# Fibre optic cable BlueOptics SFP2121BU5MK 5 m LC OS2 9 µm

**URL:** https://aio.lv/en/product--blueoptics-sfp2121bu5mk--4469504
**Data updated:** 2026-02-25 16:34 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFP2121BU5MK
**EAN:** 4063232619316
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 12.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfp2121bu5mk--4469504

## 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

The BlueOptics SFP2121BU5MK is a 5 m fibre optic cable designed for high-speed data transmission. It features LC connectors and OS2 fibre type with a core diameter of 9 µm, ensuring reliable performance for networking applications.

## Long description

The BlueOptics SFP2121BU5MK 5 m LC OS2 9 µm is a single-mode fibre optic patch cable designed for high-speed data transmission between network devices. It features LC simplex connectors on both ends and OS2 / G.657.A1 single-mode fibre with a 9 µm core diameter. The cable is supplied in a 5 metre length with a yellow LSZH jacket and is intended for connecting patch panels, optical transceivers and other fibre ports that require LC-LC single-mode links.
Advantages
This 5 m LC-LC single-mode cable provides low attenuation and high return loss characteristics suitable for 1310 nm and 1550 nm signal transmission. The LSZH jacket reduces smoke and avoids halogen release in case of fire, meeting common industry safety standards. Connectors use zirconia ceramic ferrules and are manufactured to provide reliable mating cycles; factory testing with interferometer and OTDR is performed and measurement protocols for insertion loss and return loss are included with each cable.
Suitable for
 Connecting optical transceivers in switches, routers and servers
 Patch panel to patch panel or patch panel to transceiver links
 Single-mode LAN, data centre and telecom backbone connections
 Short horizontal or vertical interconnects inside racks or cabinets
Key specifications
 Fibre type: Single-mode OS2 (G.657.A1 / E9/125 µm)
 Core diameter: 9 µm
 Connector type: LC to LC, simplex
 Length: 5 metres
 Jacket: LSZH (low smoke, zero halogen), yellow
 Designed wavelengths: 1310 nm and 1550 nm
 Typical attenuation value: approximately 0.4 dB/km (manufacturer specification)
 Tested with interferometer and OTDR; measurement protocol supplied
How to use
Unpack the BlueOptics 5 m LC-LC single-mode cable and remove protective caps from the LC connectors before insertion. Align the LC connector latch with the device port and push gently until it clicks to ensure a secure connection. Avoid tight bends and kinks in the fibre; maintain a minimum bend radius as recommended for single-mode fibre to prevent increased attenuation. When disconnecting, depress the latch and pull the connector straight out to avoid damaging the ferrule.
Usage recommendations
For optimal performance, route the cable away from mechanical stress and electromagnetic interference sources, keep connector endfaces clean using appropriate fibre cleaning tools, and store spare cables with dust caps fitted. Use the supplied test protocol to verify insertion loss and return loss after installation. If a different polish type (UPC or APC) is required for system compatibility, select the suitable variant at time of ordering.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.03 kg |
| Certification | IEC-61034,IEC-754-1, IEC 60332-1, IEC 60332-3, IEC/EN 60950 |
| Full duplex | No |
| Package weight | 30 g |
| Cable length | 5 m |
| Product colour | Yellow |
| Connector material | Ceramic |
| Connector 1 | LC |
| Connector 2 | LC |
| Cable diameter | 2 mm |
| Fiber mode structure | Single-mode |
| Core diameter | 9 µm |
| Cladding diameter | 125 µm |
| Jacket material | Low smoke zero halogen (LSZH) |
| Connector 1 gender | Male |
| Connector 2 gender | Male |
| Quantity per pack | 1 pc(s) |
| Wavelengths supported | 1310 |
| Fibre optic type | OS2 |
| Doesn't contain | Halogen |
| Connector polish type | UPC |
| Compliance certificates | RoHS |

## FAQ

### How much does the Fibre optic cable BlueOptics SFP2121BU5MK cost, and is it available for purchase?

The price is 15.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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

## Image

https://aio.lv/img/cache/product/4469504/64297881_large.webp