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TIP120/121/122

NPN Darlington Power Transistor

The TIP120/121/122 is a npn darlington power transistor from STMicroelectronics. View the full TIP120/121/122 datasheet below including key specifications.

Official TIP120/121/122 datasheet (PDF) — the source this page was extracted from.

Manufacturer

STMicroelectronics

Category

BJTs

Package

TO-220

TIP120/121/122 Key Specifications

ParameterValue
Base Current (IB)0.1A
Storage Temperature-65°C to 150°C
DC Current Gain (HFE)min 1000 at IC=0.5A/3A, VCE=3V
Collector Current (IC)5A
Emitter-Base Voltage (VEBO)5V
Collector Peak Current (ICM)8A
Collector-Base Voltage (VCBO)60V (TIP120) / 80V (TIP121) / 100V (TIP122)
Base-Emitter Voltage (VBE(On))max 2.5V at IC=3A, VCE=3V
Collector-Emitter Voltage (VCEO)60V (TIP120) / 80V (TIP121) / 100V (TIP122)
Thermal Resistance Junction-Case1.92°C/W max
Max Operating Junction Temperature150°C
Total Dissipation (Tamb ≤ 25°C)2W
Thermal Resistance Junction-Ambient62.5°C/W max
Total Dissipation (Tcase ≤ 25°C)65W
Collector-Emitter Saturation Voltage (VCE(Sat))max 2V at IC=3A, IB=12mA; max 4V at IC=5A, IB=20mA

TIP120/121/122 Overview

Part: TIP120/121/122 TIP125/126/127 — STMicroelectronics

Type: Complementary Silicon Power Darlington Transistors

Description: Silicon Epitaxial-Base NPN and complementary PNP power transistors in monolithic Darlington configuration, intended for use in power linear and switching applications.

Operating Conditions:

  • Operating junction temperature: Up to 150 °C

Absolute Maximum Ratings:

  • Collector-Base Voltage (V_CBO): 100 V (for TIP122/127)
  • Collector-Emitter Voltage (V_CEO): 100 V (for TIP122/127)
  • Collector Current (I_C): 5 A
  • Collector Peak Current (I_CM): 8 A
  • Total Dissipation (P_tot): 65 W (at T_case ≤ 25 °C)
  • Storage temperature: -65 to 150 °C

Key Specs:

  • Collector-Emitter Sustaining Voltage (V_CEO(sus)): 100 V (min, for TIP122/127 at I_C = 30 mA)
  • Collector-Emitter Saturation Voltage (V_CE(sat)): 2 V (max, at I_C = 3 A, I_B = 12 mA)
  • Base-Emitter Voltage (V_BE(on)): 2.5 V (max, at I_C = 3 A, V_CE = 3 V)
  • DC Current Gain (h_FE): 1000 (min, at I_C = 0.5 A, V_CE = 3 V)
  • DC Current Gain (h_FE): 1000 (min, at I_C = 3 A, V_CE = 3 V)
  • Collector Cut-off Current (I_CEO): 0.5 mA (max, for TIP122/127 at V_CE = 50 V)
  • Thermal Resistance Junction-case (R_thj-case): 1.92 °C/W (max)

Features:

  • NPN and complementary PNP types (TIP120/121/122 and TIP125/126/127)
  • Monolithic Darlington configuration
  • Silicon Epitaxial-Base

Applications:

  • Power linear applications
  • Switching applications

Package:

  • TO-220 plastic package

TIP120/121/122 Thermal Information

R thj-case R thj-ambThermal Resistance Junction-case Thermal Resistance Junction-ambientMax Max1.92 62.5o C/W o C/W

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
TIP120STMicroelectronicsTO-220
TIP120/125STMicroelectronicsTO-220

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  • 2N2222A – onsemi, NPN High Speed Switching Transistor
  • 2N3906 – onsemi, PNP Silicon General Purpose Transistor
  • 2N4921G – onsemi, NPN Medium-Power Silicon Transistor
  • 2N4922G – onsemi, Medium-Power NPN Silicon Transistor

All BJTs datasheetsAll STMicroelectronics datasheets (808)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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