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)