LM7812 12V Voltage Regulator IC TO-220 1A Linear Regulator Through Hole

LM7812 12V Voltage Regulator IC – TO-220 1A Linear Regulator (Through Hole)

The LM7812 is a classic fixed positive linear voltage regulator that delivers a stable +12V output at up to 1A of continuous current. Housed in the industry-standard TO-220 package, it is easy to heatsink and integrate into power supply circuits for a wide range of electronics applications.

Key Specifications

• Output Voltage: +12V (fixed)
• Output Current: Up to 1A continuous
• Input Voltage Range: 14.5V to 35V
• Package: TO-220 (3-pin through hole)
• Dropout Voltage: ~2.5V typical
• Line Regulation: ≤4 mV
• Operating Temperature: 0°C to +125°C

Compatibility & Use Cases

The LM7812 is widely used in power supply designs for Arduino shields, ESP32 modules, relay boards, and other 12V-powered IoT peripherals. Typical applications include:

• Regulated 12V bench power supply circuits
• Motor driver and relay module power rails
• LED driver and strip power regulation
• Sensor and actuator power conditioning
• DIY lab power supply and voltage reference circuits

Pair with input/output filter capacitors (100nF ceramic + 10µF electrolytic) for optimal stability and ripple rejection.

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