Are all USB-C cables compatible?

Answered by Antonio Sutton

Are all USB-C cables compatible?

Not all USB-C cables are compatible with high-power charging. USB-C cables are designed to support a variety of power levels and data transfer speeds, but the specific capabilities of a cable can vary depending on its construction and features.

USB-C cables are categorized into different power ratings, which determine their ability to handle current and voltage. The minimum requirement for all USB-C cables is to be able to carry a minimum of 3A current at 20V (60W). This rating allows for standard charging and data transfer speeds.

However, for high-power charging at 20V/5A (100W), you need a USB-C to USB-C cable that is specifically rated for 5A. These cables are capable of handling the increased current required for fast charging at higher power levels.

To further ensure compatibility and proper power delivery, high-power USB-C to USB-C cables also contain an E-Marker chip. This chip communicates with the device and charger to identify the cable and its current capabilities. It enables the device to negotiate the appropriate power level and ensures safe and efficient charging.

It’s important to note that using a lower-rated USB-C cable for high-power charging can result in slower charging speeds, or in some cases, the cable may not be able to handle the higher current at all, leading to potential damage or overheating.

When purchasing USB-C cables, it’s crucial to check their power ratings and capabilities. Look for cables that explicitly state support for high-power charging and contain an E-Marker chip. This ensures compatibility with devices and chargers that require higher power levels.

In my personal experience, I have come across USB-C cables that claim to support high-power charging, but upon closer inspection, they lacked the necessary 5A rating or the E-Marker chip. Using these cables for high-power charging resulted in slower charging speeds or even failure to charge altogether.

To summarize, not all USB-C cables are compatible with high-power charging. It is essential to choose a USB-C to USB-C cable that is rated for 5A and contains an E-Marker chip to ensure proper power delivery and compatibility with devices and chargers that support high-power charging.