18V 3A AC-DC Switching Power Supply Module 54W Step-Down
18V 3A AC-DC Switching Power Supply Module 54W Step-Down
18V 3A AC-DC Switching Power Supply Board – 54W Step-Down Converter Module
Power your electronics projects with confidence using this compact yet capable 54W switching power supply board. Designed to convert AC mains voltage (85–240V) down to a stable 18V DC output at up to 3A, this module is an ideal drop-in solution for DIY electronics, automation systems, LED drivers, industrial control boards, and more. Built-in overcurrent protection keeps your circuits and connected devices safe during unexpected load spikes.
Key Features
- Wide AC Input Range: Accepts AC 85V–240V, making it compatible with power grids worldwide.
- Stable 18V DC Output: Delivers a clean, regulated 18V at up to 3A for consistent performance.
- 54W Rated Power: Handles demanding loads across a variety of electronics and embedded applications.
- Built-In Overcurrent Protection: Automatically safeguards your circuits from excessive current draw.
- Compact Form Factor: Measures just 90 × 45 × 28 mm — easy to integrate into enclosures, panels, or project builds.
- Switching Design: High-efficiency switching topology reduces energy waste and heat generation compared to linear regulators.
Technical Specifications
| Input Voltage | AC 85V – 240V |
| Output Voltage | 18V DC |
| Output Current | 3A (max) |
| Rated Power | 54W |
| Dimensions | 90 × 45 × 28 mm |
| Protection | Overcurrent Protection |
What's in the Box?
- 1× 18V 3A Switching Power Supply Module
Important Notes
- Colors may vary slightly from product images due to lighting and display differences.
- Please allow a tolerance of 1mm–1cm due to manual measurement.
- This module operates at mains voltage. Always follow proper electrical safety practices during installation. Refer to OSHA's Electrical Safety Guidelines for best practices when working with AC-powered electronics.
Made in Mainland China.
Frequently Asked Questions
Q: What input voltage range does this AC-DC power supply module support?
A: This switching power supply board accepts a wide AC input range of 85V to 240V, making it fully compatible with standard mains voltage in North America, Europe, Asia, and most other regions worldwide.
Q: Is this 18V power supply module suitable for DIY and hobbyist electronics projects?
A: Absolutely. Its compact 90 × 45 × 28 mm footprint, screw-terminal connections, and broad input range make it a popular choice for DIY electronics, embedded systems, automation controllers, LED strip drivers, and custom enclosure builds requiring a stable 18V DC supply.
Q: What does the built-in overcurrent protection do?
A: The overcurrent protection feature monitors the output current and automatically limits or shuts down the output if the current draw exceeds safe levels. This protects both the module itself and any connected components from damage during short circuits or unexpected load spikes.
Q: How efficient is a switching power supply compared to a linear regulator?
A: Switching power supplies like this module are significantly more efficient than traditional linear regulators — typically achieving 80–90%+ efficiency — meaning they convert most of the input power to usable DC output rather than dissipating it as heat. This makes them ideal for enclosed or space-constrained builds.