The BDD DC/DC Buck Converter 12V to 5V 3A with Micro USB Output is a compact, high-efficiency step-down (buck) voltage converter module designed to convert 12V DC power down to a stable 5V DC output. It is ideal for powering USB-powered devices, embedded electronics, microcontrollers, development boards, GPS units, dashcams, DIY electronics, and other low-voltage digital systems directly from a 12V power source such as vehicle batteries, solar systems, power supplies, and industrial DC lines.
This module uses an imported integrated switching regulator with synchronous rectification technology, achieving a conversion efficiency of up to 96%, which means minimal heat generation, low power loss, and high reliability. Unlike linear regulators, this switching design ensures efficient operation even at higher current loads.
The entire circuit is epoxy-potted, making the module:
Water-resistant
Dust-resistant
Moisture-resistant
Vibration-resistant
Shock-resistant
This makes it perfectly suited for automotive, industrial, and outdoor environments where reliability and durability are essential.
The converter includes full electronic protection systems, ensuring long-term stable operation and device safety:
Over-voltage protection
Over-current protection
Over-temperature protection
Short-circuit protection
Automatic recovery when fault conditions are removed
It features an inline Micro USB output connector, making it extremely convenient for powering devices that accept 5V via Micro USB such as:
Arduino boards
ESP modules
Raspberry Pi accessories
GPS trackers
Development boards
Embedded systems
IoT devices
Bluetooth modules
Camera modules
Important Note:
This module is not suitable for resistive loads and is not compatible with iPhone, iPod, or Samsung Galaxy S4 devices, due to device-specific charging protocols and current detection requirements.
With its ultra-thin profile, small footprint, and high output current capacity (3A), this buck converter is ideal for projects requiring compact size, high efficiency, and stable 5V power delivery from a 12V source.
Key Applications
Automotive electronics (12V systems)
Car dashcams & GPS power supplies
DIY electronics projects
Arduino / ESP / MCU power supply
IoT devices
Embedded systems
Robotics
LED controllers
Development boards
Industrial DC systems
Solar-powered systems
Key Features
High-efficiency DC/DC step-down (buck) converter
Converts 12V DC to stable 5V DC
3A output current (15W power)
Up to 96% conversion efficiency
Synchronous rectification technology
Fully epoxy-potted (waterproof & dustproof)
Ultra-thin, compact design
Integrated Micro USB output connector
Low heat generation
High reliability
Long-term stable operation
Automatic fault protection and recovery
Easy installation
Technical Specifications
Input Voltage: DC 8-20V
Nominal Input: 12V DC
Output Voltage: DC 5V
Output Current: Up to 3A
Output Power: 15W
Efficiency: 96%
Protection: Over-voltage, over-current, over-temperature, short-circuit
Output Connector: Micro USB (inline)
Module Size: 46 × 27 × 14 mm
Construction: Epoxy potted (sealed)
Cooling: Passive (no fan required)
The BDD DC/DC 12V to 5V 3A Micro USB Buck Converter is a reliable, efficient, and compact power solution for safely powering 5V electronics from 12V systems, making it perfect for automotive installs, embedded projects, and professional electronic applications where stability, protection, and durability are critical.
What's in the box
1 x BDD DC/DC Buck Converter 12V to 5V 3A with Micro USB Output
