SparkFun
Voltage Regulator - 12V
The L7812 is a three-terminal positive voltage regulator with a fixed 12V output. It provides stable local regulation with built-in protection against overcu...
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The L7812 is a three-terminal positive voltage regulator with a fixed 12V output. It provides stable local regulation with built-in protection against overcurrent, thermal overload, and short circuits, making it a reliable choice for powering 12V components in your projects.
With a maximum output current of 1.5A, this regulator is well-suited for powering sensors, relay modules, LED strips, and other 12V peripherals from a higher-voltage supply.
Key Features
- Fixed 12V Output – Stable regulated voltage for consistent performance
- 1.5A Maximum Current – Sufficient for most common 12V loads
- Thermal Overload Protection – Automatically shuts down if the junction temperature is exceeded
- Short Circuit Protection – Built-in current limiting prevents damage from output faults
- Output Transition SOA Protection – Safe operating area protection during load changes
Specifications
- IC: L7812
- Output Voltage: 12V (fixed)
- Output Current: 1.5A max
- Package: TO-220
Ideal For
- Powering 12V sensors and relay modules
- Regulated supply for LED strips and motor drivers
- Bench power supplies and prototyping
- Any project requiring a stable 12V rail from a higher-voltage source
Package Contents
- 1× L7812 Voltage Regulator (TO-220)
Resources
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.
- Short circuit protection
- A safety feature that helps protect the device if its output or wiring is accidentally connected in a way that causes excessive current flow. This matters in automation wiring because mistakes or damaged cables can otherwise destroy the sensor or power supply.
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Brands
TO-220 Voltage Regulator Datasheet
Datasheet · 1.8 MB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 486.2 KB · Click any page to view full size
Related Tutorials
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