# Thunderbolt 3 cable LMP 21938, USB-C male–male, optical, 25 m, 40 Gbit/s, black

**URL:** https://aio.lv/en/product--lmp-21938--11110354
**Data updated:** 2026-03-07 18:15 (EET)
**Category:** USB Data Cables
**Manufacturer:** LMP
**Manufacturer code:** 21938
**EAN:** 5715063285855
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Optical Thunderbolt 3 cable from LMP (model 21938) with USB‑C male-to-male connectors, 25 m length and 40 Gbit/s data rate. Designed for high-speed data transfer and video signal transmission over long distances without electrical interference. Suitable for connecting compatible laptops, docks, storage devices and monitors in studio, AV or workstation environments.

## Long description

The LMP Thunderbolt 3 cable 21938 is an optical USB-C male-to-male cable with a 25 m length and 40 Gbit/s bi-directional bandwidth. Designed for long-distance connectivity, it carries Thunderbolt 3 signals including PCI Express and DisplayPort (DP Alt Mode) without electrical interference, providing low-latency transfer and accurate time synchronization for professional audio and video workflows. This active optical cable supports daisy-chaining of multiple Thunderbolt devices and operates using USB-C connectors in a 2-lane, full-duplex Thunderbolt 3 configuration. The cable is black and intended for use in studio, AV or workstation environments where high data rate and stable video transmission over distance are required.
Advantages
The optical construction enables consistent 40 Gbit/s throughput across the full 25 m length while avoiding the signal degradation and electromagnetic interference typical of long copper runs. Support for PCI Express and DisplayPort over Thunderbolt 3 ensures compatibility with storage arrays, docks and external GPUs, and the low latency with accurate time synchronization makes it suitable for professional audio and video tasks. The active design allows daisy-chaining of Thunderbolt devices and maintains full-duplex operation.
Suitable for
 Connecting Thunderbolt-compatible laptops to monitors or docking stations over long distances
 Linking external storage arrays and RAID enclosures in studio or post-production setups
 Integrating audio/video interfaces and recorders that require low-latency synchronization
 Daisy-chaining multiple Thunderbolt 3 devices such as docks, displays and storage
Key specifications
 Connector type: USB-C (male) to USB-C (male), Thunderbolt 3 compatible
 Cable type: active optical cable
 Length: 25 m
 Maximum data rate: 40 Gbit/s bi-directional
 Protocol support: Thunderbolt 3, PCI Express, DisplayPort (DP Alt Mode)
 Operation: 2-lane, full-duplex Thunderbolt 3
 Typical power consumption: 900 mW at 5 V operation voltage
 Operating ambient temperature: 0 to 50 °C
 Does not carry USB data (USB-C USB signals) and does not provide Power Delivery
How to use
Connect each end of the Thunderbolt 3 cable to the USB-C Thunderbolt ports of the source and destination devices. For daisy-chaining, connect from the host to the first device, then continue to subsequent Thunderbolt devices using additional compatible Thunderbolt cables or ports. Ensure connected devices support Thunderbolt 3 and the required protocols (DisplayPort or PCIe) for your use case. Operate the cable within the specified ambient temperature range and provide appropriate ventilation for connected hardware. No special drivers are required for basic Thunderbolt 3 functionality beyond the host device's standard Thunderbolt support.
Usage recommendations
Use the cable only with Thunderbolt 3‑capable USB‑C ports; avoid relying on it for USB-only devices or for charging since it does not transmit USB data or Power Delivery. Route the cable to avoid tight bends and sharp kinks, keep it away from strong heat sources, and verify device compatibility for DisplayPort and PCIe features before deployment in professional AV or storage systems.

## Specifications

| Feature | Value |
|---|---|
| Data transfer rate (max) | 40 Gbit/s |

### Features

| Feature | Value |
|---|---|
| Connector 1 | Male |
| Connector 2 | Male |
| Product colour | Black |
| Thunderbolt version | 3 |

### Packaging content

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

### Weight & dimensions

| Feature | Value |
|---|---|
| Cable length | 25 m |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All LMP products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized LMP service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: connector 1, connector 2, cable length, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/11110354/61799379_large.webp