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BF959 - onsemi

Description: Obsolete - VHF Transistor

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Symbol
BF959 - onsemi - PCB symbol
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PCB Footprints
BF959 - onsemi PCB footprint - Other - Other - TO−92 (TO−226) CASE 29−11 ISSUE AM
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3D Models
BF959 - onsemi - 3D model - Other - TO−92 (TO−226) CASE 29−11 ISSUE AM
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BF959 Details

  • Manufacturer Part Number:

    BF959

  • Brand Name:

    onsemi

  • Pbfree Code:

    No

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    TO-92 (TO-226) 5.33mm Body Height

  • Pin Count:

    3

  • Manufacturer Package Code:

    29-11

  • ECCN Code:

    EAR99

  • Manufacturer:

    onsemi

  • YTEOL:

    0

  • Collector Current-Max (IC):

    0.1 A

  • Collector-Emitter Voltage-Max:

    20 V

  • Configuration:

    SINGLE

  • DC Current Gain-Min (hFE):

    40

  • Highest Frequency Band:

    VERY HIGH FREQUENCY BAND

  • 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):

    0.625 W

  • Qualification Status:

    Not Qualified

  • Surface Mount:

    NO

  • Terminal Finish:

    TIN LEAD

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Position:

    BOTTOM

  • Transistor Application:

    AMPLIFIER

  • Transistor Element Material:

    SILICON

  • Transition Frequency-Nom (fT):

    700 MHz

BF959 Frequently Asked Questions (FAQs)

  • A recommended PCB layout for optimal thermal performance would be to use a large copper area under the transistor, connected to a solid ground plane, and to use thermal vias to dissipate heat. Additionally, keeping the transistor away from other heat sources and using a thermal interface material can help.
  • To ensure stable operation in high-frequency applications, it's essential to use a proper decoupling network, consisting of capacitors and resistors, to prevent oscillations. Additionally, using a low-inductance layout, minimizing lead lengths, and using a common ground plane can help.
  • The maximum safe operating area (SOA) for the BF959 is not explicitly stated in the datasheet. However, it's recommended to follow the guidelines provided in the onsemi application note AND8039/D, which provides SOA curves for similar devices.
  • Yes, the BF959 can be used in a push-pull configuration. However, it's essential to ensure that the transistors are properly matched, and the circuit is designed to prevent cross-conduction and minimize dead-time.
  • The recommended drive circuit for the BF959 typically consists of a low-impedance driver stage, such as a emitter-follower or a totem-pole configuration, to provide a fast rise and fall time. The drive circuit should also be designed to minimize ringing and oscillations.

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BF959 Overview

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BF959 Alternates

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For a full list of alternate parts for BF959, check out Findchips.com