# BlueOptics K2Q21A-BL InfiniBand Fibre Optic Cable 3 m SFP+ Male/Male

**URL:** https://aio.lv/en/product--blueoptics-k2q21a-bl--5038530
**Data updated:** 2026-03-07 15:11 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** K2Q21A-BL
**EAN:** 4063232010397
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 59.49 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 49.17 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-k2q21a-bl--5038530

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.07.2026 | free |
| Pickup points | 27.07.2026 | 1.99 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

The BlueOptics K2Q21A-BL is a 3 m InfiniBand fibre optic cable with SFP+ connectors. It features male-to-male connectivity, ensuring reliable data transmission for high-speed networking applications.

## Long description

The BlueOptics K2Q21A-BL InfiniBand Fibre Optic Cable 3 m SFP+ Male/Male is a 3-meter high-speed direct attach cable with SFP+ connectors designed for short-range data links. It provides a male-to-male SFP+ interface for direct connectivity between compatible network devices and supports InfiniBand and 10G-class data transfer applications where SFP+ transceivers and ports are used. The cable is intended for reliable rack-to-rack or within-rack connections in data centers and network equipment rooms.
Advantages
The cable offers a compact, passive direct-attach format that simplifies short-distance interconnections without additional transceiver modules. The SFP+ male-to-male connectivity ensures straightforward installation into SFP+ ports and reduces the need for separate optical transceivers. Manufactured to align with industry MSA standards, the product is suitable for environments that require consistent 10G-class performance and interoperability with hardware that supports the corresponding direct-attach form factor and signaling.
Suitable for
 Short-range rack-to-rack connections in data centers
 Direct links between switches, routers and storage systems with SFP+ ports
 InfiniBand and 10G Ethernet/FCoE interfaces on supported hardware
Key specifications
 Cable type: Direct attach / twinax-style direct connection with SFP+ male connectors
 Length: 3 m
 Connector type: SFP+ male to SFP+ male
 Supported protocols: InfiniBand and 10G-class data applications (Ethernet, FCoE, Fibre Channel where supported)
 Form factor: Passive direct-attach cable for short-distance interconnects
How to use
Insert each SFP+ connector into the corresponding SFP+ port on the two devices to be linked, ensuring the latches engage and the connectors are fully seated. Use the cable for short-distance links within racks or between adjacent racks, taking care to route the cable without tight bends and to avoid placing it under mechanical strain. Confirm that the connected hardware supports passive direct-attach twinax cabling and that firmware or vendor compatibility requirements are met before placing the link into production.
Usage recommendations
For reliable operation, verify device compatibility with SFP+ passive direct-attach cables and follow rack-cabling best practices: avoid sharp bends, maintain adequate airflow around equipment, and label both ends of the cable. If vendor compatibility or firmware restrictions exist, consult the hardware manufacturer’s documentation or request a test sample prior to deployment.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.13 kg |
| Package weight | 130 g |
| Cable length | 3 m |
| Data transfer rate | 10 Gbit/s |
| Product colour | Black, Silver |
| Connector 1 | SFP+ |
| Connector 2 | SFP+ |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand Fibre Optic Cable BlueOptics K2Q21A-BL cost, and is it available for purchase?

The price is 59.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 195 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 22.07.2026 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

## Image

https://aio.lv/img/cache/product/5038530/64336830_large.webp