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🔒 Power off, data on — the smart shield your tech deserves!
The PortaPow USB Power Blocker is a clear, compact USB-A adaptor that disconnects the 5V power line while allowing USB 2.0 data transfer. Designed for specialist applications like 3D printers and Raspberry Pi setups, it prevents unwanted power-related issues without interfering with data flow. Lightweight and plug-and-play, it offers a no-fuss solution trusted by professionals seeking precise device protection.
| ASIN | B094FYL9QT |
| Best Sellers Rank | 11,685 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 1,489 in USB Cables |
| Brand | PortaPow |
| Brand Name | PortaPow |
| Colour | Clear |
| Compatible Devices | 3D Printer, Raspberry Pi |
| Compatible devices | 3D Printer, Raspberry Pi |
| Connector Type | USB Type A |
| Connector type | USB Type A |
| Country of Origin | China |
| Customer Reviews | 4.1 out of 5 stars 756 Reviews |
| Global Trade Identification Number | 00027829469634 |
| Manufacturer | PortaPow |
| Manufacturer Part Number | PP_PBC1 |
| Model Number | PP_PBC1 |
| Number of Items | 1 |
| Number of Ports | 2 |
| Number of ports | 2 |
| Power Plug Type | No Plug |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specific Uses For Product | 3D Printer, Raspberry Pi |
| Specific uses for product | 3D Printer, Raspberry Pi |
| UPC | 278294696340 027829469634 |
| Unit Count | 1.0 count |
A**Y
Possibly the most honest product on Amazon
There’s no hype with this, it is exactly what it says it is - and they’ve literally made it transparent to prove it. The price perfectly matches the product spec. Didn’t solve my particular problem but that’s an issue with my equipment. Well done for providing an honest, well-priced product that solves a need without having to resort to high-priced, obfuscated snake-oil ! (Or taping over USB pins 🙂) Top marks 👍🏼
M**H
Neat little thing
Bought as a belt-and-braces protection for a 3D printer I am using with a Pi and Octoprint. I don't think I strictly need it, in fact, but it is nice to know this specific problem can't occur. Well-made, does its job, and it's a lot easier than modifying a cable.
A**W
Doesn’t work
It doesn’t work. I’ve got a DAC amp which I use with wired headphones via my iPhone 16. I bought it because the phone was drawing power from my DAC when in use which was killing the battery. I can’t get any audio at all using it. It stops power and data and I only need it to block power.
M**S
Works as intended
I bought this as I had a JetKVM with a faulty splitter cable which would cause power to back feed, this solved the problem as it only lets data through.
J**5
Perfect for JetKVM
I use this on my JetKVM device to make sure power is taken from the USB mains adapter and not the USB socket on the motherboard. Quite a niche use case, but works perfectly!!
J**H
Works as advertised , but did not pass midi data
I bought this to eliminate interference noise , which it did , but while it should pass data , it didn’t pass midi data so was of no use for me sadly, ymmv.
C**T
Does what it says !
My USB dongle was kept turning on on my EV car; Which I found kept trouble shooting the 12v battery causing it to drain a lot and potentially causing ICCU problems. Plugged this and got power sourced from the power plug and all sorted!
R**D
Works as designed
Does a great job isolating power across the USB cable between my OctoPI and 3D printer
Trustpilot
2 days ago
2 weeks ago