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MC78T12 12V 3A Voltage Regulator
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The MC78T12 is a positive linear voltage regulator in a TO-220 package, providing a fixed 12 V output at up to 3 A. It accepts an input voltage range of 12–3...
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The MC78T12 is a positive linear voltage regulator in a TO-220 package, providing a fixed 12 V output at up to 3 A. It accepts an input voltage range of 12–35 V and includes built-in thermal overload and short-circuit protection, making it a reliable choice for powering 12 V circuits from higher-voltage supplies.
Key Features
- Fixed 12 V Output – Regulated output of 11.5–12.5 V
- 3 A Maximum Current – Suitable for moderate-load applications
- TO-220 Package – Through-hole mounting with heatsink tab
- Built-in Protection – Thermal overload and short-circuit protection
Specifications
- Regulator Type – Positive linear, monolithic
- Output Voltage – 11.5–12.5 V (nominal 12 V)
- Maximum Output Current – 3 A
- Input Voltage Range – 12–35 V
- Package – TO-220 (3-pin, through-hole)
- Pin Pitch – 2.54 mm
- Lead Diameter – 0.8 mm
- Max Operating Temperature – 125 °C
Ideal For
- Regulated 12 V power supplies
- Powering motors, relays, and LED strips from higher-voltage sources
- Bench power supply projects
Package Contents
- 1× MC78T12 voltage regulator (TO-220)
Jargon buster
Plain-language definitions for the technical terms used above.
- 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.
- 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.
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