SparkFun
TIP122G NPN Darlington Transistor - 100V 5A
· MPN: COM-17756
The TIP122G is a high-power NPN Darlington transistor for switching heavier loads from a low-current microcontroller output. It is well suited to projects wh...
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The TIP122G is a high-power NPN Darlington transistor for switching heavier loads from a low-current microcontroller output. It is well suited to projects where an Arduino, Raspberry Pi or similar controller needs to drive a motor, solenoid, high-power LED strip or relay.
A Darlington transistor combines two transistors in one package, giving this part a very high DC current gain. That means a small 3.3V or 5V logic-level signal can control a much larger load current when the circuit is designed correctly.
This through-hole device is intended for general-purpose amplification and low-speed switching, making it a useful digital on/off switch for maker and electronics projects. A datasheet is provided by the supplier for circuit design details.
Specifications:
- Type: NPN - Darlington
- Current - Collector (Ic) (Max): 5A
- Voltage - Collector Emitter Breakdown (Max): 100V
- Vce Saturation (Max) @ Ib, Ic: 4V @ 20mA, 5A
- Current - Collector Cutoff (Max): 500µA
- DC Current Gain (hFE) (Min) @ Ic, Vce: 1000 @ 3A, 3V
- Power - Max: 2W
- Operating Temperature: -65°C ~ 150°C (TJ)
- Mounting Type: Through Hole
- Mfg # TIP122G
Use it anywhere you need a simple transistor switch between logic electronics and larger DC loads, with appropriate base resistor, load supply and flyback protection where required.
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- flyback protection
- A protection method used with coils such as relays, solenoids, and motors to absorb the voltage spike created when the coil is switched off. Adding a diode for flyback protection helps prevent damage to transistors, microcontrollers, or other control electronics.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- through-hole
- A mounting style where the component leads pass through holes in a circuit board and are soldered on the other side. Through-hole parts are often easier to handle and solder by hand, which is useful for classroom and hobby projects.
Find this product in
TIP122G NPN Darlington Transistor Datasheet
Datasheet · 217.2 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 410.4 KB · Click any page to view full size
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