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# tIOUSB30BusCurrent

Constants for the available power levels of USB 3.0 devices.

```
enum tIOUSB30BusCurrent : unsigned int;
```

## Topics

### Getting the Current Limits

[`kIOUSB30BusCurrentMinimum`](/documentation/USBDriverKit/tIOUSB30BusCurrent/kIOUSB30BusCurrentMinimum)

[`kIOUSB30BusCurrentDefault`](/documentation/USBDriverKit/tIOUSB30BusCurrent/kIOUSB30BusCurrentDefault)

[`kIOUSB30BusCurrentMaxPowerUnits`](/documentation/USBDriverKit/tIOUSB30BusCurrent/kIOUSB30BusCurrentMaxPowerUnits)


---

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