---
product_id: 279256049
title: "CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black"
brand: "crj electronics"
price: "$37.60"
currency: USD
in_stock: true
reviews_count: 5
category: "Crj Electronics"
url: https://www.desertcart.us/products/279256049-crj-electronics-4041-full-speed-12v-voltage-step-up-usb
store_origin: US
region: United States of America
---

# 12V step-up power boost USB Type-A plug compatibility Durable sleeved cable design CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black

**Brand:** crj electronics
**Price:** $37.60
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your cooling game with sleek USB-to-fan precision!

## Quick Answers

- **What is this?** CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black by crj electronics
- **How much does it cost?** $37.60 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/279256049-crj-electronics-4041-full-speed-12v-voltage-step-up-usb)

## Best For

- crj electronics enthusiasts

## Why This Product

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

## Key Features

- • **Full Power 12V Boost:** Transforms standard 5V USB into a robust 12V output for maximum fan performance.
- • **Compact & Tangle-Free:** 56cm length with premium coiled packaging ensures easy cable management and instant readiness.
- • **Sleek & Durable Design:** High-density black braided sleeve with reinforced stress relief for long-lasting reliability.
- • **Plug & Play Convenience:** Simply connect to any USB Type-A port—no external power supply needed.
- • **Universal Fan Compatibility:** Seamlessly powers both 3-pin and 4-pin PC fans, including PWM control support.

## Overview

The CRJ Electronics 4041 USB to 3/4-pin fan adapter cable steps up USB 5V to a full 12V output at 0.4A, enabling professional-grade cooling for PC fans and other electronics. Featuring a durable black braided sleeve and universal compatibility with 3-pin and 4-pin fans, it offers a plug-and-play solution to keep your devices cool without bulky power supplies.

## Description

This unique CRJ Electronics USB fan cable allows you to power most standard 3-pin and 4-pin PC fans at full 12V. Ideal for external fan cooling applications.

Review: Do you own a fan that needs more power? Well, that's where this 12 Volt cable comes in. Depending on your use case, extremely useful.
Review: I was surprised at the quality of the cable. The wire gauges are thick and a stiff braided sleeve and heat shrink have been applied. They went the extra mile and put some adhesive where the heat shrink meets the stress relief to anchor the sleeve to the wires. It also has a 4-pin female connector so you can use PWM fans, and not just the 3-pin variety. This cable came coiled, not folded and twisty tied (I hate when they do that, cables take forever to straighten out). Even the resealable bag it came in was thick.

## Features

- This USB adapter cable allows you to power most 3-pin and 4-pin computer fans from a USB type A port.
- Cool down a wide variety of electronics devices that output USB power once powered on (consoles, networking applicances, professional equipment, etc.)
- 12V voltage step-up circuit: Inside the USB housing is a voltage boost circuit that takes 5V and outputs up to 12V 0.4A for full power operation. Additional devices such as fan hubs and speed controller can also be used.
- RoHS Compliant. This cable features all black connectors and a high density sleeve for durability and minimal wire visibility.
- Total cable length (including connectors): 22" / 56cm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QFG6LFR |
| Best Sellers Rank | #63,962 in Computers ( See Top 100 in Computers ) #4,272 in USB Cables |
| Item model number | 4041 |
| Manufacturer | CRJ Electronics |
| Package Dimensions | 14 x 8.31 x 1.5 cm; 18 g |

## Product Details

- **Brand:** CRJ Electronics
- **Cable type:** USB
- **Compatible devices:** Personal Computer
- **Connector type:** Usb
- **Special features:** High Speed

## Images

![CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black - Image 1](https://m.media-amazon.com/images/I/71SD-kgDm6L.jpg)
![CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black - Image 2](https://m.media-amazon.com/images/I/71XLpTlYAkL.jpg)
![CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black - Image 3](https://m.media-amazon.com/images/I/81-4JSKPJBL.jpg)
![CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black - Image 4](https://m.media-amazon.com/images/I/81i-Fi7wiGL.jpg)
![CRJ Electronics 4041 Full Speed 12V Voltage Step-Up USB to 3-Pin and 4-Pin PC Fan Sleeved Power Adapter Cable,Black - Image 5](https://m.media-amazon.com/images/I/81mXg0YXxjL.jpg)

## Questions & Answers

**Q: Can you use this on a usb power source that is 12v ?**
A: This will not negotiate 12v from a USB charger. It will always draw 5v from the charger and boost to 12v

**Q: Can this be used to send ASCII commands from a PC to hdmi multi viewer product?**
A: I don't think so. This is for powering a PC fan using a USB power source. It's only 3 pins as well so it lacks extra data communication.

**Q: Will this work with a 12v 0.12a fan? its a be quiet shadow wings 2 120mm fan.**
A: It should work with any 12v fan. I had no issue using it on a similar fan.

**Q: Does the step up circuit have a frequency noise issue?**
A: I never noticed anything. I had an ITX motherboard in an enclosed space so I used this and an exhaust fan. Sounded like a normal 120mm fan

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by S***T on 30 November 2021*

Do you own a fan that needs more power? Well, that's where this 12 Volt cable comes in. Depending on your use case, extremely useful.

### ⭐⭐⭐⭐⭐ Review
*by I***E on 1 June 2021*

I was surprised at the quality of the cable. The wire gauges are thick and a stiff braided sleeve and heat shrink have been applied. They went the extra mile and put some adhesive where the heat shrink meets the stress relief to anchor the sleeve to the wires. It also has a 4-pin female connector so you can use PWM fans, and not just the 3-pin variety. This cable came coiled, not folded and twisty tied (I hate when they do that, cables take forever to straighten out). Even the resealable bag it came in was thick.

### ⭐⭐⭐⭐⭐ Review
*by F***S on 21 April 2025*

Does exactly what I needed — powered my PC fans from a USB port without a hitch. Clean, efficient, and well made!

## Frequently Bought Together

- CRJ 12V Step-Up USB Fan Power Adapter Cable - 24-inch (60cm), Black Sleeved - Full Fan Speed Adapter for 3-Pin/4-Pin PC Cooling Fans
- Noctua NA-FC1, 4-Pin PWM Fan Controller (Black)
- Noctua NF-P12 redux-1700 PWM, High Performance Cooling Fan, 4-Pin, 1700 RPM (120mm, Grey)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-09*