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TIP121 - STMicroelectronics

Description: TIP121, Darlington Transistor, NPN 5 A 80 V HFE:1000, 3-Pin, TO-220

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TIP121 - STMicroelectronics - PCB symbol
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PCB Footprints
TIP121 - STMicroelectronics PCB footprint - Transistor Outline, Vertical - Transistor Outline, Vertical - TO-220 TYPE A-ren1
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3D Models
TIP121 - STMicroelectronics - 3D model - Transistor Outline, Vertical - TO-220 TYPE A-ren1
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TIP121 Details

  • Manufacturer Part Number:

    TIP121

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    TO-220AB

  • Pin Count:

    3

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8541.29.00.95

  • Factory Lead Time:

    14 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    9

  • Collector Current-Max (IC):

    5 A

  • Collector-Emitter Voltage-Max:

    80 V

  • Configuration:

    DARLINGTON WITH BUILT-IN DIODE AND RESISTOR

  • DC Current Gain-Min (hFE):

    1000

  • JEDEC-95 Code:

    TO-220AB

  • JESD-30 Code:

    R-PSFM-T3

  • JESD-609 Code:

    e3

  • Number of Elements:

    1

  • Number of Terminals:

    3

  • Operating Temperature-Max:

    150 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Shape:

    RECTANGULAR

  • Package Style:

    FLANGE MOUNT

  • Peak Reflow Temperature (Cel):

    NOT SPECIFIED

  • Polarity/Channel Type:

    NPN

  • Power Dissipation Ambient-Max:

    65 W

  • Power Dissipation-Max (Abs):

    65 W

  • Qualification Status:

    Not Qualified

  • Surface Mount:

    NO

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Position:

    SINGLE

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

    NOT SPECIFIED

  • Transistor Application:

    SWITCHING

  • Transistor Element Material:

    SILICON

  • VCEsat-Max:

    4 V

TIP121 Frequently Asked Questions (FAQs)

  • The maximum collector current for each Darlington pair is 500 mA. However, it's essential to ensure that the total current drawn from the device does not exceed 1 A to prevent overheating.
  • The base resistor value can be calculated using the formula: Rb = (Vcc - Vbe) / (Ic / β), where Vcc is the supply voltage, Vbe is the base-emitter voltage, Ic is the collector current, and β is the current gain. A general rule of thumb is to use a base resistor value between 1 kΩ and 10 kΩ.
  • The maximum voltage that can be applied to the TIP121 is 80 V. Exceeding this voltage may damage the device.
  • While the TIP121 can be used as a switch, it's not suitable for high-frequency applications due to its relatively slow switching times (typically around 10 μs). For high-frequency applications, consider using a faster switching device, such as a MOSFET or a high-frequency transistor.
  • To protect the TIP121 from back-EMF when driving inductive loads, use a flyback diode (also known as a freewheeling diode) in parallel with the inductive load. This diode allows the current to continue flowing when the transistor is turned off, preventing voltage spikes that could damage the device.

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TIP121 Overview

Use the download button to access the TIP121 schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like TIP12, or try a keyword search, such as Power Bipolar Transistors

About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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TIP121 Alternates

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For a full list of alternate parts for TIP121, check out Findchips.com