TIP112 Transistor Pinout, Features, Equivalent, Uses and More

TIP112 is a medium power general-purpose transistor designed for general switching and amplification purposes. This post describes the TIP112 transistor pinout, features, equivalent, uses, and other information about this transistor.


TIP112 Transistor Pinout, Features, Equivalent, Uses



Features / Technical Specifications:

  • Package Type: TO-220
  • Transistor Type: NPN
  • Max Collector Current(IC): 2A
  • Max Collector-Emitter Voltage (VCE): 100V
  • Max Collector-Base Voltage (VCB): 100V
  • Max Emitter-Base Voltage (VEBO): 5V
  • Max Collector Dissipation (Pc): 50 Watt
  • Minimum & Maximum DC Current Gain (hFE): 500 To 1000
  • Max Storage & Operating temperature: -65 to +150 Centigrade


PNP Complementary:

PNP Complementary of TIP112 is TIP117


Replacement and Equivalent:

The max collector-emitter and collector-base voltage of the transistor is 100V but if your load is under 60V then you can also use the other NPN transistor of this series which are exact match of TIP112, the part numbers are TIP110 and TIP111. Other possible equivalents are 2SC1880, 2SC1944, 2SC1983, 2SC1984, 2SD679, 2SD689, 2SD990, BD411, BD412, TIP132, TIP122, TIP102, 2SD1828, 2SD1830, 2SD1892, 2SD2241, 2SD560, 2SD633, MJF122, MJF6388.


TIP112 Transistor Explained / Description:

TIP112 is a TO-220 package darlington transistor. A darlington transistor is a type of transistor that contains two transistor inside that are connected in a way (As shown in the diagram above in the TIP112 pinout image) that amplifies the output gain of the transistor many times. The TIP112 transistor also provides gain of 500 to 1000 but there are other transistors that provide maximum DC current gain of up to 20,000 or more. TIP112 transistor is designed to use in wide variety of general-purpose switching and amplification applications in industrial electronics but it can also be used in educational and hobby projects. The maximum collector to emitter voltage is 100V so it can drive load of upto 100V. The maximum collector current of the transistor is 2 ampere therefore it can drive a load continuously under 2A and the maximum peak collector current is 4A mean it can drive 4A load for milliseconds not continuously. However, to drive any load the transistor must have heatsink on it. Its low collector-emitter saturation capability makes it ideal to use in low voltage and battery-operated applications.


Where We Can Use it & How to Use:

TIP112 transistor can be used in variety of general-purpose switching and amplification purposes. When used as a switch it can drive variety of load under 2A but it is not recommended for high speed switching applications but it doesn’t mean that it can not be used to drive loads or switch loads, the user can use it for any general-purpose switching application. Other than that, it can also be used as a general-purpose amplifier in variety of applications. Moreover, it can also be used at the output of arduino and other electronic platforms to control loads.



Audio Amplifier


Motor Drivers

Solar Applications

Battery Chargers

Battery Operated Applications


Safe Operating Guidelines / Absolute Maximum Ratings:

In order to operate this transistor safely and achieve long life performance with this device, it is recommended not to use it for its absolute maximum rating and always stay below 20%. The maximum output current of the transistor is 2A so do not drive load of more than 1.6A. The maximum collector-emitter voltage is 100V therefore do not drive load of more than 80V. Use a proper heatsink with the transistor and always store or operate the transistor in temperatures above -65°C and below 150°C.



To download the datasheet just copy and paste the below link in your browser.


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