12V 3A AC DC Power Supply Adapter

AC-DC Power Supply Adapter 12V 3A — Reliable 12V DC Power

The AC-DC Power Supply Adapter 12V 3A provides a stable, regulated 12V DC output with a maximum current of 3A (36W). Designed for makers, hobbyists and professionals, this adapter converts 100–240V AC mains to a low-noise, low-ripple DC supply suitable for a wide range of electronics.

Why choose this 12V 3A power adapter?

• Regulated output ensures steady voltage and protects sensitive electronics from voltage fluctuations.
• High efficiency design minimizes heat and power loss for reliable long-term use.
• Multiple built-in safety protections including over-voltage, over-current and short-circuit protection.
• Standard 5.5mm x 2.1mm barrel plug for broad compatibility with consumer and maker devices.

Key Features

• Input Voltage: 100–240V AC, 50/60Hz
• Output Voltage: 12V DC (regulated)
• Maximum Output Current: 3A
• Output Power: 36W (max)
• Connector: 5.5mm x 2.1mm DC barrel plug
• Protections: Overload, short-circuit, over-voltage protection
• High efficiency and low ripple design for stable performance
• Compact, lightweight and portable housing

Technical Specifications

• Model: AC-DC Power Supply Adapter 12V 3A
• Input Range: 100–240V AC
• Frequency: 50/60Hz
• Output: 12V DC, up to 3A
• Maximum Power: 36W
• Connector Type: 5.5mm x 2.1mm barrel
• Protection Features: OVP, OCP, SCP

Applications and Compatibility

This 12V 3A adapter is ideal for a wide range of devices and projects:

• Arduino and other microcontroller boards
• LED strip lighting and lighting controllers
• CCTV security cameras and DVR systems
• Routers, modems and small networking equipment
• Small DC motors, hobby electronics and robotics
• DIY projects in workshops, labs and classrooms

Installation and Safety Tips

• Verify device voltage and current requirements before connecting.
• Ensure the barrel connector polarity matches the device specifications (center positive is common).
• Avoid exposing the adapter to moisture or extreme temperatures.
• Unplug the adapter before servicing connected equipment.

What’s in the Box

• AC-DC Power Supply Adapter 12V 3A with 5.5mm x 2.1mm barrel plug
• User note: Images are for illustration purposes only

Who should buy this adapter?

If you need a dependable, compact 12V DC power source for Arduino projects, LED lighting, CCTV systems or small electronics, this 12V 3A AC-DC adapter is a practical and economical choice. Its regulated output and built-in protections make it suitable for both prototyping and deployment.

Note: Always confirm the required polarity and current draw of your device before connecting a power adapter.