🔌 USB Cable Amp Rating Guide

The ampere (amp) rating of a USB data cable determines how much electrical current it can safely carry. This affects your device’s charging speed and the cable’s durability.

⚙️ Typical Amp Ratings

USB Type	Amp Rating	Max Power (at 5V)
USB 2.0	0.5A – 1A	2.5W – 5W
USB 3.0 / 3.1	1.5A – 3A	7.5W – 15W
USB-C (Standard)	Up to 3A	15W
USB-C (PD with E-Mark)	Up to 5A	Up to 100W

💡 Tip: Always match your cable’s amp rating with your charger and device for safe and fast charging.

🧪 How to Check Amp Rating

• Look for labels like "3A Max" on the packaging.
• USB-C cables with >3A must include an e-marker chip.
• Thicker cables (lower AWG) usually support more current.
• Use a USB tester to measure real-time current during charging.

⚠️ Warning: Using a low-amp cable with a fast charger can cause overheating or device damage.