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Get 5V from USB-C: Default Power vs PD Trigger

How to get 5V from a USB-C cable?

To get 5V from a USB-C cable, you need a USB-C power source (charger, power bank, or USB port) that provides 5V on VBUS and a cable/device setup that either accepts the default 5V or negotiates the correct USB-C/USB Power Delivery (PD) profile. Many USB-C sources output 5V by default, but some combinations require a proper “sink” device or a PD trigger to reliably present 5V on the output.

Use a standard USB-C charger or USB-A to USB-C adapter for simple 5V

The easiest way is to plug your USB-C cable into a typical phone charger or USB-A port (using a USB-A to USB-C cable or adapter). USB-A ports are 5V by design, and most USB-C chargers also provide 5V as the default voltage even when they can supply higher PD voltages.

When you need a PD trigger (USB-C to bare wires, electronics, or prototypes)

If you’re powering a project (like a microcontroller, LED strip, or test rig) and your “device” can’t negotiate USB-C/PD, use a USB-C PD trigger module configured for 5V. The trigger acts like a USB-C sink and requests/accepts 5V so the source will enable power in a predictable way. Without a trigger, some USB-C sources may not deliver power the way you expect, especially with non-standard loads.

Check your cable and source ratings

Not all USB-C cables behave the same. Full-featured USB-C to USB-C cables are designed for PD negotiation and can carry higher current when paired with compatible hardware. If your goal is steady 5V at higher current (for example, 3A–5A), make sure the charger supports it and the cable is rated appropriately. For a deeper breakdown of cable types, current limits, and PD behavior, see this USB-C cable guide.

Quick safety notes

Avoid connecting random USB-C wires directly to batteries or unknown power sources. Use a known-good USB-C charger/power bank, and if you’re building a custom lead, include proper fusing and strain relief. Also confirm polarity and ground before powering sensitive electronics.

FAQ

Can a USB-C cable supply 12V or 20V?

Yes, but only when the USB-C power source and the connected device (or a PD trigger) negotiate a USB Power Delivery profile for 12V, 15V, or 20V. Otherwise, most USB-C sources stay at the default 5V.