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TIP120

Darlington Transistor

The TIP120 is a darlington transistor from STMicroelectronics. View the full TIP120 datasheet below including key specifications, electrical characteristics.

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

Manufacturer

STMicroelectronics

Category

BJTs

Package

TO-220

TIP120 Key Specifications

ParameterValue
PolarityNPN
Base Current (IB)0.12A
Storage Temperature-65°C to 150°C
DC Current Gain (HFE)1000 min at IC=0.5A and 3A, VCE=3V
Collector Current (IC)5A
Emitter-Base Voltage (VEBO)5V
Collector Peak Current (ICM)8A
Collector-Base Voltage (VCBO)60V
Collector-Emitter Voltage (VCEO)60V
Thermal Resistance Junction-Case1.92 °C/W max
Total Dissipation (Tc ≤ 25°C)65W
Base-Emitter On Voltage (VBE(On))2.5V max at IC=3A, VCE=3V
Thermal Resistance Junction-Ambient62.5 °C/W max
Operating Junction Temperature (Max)150°C
Collector-Emitter Saturation Voltage (VCE(Sat))2V max at IC=3A, IB=12mA; 4V max at IC=5A, IB=20mA
Collector-Emitter Sustaining Voltage (VCEO(Sus))60V min at IC=30mA

TIP120 Overview

Part: TIP120, TIP121, TIP122, TIP125, TIP126, TIP127 — STMicroelectronics

Type: Complementary power Darlington transistors

Description: Complementary NPN-PNP Darlington transistors with low collector-emitter saturation voltage and high gain, manufactured in planar technology for general purpose linear and switching applications.

Operating Conditions:

  • Operating temperature: -65 to 150 °C
  • Max collector current: 5 A
  • Max collector-emitter voltage: 100 V

Absolute Maximum Ratings:

  • Max supply voltage: 100 V (V_CEO for TIP122/127)
  • Max continuous current: 5 A (Collector current I_C)
  • Max junction temperature: 150 °C

Key Specs:

  • Collector-emitter sustaining voltage (V_CEO(sus)): 60 V (min) for TIP120/125, 80 V (min) for TIP121/126, 100 V (min) for TIP122/127 (I_C = 30 mA)
  • Collector-emitter saturation voltage (V_CE(sat)): 2 V (max) at I_C = 3 A, I_B = 12 mA
  • Collector-emitter saturation voltage (V_CE(sat)): 4 V (max) at I_C = 5 A, I_B = 20 mA
  • Base-emitter on 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) at V_CE = 50 V (for TIP122/127)
  • Emitter cut-off current (I_EBO): 2 mA (max) at V_EB = 5 V

Features:

  • Low collector-emitter saturation voltage
  • Complementary NPN - PNP transistors

Applications:

  • General purpose linear and switching

Package:

  • TO-220

TIP120 Features

  • ■ Low collector-emitter saturation voltage
  • ■ Complementary NPN - PNP transistors

TIP120 Electrical Characteristics

(T case = 25 °C ; unless otherwise specified)

Table 4. Electrical characteristics (1)

SymbolParameterTest conditionsTest conditionsMin.Typ.Max.Unit
I CEOCollector cut-off current (I B = 0)for TIP120/125 for TIP121/126 for TIP122/127V CE = 30 V V CE = 40 V V CE = 50 V0.5 0.5 0.5mA mA mA
I CBOCollector cut-off current (I B = 0)for TIP120/125 for TIP121/126 for TIP122/127V CE = 60 V V CE = 80 V V CE = 100 V0.2 0.2 0.2mA mA mA
I EBOEmitter cut-off current (I C = 0)V EB = 5 V2mA
V CEO(sus) (2)Collector-emitter sustaining voltage (I B = 0)I C = 30 mA for TIP120/125 for TIP121/126 for TIP122/12760 80 100V V V
V CE(sat) (2)Collector-emitter saturation voltageI C = 3 A I C = 5 AI B = 12 mA I B = 20 mA2 4V V
V BE(on) (2)Base-emitter on voltageI C = 3 AV CE = 3 V2.5V
h FE (2)DC current gainI C = 0.5 A I C = 3 AV CE = 3 V V CE = 3 V1000 1000

TIP120 Thermal Information

SymbolParameterValueUnit
R thj-caseThermal resistance junction-case max.1.92°C/W
R thj-ambThermal resistance junction-ambient max.62.5°C/W

TIP120 Package Information

In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com

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
TIP120/125STMicroelectronicsTO-220

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  • 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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