Product Introduction

This USB to Micro USB Step-Down Converter Cable reduces the standard 5V USB voltage down to 3.3V (or 3V), making it perfect for powering Arduino modules, ESP8266 boards, low-voltage sensors, and other DIY electronic components that require a lower voltage input.

It's a convenient solution for hobbyists, technicians, and makers who work with sensitive microcontrollers or 3.3V systems.

Key Specs

• Input: 5V from USB-A

• Output: 3.3V / 3V via Micro USB

• Length: 30cm–50cm or custom

• Wire Gauge: 24AWG Power Line

• Protection: Overload, short-circuit protection (depends on chip)

Product Features

• Safely powers 3.3V microcontroller boards from USB

• Plug-and-play, no external components needed

• Compact and portable for lab or field use

• Clean and stable voltage output

• Ideal for DIY electronics and IoT applications

Compatible Devices

• Arduino Pro Mini 3.3V

• ESP8266 / NodeMCU

• OLED / I2C modules (3.3V input only)

• Li-Ion charging boards (with 3V-3.7V limit)

• Prototyping boards and test environments

Note: Not suitable for charging smartphones or tablets.
Ensure your device supports 3.3V power input before use.

Safety & Usage Notes

• Do not overload (1A max recommended)

• Avoid reverse connection

• Not suitable for data transmission (power only)

• Use in dry, indoor environments only

• Check output voltage variant before connecting to sensitive modules

OEM & Customization Options