

Description: Obsolete - PNP Bipolar Transistor

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Symbol
BC640 - onsemi - PCB symbol
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PCB Footprints
BC640 - onsemi PCB footprint - Other - Other - TO127P254X732-3
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3D Models
BC640 - onsemi - 3D model - Other - TO127P254X732-3
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BC640 Details

  • Manufacturer Part Number:

    BC640

  • Brand Name:

    onsemi

  • Pbfree Code:

    No

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    TO-92

  • Package Description:

    CASE 29-11, TO-226, 3 PIN

  • Pin Count:

    3

  • Manufacturer Package Code:

    29-11

  • ECCN Code:

    EAR99

  • Manufacturer:

    onsemi

  • YTEOL:

    0

  • Collector Current-Max (IC):

    0.5 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:

    PNP

  • 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):

    150 MHz

BC640 Frequently Asked Questions (FAQs)

  • The maximum SOA for the BC640 is not explicitly stated in the datasheet, but it's generally recommended to operate the transistor within the boundaries of the maximum voltage and current ratings to ensure reliability and prevent damage.
  • The base resistor value depends on the specific application and the desired current gain. A general rule of thumb is to choose a base resistor value that limits the base current to 1/10th of the collector current. You can use online calculators or consult application notes for more guidance.
  • The thermal resistance of the BC640 is not explicitly stated in the datasheet. However, you can estimate it using the package thermal resistance values provided in the datasheet and the device's power dissipation. Typically, the thermal resistance of a TO-92 package is around 200-250°C/W.
  • Yes, the BC640 can be used as a switch, but it's essential to ensure that the transistor is fully saturated (Vce(sat) < 0.5V) to minimize power dissipation and heat generation. You may need to add a base resistor and a collector resistor to ensure proper switching operation.
  • The BC640 is a general-purpose transistor, and its frequency response is not explicitly stated in the datasheet. However, it's generally suitable for low-frequency applications up to a few hundred kHz. For higher-frequency applications, you may need to consider a different transistor or a specialized RF transistor.

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BC640 Overview

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BC640 Alternates

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Image Part Number Model
Part Image BC640ZL1G Rochester Electronics LLC

500mA, 80V, PNP, Si, SMALL SIGNAL TRANSISTOR, TO-92, LEAD FREE, CASE 29-11, TO-226, 3 PIN
Part Image BC640 Fairchild Semiconductor Corporation

Small Signal Bipolar Transistor, 1A I(C), 80V V(BR)CEO, 1-Element, PNP, Silicon, TO-92
Part Image BC640ZL1 onsemi

Small Signal Bipolar Transistor, 0.5A I(C), 80V V(BR)CEO, 1-Element, PNP, Silicon, TO-92
Part Image BC640 Vishay Semiconductors

Small Signal Bipolar Transistor
Part Image BC640AMO NXP Semiconductors

Small Signal Bipolar Transistor, 1A I(C), 80V V(BR)CEO, 1-Element, PNP, Silicon, TO-92
For a full list of alternate parts for BC640, check out Findchips.com