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MMBTA42 - onsemi

Description: NPN Bipolar Small Signal Transistor

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Symbol
MMBTA42 - onsemi - PCB symbol
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PCB Footprints
MMBTA42 - onsemi PCB footprint - SOT23 (3-Pin) - SOT23 (3-Pin) - SOT-23
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MMBTA42 Details

  • Manufacturer Part Number:

    MMBTA42

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOT-23-3

  • Package Description:

    SOT-23, 3 PIN

  • Manufacturer Package Code:

    318BM

  • ECCN Code:

    EAR99

  • Factory Lead Time:

    4 Weeks

  • Manufacturer:

    onsemi

  • YTEOL:

    0

  • Collector Current-Max (IC):

    0.5 A

  • Collector-Base Capacitance-Max:

    3 pF

  • Collector-Emitter Voltage-Max:

    300 V

  • Configuration:

    SINGLE

  • DC Current Gain-Min (hFE):

    40

  • JEDEC-95 Code:

    TO-236AB

  • JESD-30 Code:

    R-PDSO-G3

  • JESD-609 Code:

    e3

  • Moisture Sensitivity Level:

    1

  • Number of Elements:

    1

  • Number of Terminals:

    3

  • Operating Temperature-Max:

    150 °C

  • Operating Temperature-Min:

    -55 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Polarity/Channel Type:

    NPN

  • Power Dissipation-Max (Abs):

    0.225 W

  • Surface Mount:

    YES

  • Terminal Finish:

    MATTE TIN

  • Terminal Form:

    GULL WING

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Transistor Application:

    AMPLIFIER

  • Transistor Element Material:

    SILICON

  • Transition Frequency-Nom (fT):

    50 MHz

  • VCEsat-Max:

    0.5 V

MMBTA42 Frequently Asked Questions (FAQs)

  • The SOA for the MMBTA42 is not explicitly stated in the datasheet, but it can be estimated based on the device's thermal resistance and maximum junction temperature. A safe operating area can be assumed to be around 1.5 A and 20 V.
  • To ensure linear operation, the MMBTA42 should be biased in the active region, which is typically between 1-5 V base-emitter voltage (Vbe) and 1-10 mA collector current (Ic). The exact bias point depends on the specific application and desired performance.
  • For optimal thermal performance, it is recommended to use a PCB layout with a large copper area for heat dissipation, and to ensure good thermal conductivity between the device and the PCB. A thermal pad or heat sink may also be necessary for high-power applications.
  • Yes, the MMBTA42 can be used in switching applications, but it is not optimized for high-frequency switching. The device's switching speed is limited by its transition frequency (ft) of around 100 MHz. Additionally, the device's power dissipation and thermal management become critical in switching applications.
  • The MMBTA42 is rated for operation up to 150°C junction temperature. At high temperatures, the device's current gain (β) and voltage ratings may degrade. It is essential to consider the device's thermal characteristics and ensure proper thermal management in high-temperature applications.

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MMBTA42 Overview

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