L7818 Linear Voltage Regulator – 18V Fixed Output

🔧 L7818 Linear Voltage Regulator – Stable 18V Fixed Output Power Supply

The L7818 is a reliable linear voltage regulator from the popular 78xx series, designed to deliver a stable and regulated 18V DC output from a higher input voltage source.

It is widely used in power circuits, control systems, audio applications, and industrial electronics that require clean and consistent voltage.

The regulator can supply up to 1A of output current and features built-in thermal shutdown, overcurrent protection, and short-circuit protection, ensuring safe and dependable operation.

Its TO-220 package allows easy installation and supports heatsink mounting for higher power dissipation.

✅ Specifications:

• Type: Linear Voltage Regulator
• Model: L7818 / 7818
• Output Voltage: 18V Fixed
• Maximum Output Current: 1A
• Recommended Input Voltage: 21V – 35V DC
• Maximum Input Voltage: 35V
• Output Accuracy: ±4%
• Ripple & Noise: Low
• Protection Features:
• Thermal Shutdown
• Overcurrent Protection
• Short-Circuit Protection
• Package Type: TO-220
• Operating Temperature: 0°C to 125°C
• Weight: ≈ 2.5g

🔹 Key Features:

✔ Stable and clean 18V output

✔ Ideal for power and control circuits

✔ Built-in safety protections

✔ Easy integration into linear power supplies

✔ Supports heatsink installation

📌 Common Applications:

• Audio amplifier circuits
• Industrial control systems
• Linear power supplies
• Relay and actuator power
• Embedded and DIY electronics projects