# Extralink SFP to RJ45 Module SFP 1.25G (1250 Mbps), 100/1000BASE‑T, 100 m copper transceiver

**URL:** https://aio.lv/en/product--extralink-ex2251--701695
**Data updated:** 2026-03-27 13:12 (EET)
**Category:** Network Media Converters
**Manufacturer:** Extralink
**Manufacturer code:** EX.2251
**EAN:** 5902560362251
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 16.52 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--extralink-ex2251--701695

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Copper SFP to RJ45 transceiver by Extralink supporting 1.25 Gbps (1250 Mbps) and 100/1000BASE‑T Ethernet. Designed for insertion into SFP ports to provide a copper RJ45 uplink up to 100 m. Typical power consumption 1.05 W, FCC certified. Suited for switches, routers and media converters to connect copper Ethernet links in LAN and access networks.

## Long description

The Extralink SFP to RJ45 Module is a compact copper transceiver designed to convert an SFP slot into a 100/1000BASE‑T RJ45 uplink. Supporting a maximum data rate of 1.25 Gbit/s (1250 Mbps) and link distances up to 100 m over Category 5/5e copper cabling, the module enables a copper Ethernet connection from switches, routers or media converters without requiring dedicated copper ports. The transceiver follows Gigabit Ethernet standards and supplies standard SFP serial ID information accessible via the SFP MSA EEPROM interface. Its fully metallic housing reduces electromagnetic interference and the module operates with low typical power consumption around 1.05 W.
Advantages
The module provides a straightforward way to add RJ45 copper connectivity to devices with SFP slots, supporting both Fast Ethernet and Gigabit Ethernet links. Compatibility with most Gigabit SFP ports and adherence to standard SFP MSA identification simplifies installation and monitoring. Compact metal construction offers mechanical robustness and reduced EMI, while the low power draw makes it suitable for dense deployments in racks and access equipment.
Suitable for
Adding a copper uplink to switches or routers that only have SFP slots
Connecting network equipment to existing Cat5/Cat5e copper cabling within a 100 m reach
Media converters or access node installations requiring RJ45 ports from SFP interfaces
Key specifications
Maximum data transfer rate: 1250 Mbit/s (1.25 Gbit/s)
Supported Ethernet standards: 100BASE‑T, 1000BASE‑T (Gigabit Ethernet)
Maximum copper link distance: 100 m over Category 5/5e cable
Interface: SFP form factor to RJ45 (copper) port
Power consumption: typical 1.05 W
EEPROM: SFP MSA compatible serial ID accessible via 2‑wire interface
Housing: full metal enclosure for reduced EMI
How to use
Insert the Extralink SFP to RJ45 module into an available SFP slot on the target switch, router or media converter while the equipment is powered down or following the host device vendor’s hot‑swap guidance. Connect a Category 5/5e copper cable to the RJ45 port and establish link negotiation with the connected device. Verify link status and speed through the host device management interface or LEDs; the module exposes standard SFP serial ID information for inventory and monitoring tools that read the EEPROM.
Usage recommendations
For reliable Gigabit performance, use Category 5e or higher cabling and keep copper runs under 100 m. Confirm host device compatibility with third‑party SFP copper modules where applicable and ensure firmware or vendor restrictions do not prevent link establishment. Maintain proper ventilation in dense installations to keep module temperature within manufacturer operating ranges.

## Specifications

| Feature | Value |
|---|---|
| Interface type | SFP |
| Ethernet LAN | Yes |
| Maximum operating temperature | 70 °C |
| Number of products included | 1 pc(s) |
| SFP transceiver type | Copper |

### Network

| Feature | Value |
|---|---|
| Ethernet interface type | Fast Ethernet, Gigabit Ethernet |
| Maximum data transfer rate | 1250 Mbit/s |
| Copper ethernet cabling technology | 100BASE, 1000BASE |

### Performance

| Feature | Value |
|---|---|
| Maximum transfer distance | 100 m |

### Power

| Feature | Value |
|---|---|
| Power consumption (typical) | 1.05 W |

### Certificates

| Feature | Value |
|---|---|
| Certification | FCC |

### Sustainability

| Feature | Value |
|---|---|
| Sustainability certificates | CE, RoHS |

## FAQ

### How much does the Extralink SFP to RJ45 Module SFP 1.25G cost, and is it available for purchase?

The price is 19.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 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 14.07.2026 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, Bank cards on-line, Apple Pay, Google Pay. 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 Extralink 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 Extralink 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: maximum data transfer rate, maximum transfer distance, ethernet interface type, 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/701695/54592401_large.webp