---
title: tIOUSB30BusCurrent
framework: USBDriverKit
role: symbol
role_heading: Enumeration
platforms: [driverkit 19.0+]
path: usbdriverkit/tiousb30buscurrent
---

# tIOUSB30BusCurrent

Constants for the available power levels of USB 3.0 devices.

## Declaration

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

## Topics

### Getting the Current Limits

- [kIOUSB30BusCurrentMinimum](usbdriverkit/tiousb30buscurrent/kiousb30buscurrentminimum.md)
- [kIOUSB30BusCurrentDefault](usbdriverkit/tiousb30buscurrent/kiousb30buscurrentdefault.md)
- [kIOUSB30BusCurrentMaxPowerUnits](usbdriverkit/tiousb30buscurrent/kiousb30buscurrentmaxpowerunits.md)

## See Also

### Electrical Characteristics

- [tIOUSB20BusCurrent](usbdriverkit/tiousb20buscurrent.md)
- [tIOUSBBusVoltage](usbdriverkit/tiousbbusvoltage.md)