5W AC/DC Step Down Buck Converter Module – 12V / 5V for Arduino & DIY Electronics

Take your DIY electronics projects to the next level with this compact, high-efficiency AC/DC Step Down Buck Converter Module. Whether you're powering an Arduino, a Raspberry Pi accessory, a smart home sensor, or any low-voltage embedded system, this versatile voltage regulator module delivers stable, regulated DC output from a wide-range AC or DC input — all in a tiny SMD form factor.

Key Specifications

Input Voltage: AC 85–265V (50/60Hz) or DC 100V–370V
Output Options: 12V @ 450mA (5W) or 5V @ 700mA (3.5W)
5V Output Voltage Range: 3.1–3.5V
5V Peak Current: 800mA
5V Ripple: 60mV
Dissipation Power: 5V model – 3.5W | 12V model – 5W
Operating Temperature: -20°C to +60°C
Package Type: SMD (Surface-Mount Device)
12V Module Dimensions: 30 × 20 × 18mm (L×W×H)
5V Module Dimensions: 21.2 × 29.9mm
Applications: Arduino projects, robotics, LED drivers, smart home automation, computer peripherals, and more

Why Choose This Buck Converter Module?

✅ Wide input range – Works with standard mains AC or high-voltage DC sources
✅ Compact SMD design – Fits easily into tight enclosures and custom PCB layouts
✅ Stable regulated output – Low ripple for clean power delivery to sensitive electronics
✅ Multiple quantity options – Available as single (1PCS) or value packs (5PCS) in both 12V and 5V variants
✅ Broad temperature range – Reliable performance from -20°C to +60°C
✅ Perfect for makers and hobbyists – Drop-in power solution for Arduino, DIY electronics, and embedded systems

What's Included

1× or 5× AC/DC Step Down Buck Converter Module (12V or 5V – your choice)

Available Variants

1PCS 12V | 5PCS 12V | 1PCS 5V | 5PCS 5V

Frequently Asked Questions

Q: What input voltage does this AC/DC step down buck converter module support?

A: This buck converter module accepts a wide input range of AC 85–265V at 50/60Hz or DC 100–370V, making it compatible with standard household mains power supplies as well as a variety of DC sources used in DIY electronics and industrial applications.

Q: What is the difference between the 12V and 5V output versions?

A: The 12V model delivers up to 450mA at 12V (5W total), while the 5V model outputs up to 700mA at 5V (3.5W), with a peak current capability of 800mA. Choose the 12V version for higher-voltage peripherals and the 5V version for powering microcontrollers like Arduino or Raspberry Pi accessories directly.

Q: Is this module compatible with Arduino and other DIY electronics platforms?

A: Yes! This step down buck converter is specifically designed for use with Arduino, Raspberry Pi, robotics, LED driver circuits, smart home sensor nodes, and any other DIY or embedded electronics project that requires a stable, regulated low-voltage DC supply from a mains AC source.

Q: How small is this module — will it fit inside my project enclosure?

A: The module is extremely compact. The 12V variant measures just 30 × 20 × 18mm (L×W×H), and the 5V variant footprint is 21.2 × 29.9mm. Its SMD construction makes it straightforward to integrate into custom PCBs or tight enclosures.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.