---
product_id: 268720688
title: "OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution"
brand: "owc"
price: "¥112720"
currency: JPY
in_stock: true
reviews_count: 6
category: "Owc"
url: https://www.desertcart.jp/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot
store_origin: JP
region: Japan
---

# 40Gb/s ultra-fast transfer 85W notebook charging power Daisy-chain up to 5 devices OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution

**Brand:** owc
**Price:** ¥112720
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock your laptop’s full potential with Mercury Helios 3S — power, speed, and expansion in one sleek package!

## Quick Answers

- **What is this?** OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution by owc
- **How much does it cost?** ¥112720 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot)

## Best For

- owc enthusiasts

## Why This Product

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

## Key Features

- • **Power Through Your Day:** 85W charging keeps your laptop powered while you work—no downtime, no hassle.
- • **Secure & Expandable Setup:** Locking 12V power connector and daisy-chain up to 5 Thunderbolt devices for ultimate flexibility.
- • **8K DisplayPort 1.4 Support:** Drive stunning ultra-high-definition visuals for presentations or creative projects.
- • **Dual Thunderbolt USB-C Ports:** Connect multiple high-performance devices simultaneously without compromise.
- • **Blazing 40Gb/s Thunderbolt 3 Speed:** Experience near-instant data transfers that keep your workflow lightning fast.

## Overview

The Mercury Helios 3S is a premium single-slot PCIe expansion chassis that leverages Thunderbolt 3’s 40Gb/s bandwidth to connect high-performance PCIe cards to laptops and desktops. Featuring dual Thunderbolt USB-C ports, 85W charging, and DisplayPort 1.4 for 8K displays, it supports daisy-chaining up to 5 devices and includes a secure locking power connector. Compatible with macOS 14 Sonoma and Windows 11, it’s designed for professionals demanding speed, power, and versatility in a compact, metal enclosure.

## Description

Mercury Helios 3S The powerful expansion solution that adds an external PCIe slot to your Thunderbolt 3 equipped laptop, space-constrained Mac, or Windows PC desktop.

Review: Works with Avid HD Native pie cards (OS X) - Bought to use with an iMac Pro to house an Avid HD Native card, it has worked flawlessly from day one even though it's not on Avid's supported list. Not single complaint and very well built, even supplies data to two external monitors with a single hiccup.
Review: très bon matériel - Reçu rapidement et fonctionne très bien. Ne chauffe pas et prise en charge de la carte vidéo sans problème. Raccordé sur un mini ordinateur sur sa prise thunderbolt 4, tout fonctionne parfaitement.

## Features

- Lightning-fast 40Gb/s transfer speeds: (2) Thunderbolt (USB-C) ports
- See more: DisplayPort 1.4 for connecting up to an 8K display
- Charge while working: 85W of notebook charging
- Secure workflow: locking 12V power connector
- Maximum potential: daisy-chain up to 5 additional Thunderbolt devices

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B083V3DKCN |
| Best Sellers Rank | 56,745 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 525 in Computer Cases |
| Brand | OWC |
| Brand Name | OWC |
| Colour | Black |
| Compatible Devices | Laptops, Personal Computer |
| Compatible devices | Laptops, Personal Computer |
| Country of Origin | Taiwan |
| Customer Reviews | 4.5 out of 5 stars 74 Reviews |
| Data Transfer Rate | 40 Gigabits Per Second |
| Enclosure Material | Metal |
| Hardware Interface | Thunderbolt |
| Hardware interface | Thunderbolt |
| Item Dimensions L x W x H | 14.3L x 14.3W x 8.2H centimetres |
| Item Weight | 1.7 Kilograms |
| Manufacturer | OWC |
| Manufacturer Part Number | HELIOS3S |
| Minimum Required Operating System Version | Mac OS 14 Sonoma, Windows 11 |
| Model Number | OWCHELIOS3S |
| Number of Ports | 3 |
| Operating System | Windows, macOS |
| Product Features | Play, Plug |
| Product Warranty | 2 year manufacturer |
| Special feature | Play, Plug |
| Total USB Ports | 2 |
| Total USB ports | 2 |
| UPC | 810586032773 |

## Product Details

- **Brand:** OWC
- **Colour:** Enclosure
- **Hardware interface:** Thunderbolt
- **Special feature:** Play, Plug
- **Compatible devices:** Laptops, Personal Computer

## Images

![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 1](https://m.media-amazon.com/images/I/51qnp1z4rRL.jpg)
![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 2](https://m.media-amazon.com/images/I/51AfhOiURRL.jpg)
![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 3](https://m.media-amazon.com/images/I/61W4MVAfDOL.jpg)
![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 4](https://m.media-amazon.com/images/I/41I3bgq2EcL.jpg)
![OWC Mercury Helios 3S Thunderbolt 3 (40Gb/s) Single Slot PCIe Card Expansion Solution - Image 5](https://m.media-amazon.com/images/I/41JKwlETjfL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does it support daisy chaining another Thunderbolt 3 device to the 2nd port? e.g. A 10gbe Thunderbolt network adapter.**
A: Hello. Yes, the OWC Mercury Helios 3S will allow or thunderbolt device to be daisy-chained off the second port of this chassis.

**Q: Can you install a gpu card like nvidia into this?**
A: Hello. No this unit does not support GPU's.

**Q: is this thunderbolt 4 compatible?**
A: Hello. This Mercury Helios 3S is a Thunderbolt 3 device, but can be used in a Thunderbolt 4 port as 3 is backwards compatible.

**Q: Will this work with bootcamp windows 10/11 for a lynx aes16e interface card?**
A: I bought this for my vive wireless pcie wigic card and just googled yours. From what I see so long as you have a thunderbolt 3 port it should work.vyour card should fit. However from the looks of the googled image you may have to keep the casing off. No loss it will still work just no shell.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works with Avid HD Native pie cards (OS X)
*by C***G on 5 November 2021*

Bought to use with an iMac Pro to house an Avid HD Native card, it has worked flawlessly from day one even though it's not on Avid's supported list. Not single complaint and very well built, even supplies data to two external monitors with a single hiccup.

### ⭐⭐⭐⭐⭐ très bon matériel
*by R***O on 13 December 2023*

Reçu rapidement et fonctionne très bien. Ne chauffe pas et prise en charge de la carte vidéo sans problème. Raccordé sur un mini ordinateur sur sa prise thunderbolt 4, tout fonctionne parfaitement.

### ⭐⭐⭐⭐⭐ OWC Mercury Helios 3S
*by K***K on 1 March 2023*

Arrivato prima del tempo previsto si presenta ottimo qualitativamente ed esteticamente!

## Frequently Bought Together

- OWC Mercury Helios 3S Thunderbolt 3 PCIe Expansion Solution
- Cable Matters [Intel Certified] 40Gbps Thunderbolt 4 Cable 3.3ft with 8K Video and 240W Charging - 1m, Compatible with USB4, Thunderbolt 3 Cable and USB-C

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**Shop now:** [https://www.desertcart.jp/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot](https://www.desertcart.jp/products/268720688-owc-mercury-helios-3s-thunderbolt-3-40gb-s-single-slot)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-22*