# SFP Copper Transceiver Teltonika PR4JR20K 1.25 Gbps, RJ‑45, 100 m, metal housing

**URL:** https://aio.lv/en/product--teltonika-networks-pr4jr20k--11573683
**Data updated:** 2026-03-20 21:20 (EET)
**Category:** Network Media Converters
**Manufacturer:** Teltonika Networks
**Manufacturer code:** PR4JR20K
**EAN:** 4779051843350
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 37.99 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 31.40 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--teltonika-networks-pr4jr20k--11573683

## 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 | 1.89 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

Teltonika PR4JR20K is a copper SFP transceiver module providing up to 1,250 Mbit/s over a single RJ‑45 Ethernet port. Designed for short-range copper links up to 100 m, it uses a 1.25 Gigabit Ethernet interface and comes in a grey metal housing. Suitable for network switches and media converters; compliant with REACH and RoHS. Pack of 1.

## Long description

TELTONIKA PR4JR20K is a copper SFP transceiver module designed to provide up to 1.25 Gbps Ethernet over a single RJ‑45 port for short-range copper links. Housed in a grey metal enclosure, the unit is intended for integration with network switches, routers and media converters to convert or extend Ethernet signals over twisted‑pair copper cabling. It supports standard 1.25 Gigabit Ethernet signaling and is suitable for LAN upgrades, link extension and installations where a compact, protocol‑transparent copper transceiver is required.
Advantages
The transceiver offers a compact and industry‑standard solution for adding 1.25 Gb/s copper connectivity to existing network equipment without modifying connected devices. It provides transparent media conversion at the physical layer and stable short‑range performance over copper cabling. The grey metal housing offers mechanical protection and helps with heat dissipation, while RJ‑45 connectivity simplifies deployment with common Ethernet infrastructure.
Suitable for
 Extending Ethernet links over copper within office and industrial LANs
 Interfacing switches and routers that require a 1.25 Gb/s copper connection
 Upgrading network segments to support 1.25 Gb/s copper transmission
 Connecting devices in mixed‑media networks where copper conversion is necessary
Key specifications
 Maximum data transfer rate: 1250 Mbit/s
 Ethernet interface type: 1.25 Gigabit Ethernet
 Ethernet LAN (RJ‑45) ports: 1
 Maximum transfer distance over copper: 100 m
 Product colour and housing: grey metal
 Function: media conversion / copper SFP transceiver for Ethernet
How to use
Install the PR4JR20K by inserting it into the compatible SFP slot or mounting location specified by your equipment and connecting a standard RJ‑45 cable from the transceiver to the Ethernet port of a switch, router or endpoint. Use appropriate twisted‑pair copper cabling (Cat5e or Cat6 recommended) and keep cable lengths within the specified 100 m limit. Provide power and verify link/activity indicators on connected devices to confirm physical connectivity. The module performs protocol‑transparent conversion; ensure connected devices support the 1.25 Gb/s link or will negotiate to a shared rate.
Usage recommendations
For dependable 1.25 Gb/s operation, use quality Cat5e or Cat6 cabling, avoid exceeding recommended copper run lengths, and install the transceiver in a ventilated area away from strong electromagnetic interference. Follow local grounding and mounting guidelines for industrial environments to preserve signal integrity and equipment safety.

## Specifications

| Feature | Value |
|---|---|
| Interface type | SFP |
| Ethernet LAN | Yes |
| SFP transceiver type | Copper |

### Network

| Feature | Value |
|---|---|
| Ethernet interface type | 1.25 Gigabit Ethernet |
| Maximum data transfer rate | 1250 Mbit/s |

### Ports & interfaces

| Feature | Value |
|---|---|
| Ethernet LAN (RJ-45) ports | 1 |

### Performance

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

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | REACH, RoHS |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 95 |
| Operating temperature (T-T) | -40 - 70 |

### Logistics data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

### Features

| Feature | Value |
|---|---|
| Product colour | Grey |
| Housing material | Metal |

## FAQ

### How much does the Teltonika PR4JR20K SFP Copper Transceiver 1.25 Gbps cost, and is it available for purchase?

The price is 37.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 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, 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 Teltonika Networks 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 Teltonika Networks 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, ethernet lan (rj-45) ports, maximum transfer distance, ethernet interface type, product colour, 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.

### Where can I download the instructions for Teltonika PR4JR20K SFP Copper Transceiver 1.25 Gbps?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/11573683/67661894_large.webp