# Direct Attach Breakout Cable BlueOptics R8M52A-BL 400GBASE-CR8 QSFP-DD to 2×200GBASE-CR4 QSFP56, passive, 2 m, AWG26

**URL:** https://aio.lv/en/product--blueoptics-r8m52a-bl--12256474
**Data updated:** 2026-04-14 22:29 (EEST)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** R8M52A-BL
**EAN:** 4063232350912
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 183.49 €
**Prices and availability valid until:** 2026-08-26 23:59
**Price without VAT (21%):** 151.64 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-r8m52a-bl--12256474

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.08.2026 | free |
| Pickup points | 27.08.2026 | 1.79 EUR |
| Courier delivery to door | 27.08.2026 | 4.99 EUR |

## Summary description

Passive Direct Attach Breakout cable BlueOptics R8M52A-BL converts a 400GBASE-CR8 QSFP-DD interface to two 200GBASE-CR4 QSFP56 ports. Twin-ax copper assembly with AWG26 conductors and 2 meter length for short-reach interconnects in data centers and network racks. Suitable for switch-to-switch or switch-to-server links requiring 400G split to 2×200G without optics.

## Long description

Passive Direct Attach Breakout cable BlueOptics R8M52A-BL converts a single 400GBASE-CR8 QSFP-DD interface into two 200GBASE-CR4 QSFP56 connections. The cable uses twin-ax copper with AWG26 conductors and has a 2-meter length, designed for short-reach interconnects inside data centres, server racks and network closets. This passive assembly provides a direct electrical path for 400G-to-2×200G split applications where optical transceivers are not required.
Advantages
The BlueOptics R8M52A-BL offers a simple, low-latency and energy-efficient solution for splitting 400G QSFP-DD ports into two 200G QSFP56 endpoints. Its passive twin-ax construction reduces power consumption compared with active or optical alternatives and eliminates the need for separate transceivers. The 2 m length and AWG26 conductors are suitable for short-distance links commonly found in rack-to-rack or shelf-to-shelf connections.
Suitable for
 Short-reach switch-to-switch connections within the same rack or adjacent racks
 Switch-to-server links that require splitting a 400G port into two 200G ports
 High-density top-of-rack deployments where direct-attach, low-power cabling is preferred
When it may not be suitable
This passive breakout cable is intended for short-reach electrical interconnects; it is not suitable for long-reach connections or where fibre optics are required. It also does not provide media conversion or active signal conditioning, so environments that require extended reach, active equalization, or specific optical transceiver functionality should use appropriate optical modules or active cabling instead.
Key specifications
 Interface: QSFP-DD (400GBASE-CR8) to 2 × QSFP56 (200GBASE-CR4)
 Type: Passive direct attach breakout cable (twin-ax copper)
 Conductor size: AWG26
 Length: 2 metres
 Use case: Short-reach, rack-to-rack or within-rack interconnects
 Power: Passive (no active electronics)
How to use
Install the BlueOptics R8M52A-BL by inserting the QSFP-DD plug into the 400G port on the source device and plugging the two QSFP56 ends into the target devices or breakout ports. Ensure that both ends are fully seated and that devices are powered off or follow hot-plug guidance from the equipment vendor where applicable. Verify link status and configure port speeds and lanes on connected switches or servers as required by your network operating system.
What to consider before purchase
 Confirm that your devices support passive QSFP-DD to QSFP56 breakout functionality and the specific 400G/200G electrical standards
 Ensure the 2 m length and AWG26 twin-ax construction meet your rack layout and signal-budget requirements
 Check vendor compatibility and any port configuration or firmware requirements on switches and servers
Usage recommendations
Use this passive breakout cable for short, stable connections inside racks or between adjacent racks. Avoid tight bends and compressive stress on the cable, maintain recommended bend radius, and route the cable to minimize interference. For longer distances or environments requiring active signal conditioning, select optical modules or active DAC solutions instead.

## FAQ

### How much does the BlueOptics R8M52A-BL 400G QSFP-DD to 2×200G QSFP56 cable cost, and is it available for purchase?

The price is 183.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 24.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 BlueOptics 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 BlueOptics 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