---
product_id: 359343622
title: "USB Power Blocker - Stops Charging, Allows Data (Single Pack)"
brand: "portapow"
price: "B/.21"
currency: PAB
in_stock: true
reviews_count: 13
category: "Porta Pow"
url: https://www.desertcart.com.pa/products/359343622-usb-power-blocker-stops-charging-allows-data-single-pack
store_origin: PA
region: Panama
---

# Blocks 5V power line Maintains USB 2.0 data transfer (up to 480 Mbps) Compact 4-inch USB-A male to female adapter USB Power Blocker - Stops Charging, Allows Data (Single Pack)

**Brand:** portapow
**Price:** B/.21
**Availability:** ✅ In Stock

## Summary

> ⚡ Data flows, power stops — the smart USB shield for pros.

## Quick Answers

- **What is this?** USB Power Blocker - Stops Charging, Allows Data (Single Pack) by portapow
- **How much does it cost?** B/.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/359343622-usb-power-blocker-stops-charging-allows-data-single-pack)

## Best For

- portapow enthusiasts

## Why This Product

- Trusted portapow brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **USB 2.0 Speed Support:** Enjoy reliable data transfer up to 480 Mbps without power interference.
- • **Plug & Play Simplicity:** No cable hacking or device modification needed—just connect and go.
- • **Compact & Durable Design:** Sleek red adapter with gold connectors fits perfectly in any workspace.
- • **Engineered for Precision:** Ideal for 3D printers & Raspberry Pi setups where power causes glitches.
- • **Power Blocked, Data Uninterrupted:** Seamlessly stops power flow while keeping your data streams alive.

## Overview

The PortaPow USB Power Blocker is a specialized USB-A male-to-female adapter that disconnects the 5V power line while maintaining USB 2.0 data connectivity up to 480 Mbps. Perfect for niche applications like 3D printers and Raspberry Pi devices where power delivery can cause operational issues, this compact 4-inch adapter offers a hassle-free, plug-and-play solution to prevent unwanted power transfer without sacrificing data integrity.

## Description

The PortaPow USB Power Blocker is a specialized USB-A male to female adapter designed to halt power transfer while maintaining data connectivity. Ideal for applications like 3D printers and Raspberry Pi where power can cause unwanted effects, this adapter disconnects the 5V line while keeping D+, D-, and GND connected for USB 2.0 data transfer. It's a single pack, red, rectangular item with a gold connector, and supports CE specifications. Measuring 4 inches in length, it's compact and convenient for indoor use. Supports data transfer rates up to 480 Mbps.

Review: Does what it says on the tin. - Does exactly what it says is does. Prevents 5v power from reaching the device. Really only needed when dealing with self-powered devices that don't implement USB properly, which either try to backpower the host, or partially start only the 5v components. In the past I'd carve up a cable, and cut the 5v line, or modify the target device itself, and this is a bit easier of a solution. Things work well at 12Mbps (USB 1 "Full" speed). I have not tested with any 2.x devices, though the traces are pretty short, I would expect no issues. (All of my easily available 2.x devices are bus-powered, and they won't work for obvious reasons).
Review: Power blocker worked as expected. Priced right. - Just what I needed to prevent my device from powering a host device I needed to access. Data continued to be available from my device. Good price.

## Features

- This is NOT a data blocker, see PortaPow's other products if that is what you need
- This is a USB-A male to female adaptor which has the D+, D- and 0V (GND) connected but the 5V disconnected, so power cannot pass through.
- Useful for specialist applications such as 3D Printers and Raspberry Pi where providing power results in undesirable effects
- Note a power blocker is not compatible with smartphones, tablets and many other devices. Please read the reviews to see situations where it does and does not work.
- Supports USB 2.0 Data Transfer.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B094FYL9QT |
| Best Sellers Rank | #997 in USB Cables |
| Date First Available | March 12, 2016 |
| Item Weight | 0.704 ounces |
| Item model number | PP_PBC1 |
| Manufacturer | PortaPow |
| Package Dimensions | 3.03 x 1.97 x 0.43 inches |

## Product Details

- **Brand:** PortaPow
- **Color:** Red
- **Compatible Devices:** PC
- **Connector Type:** USB Type A
- **Item Weight:** 0.02 Kilograms

## Images

![USB Power Blocker - Stops Charging, Allows Data (Single Pack) - Image 1](https://m.media-amazon.com/images/I/51YnuSrATxL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is the data wires usb 3 or is there another product for usb3 that does this?**
A: This device does NOT pass the USB 3.x data lines, only the D+/D- used for USB 1 and USB 2.
I do not know of a device which passes USB 3.x data lines only.  Doesn't mean that it doesn't exist, but I have never seen one - ever.

**Q: Would this help on a usb keyboard(aluminum) when I walk around house electrostatic discharge when I touch it kb has to plugged in ?**
A: No, this blocks power output from the USB port. As USB keyboards are powered by this voltage output, they keyboard wouldn't work unless it has an ac adapter, or used batteries to operate. The best use case I have found for these power blockers is to keep the voltage from away from the mainboard in a 3d printer so it is able to fully power off when the power supply is switched off.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does what it says on the tin.
*by L***O on December 16, 2025*

Does exactly what it says is does. Prevents 5v power from reaching the device. Really only needed when dealing with self-powered devices that don't implement USB properly, which either try to backpower the host, or partially start only the 5v components. In the past I'd carve up a cable, and cut the 5v line, or modify the target device itself, and this is a bit easier of a solution. Things work well at 12Mbps (USB 1 "Full" speed). I have not tested with any 2.x devices, though the traces are pretty short, I would expect no issues. (All of my easily available 2.x devices are bus-powered, and they won't work for obvious reasons).

### ⭐⭐⭐⭐⭐ Power blocker worked as expected. Priced right.
*by S***N on January 16, 2026*

Just what I needed to prevent my device from powering a host device I needed to access. Data continued to be available from my device. Good price.

### ⭐⭐⭐⭐⭐ Works perfectly for my wireless Carplay adapter.
*by G***M on October 8, 2025*

Works perfectly for my wireless Carplay adapter. The car supplies power to the USB/data port even if the car is off so my phone would connect/stay connected to the adapter anytime I was near it. This dongle lets the data through and I use a USB splitter to get the power from the lighter socket which is not powered when the car is off. Kind of workaround but it works.

## Frequently Bought Together

- PortaPow USB Power Blocker - Stops Charging, Allows Data (Single Pack)
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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-03-12*