AC To DC Power Supply 3V 1A Adapter 3W 100 To 240V Input With 5.5x2.5mm And 5.5x2.1mm Output Plug Polarity Inside Positive Center For LED Lights Mini Fans Routers CCTV

3V 1A DC power supply for LED lights and routers
✔️ Single unit, 3V 1A output, 100-240V input, 5.5x2.5mm/5.5x2.1mm

This compact AC to DC power supply converts mains voltage (100-240V AC) to a stable 3V DC output, suitable for low-power electronics. It's commonly used to power LED light strings, small USB hubs, routers, CCTV cameras, mini fans, and other 3V devices drawing up to 3W. Ensure correct plug size and polarity before use.

✅ Output: 3V DC, 1A max (3W)
✅ Input: 100-240V AC, 50/60Hz
✅ Plug size and polarity: 5.5x2.5mm, compatible with 5.5x2.1mm; center positive
✅ Safety features: overcurrent, overvoltage, overload, and short-circuit protection; FCC, CE, RoHS, CCC
✅ Cord length: about 3 ft 2 in (≈ 965 mm)
✅ Applications: powers 3V LED strings, USB hubs, Bluetooth speakers, wireless routers, CCTV cameras, mini fountains

💡 What is a 3V 1A DC power supply used for in small electronics and LED projects?

This handy guide explains common uses and safety basics. - 3V 1A DC power supply is handy for LED strings, microcontrollers, and small fans. - Check plug compatibility (5.5x2.5mm vs 5.5x2.1mm) and polarity (center positive) before powering devices. - Use with devices under 3W and avoid overload to prevent damage.