# Can I run GigaBlox SFP from the 5V of a USB3 Port?

**URL:** <https://forum.botblox.org/t/can-i-run-gigablox-sfp-from-the-5v-of-a-usb3-port/331>\
**Category:** BotBlox Hardware\
**Tags:** gigablox-sfp\
**Created:** [October 19, 2024, 11:23am UTC](https://forum.botblox.org/t/can-i-run-gigablox-sfp-from-the-5v-of-a-usb3-port/331 "2024-10-19T11:23:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![botblox\_admin](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.botblox.org/botblox_admin/32/1_2.png) [@botblox\_admin](https://forum.botblox.org/u/botblox_admin)\
**Post date:** [October 19, 2024, 11:23am UTC](https://forum.botblox.org/t/can-i-run-gigablox-sfp-from-the-5v-of-a-usb3-port/331/1 "2024-10-19T11:23:07Z")

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_– Copied from customer query –_

Quick question… about the Gigablox SFP board. Website says 5v-60v but dataset says minimum 5.5v. I’m just wondering if this boats will power off a Usb3 port?

Usb3 port is 5v @4.5W which seems right on your lower limit. Just wondering if this has been tested at all?

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**Author:** ![josh\_elijah](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.botblox.org/josh_elijah/32/568_2.png) [@josh\_elijah](https://forum.botblox.org/u/josh_elijah)\
**Post date:** [October 19, 2024, 11:25am UTC](https://forum.botblox.org/t/can-i-run-gigablox-sfp-from-the-5v-of-a-usb3-port/331/2 "2024-10-19T11:25:09Z")

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This is covered in the datasheet.

 ![image](https://canada1.discourse-cdn.com/flex027/uploads/botblox1/original/1X/b308aa8c41adf14f956f322e432884f442256ef5.png)

 ![image](https://canada1.discourse-cdn.com/flex027/uploads/botblox1/original/1X/5e98b71d9ccc981971d2270360f1162312fa2488.png)

If using an unregulated 5.5V to 60V input, then apply that to the main voltage input.

If using a pre-regulated 5V input, then apply that to the 5V Voltage Input/Output (Auxiliary 5V input).

A 5V rail from a USB port applied to the Auxiliary 5V input should work just fine.