# Direct Attach Cable BlueOptics SFP28 25GBASE-CR 1m (844474-B21)

**URL:** https://aio.lv/en/product--blueoptics-844474-b21-bl--5038643
**Data updated:** 2026-03-07 15:11 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** 844474-B21-BL
**EAN:** 4063232098920
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 58.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 48.75 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-844474-b21-bl--5038643

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

BlueOptics SFP28 Direct Attach Cable, model 844474-B21, is a 1-meter passive copper twinax solution for 25GBASE-CR connections. Designed for SFP28 ports, it provides a direct, low-latency link between switches, NICs and servers for short-reach 25 Gigabit Ethernet applications in data centers and network racks.

## Long description

BlueOptics SFP28 Direct Attach Cable 25GBASE-CR 1m is a passive copper twinax assembly engineered for short-reach 25 Gigabit Ethernet links. The assembly is built for use with SFP28 ports and provides a direct electrical connection between switches, network interface cards and servers in data center racks. With a 1 meter length and SFP28 form factor, this Direct Attach Cable supports 25GBASE-CR signaling for low-latency, cost-effective interconnects where fiber is not required.
Advantages
This 1m BlueOptics SFP28 direct attach cable delivers predictable electrical performance for 25GBASE-CR applications, offering a compact, single-cable solution that eliminates the need for separate transceivers and patch cords. The passive twinax design lowers power consumption compared with active optics and reduces latency by maintaining an electrical link. The cable’s SFP28-compatible connectors ensure straightforward plug-and-play deployment in compatible ports and simplify inventory by using a standardized form factor.
Suitable for
 Short-reach 25 Gigabit Ethernet connections between top-of-rack switches and aggregation switches
 Direct links from servers or NICs to switches in high-density racks
 Spare or replacement interconnects in data center patching and cabling systems
 Environments prioritizing low latency and reduced power consumption for intra-rack links
Key specifications
 Connector type: SFP28-compatible twinax copper plugs
 Data rate: 25 Gigabit Ethernet (25GBASE-CR)
 Length: 1 meter
 Cable type: Passive twinax copper
 Application: Short-reach, intra-rack networking
 Latency profile: Low latency electrical interconnect
How to use
Insert each SFP28 connector into the corresponding SFP28 port on the network devices until the latch secures. Ensure both ends are fully seated and that ports are compatible with passive SFP28 direct attach cables. No additional configuration is required at the physical layer; devices will negotiate link parameters according to 25GBASE-CR standards. Inspect connectors for contamination before insertion and route the cable to avoid sharp bends that could stress the assembly.
Usage recommendations
Use the cable for short, direct electrical connections within a single rack or between adjacent racks. Verify switch and NIC compatibility with passive SFP28 twinax cables and confirm supported data rates in device documentation. For longer distances or where optical isolation is required, consider optical transceivers and fiber cabling instead.

## FAQ

### How much does the BlueOptics SFP28 Direct Attach Cable 25G 1m cost, and is it available for purchase?

The price is 58.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 380 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 23.07.2026 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