# SFP Transceiver Module StarTech.com J4858C 1000BASE-SX 1GbE Multi Mode Fiber

**URL:** https://aio.lv/en/product--startech-j4858cst--11304722
**Data updated:** 2025-12-30 21:06 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** StarTech
**Manufacturer code:** J4858CST
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 56.49 €
**Prices and availability valid until:** 2026-07-07 23:59
**Price without VAT (21%):** 46.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-j4858cst--11304722

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.06.2026 | free |
| Pickup points | 29.06.2026 | 1.99 EUR |
| Courier delivery to door | 29.06.2026 | 4.99 EUR |

## Summary description

The StarTech.com J4858C SFP Transceiver Module supports 1000BASE-SX with a maximum data transfer rate of 1250 Mbit/s. It is designed for multi-mode fiber optic connections up to 550m, operating at 850nm. The module is compliant with RoHS and certified by CE, FCC, and UL. Its aluminum housing ensures durability, and it has a low power consumption of 1 W. Ideal for enhancing network performance in various applications.

## Long description

The StarTech.com J4858C SFP Transceiver Module provides reliable 1 GbE fiber connectivity for 1000BASE-SX networks. Designed as an HPE J4858C compatible module, it supports multi-mode fiber links up to 550 m (1804 ft) using an LC connector and operates at an 850 nm wavelength. The module includes Digital Diagnostics Monitoring (DDM), low power consumption and an aluminum housing for durability, and is hot-swappable to allow seamless upgrades or replacements.
Advantages
This SFP transceiver delivers certified 1000BASE-SX performance with a maximum data transfer rate of 1.25 Gbps and support for multi-mode fiber. It is programmed and tested for compatibility with HPE equipment, features DDM for real-time monitoring, consumes less than 1.3 W of power, and offers a high MTBF of 3,381,761 hours. The product is covered by StarTech.com’s lifetime warranty and lifetime multilingual technical support.
Suitable for
Short-range fiber connections within enterprise and data center LANs
Upgrading switches and routers to 1 GbE fiber links
Replacing faulty or end-of-life SFP modules in HPE-compatible equipment
Key specifications
Standard: 1000BASE-SX
Maximum data rate: 1.25 Gbps
Wavelength: 850 nm
Fiber type: Multi Mode Fiber (MMF)
Connector: LC
Maximum distance: 550 m (1804 ft)
Power consumption: \< 1.3 W
MTBF: 3,381,761 hours
Digital Diagnostics Monitoring (DDM): Yes
Compatibility: HPE J4858C compatible
Warranty: Lifetime
How to use
Insert the SFP transceiver into an available SFP slot on a compatible switch or router while the device is powered on or off; the module is hot-swappable. Connect the multi-mode fiber cable with LC connectors to the transceiver ports, ensuring proper polarity and secure connections. Use the device management interface to verify link status and view diagnostics via DDM. For optimal performance, confirm that the connected fiber supports 1000BASE-SX specifications and that link distance does not exceed 550 m.
Usage recommendations
Install and test the module in a controlled maintenance window where possible to minimize impact on production traffic. Use certified multi-mode fiber and LC connectors, monitor DDM parameters regularly for signal quality and temperature, and replace modules showing degraded diagnostics. Keep firmware and switch/router drivers up to date to maintain compatibility.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | SFP |
| Maximum data transfer rate | 1250 Mbit/s |
| Networking standards | IEEE 802.3z |
| Duplex system | Full, Half |
| Wavelength | 850 nm |
| Fiber optic connector | LC |
| Maximum transfer distance | 550 m |
| Wavelength-division multiplexing (WDM) | No |
| Digital Diagnostics Monitoring (DDM) | Yes |
| Multi-mode fiber (MMF) supported | Yes |
| SFP transceiver standard | SX |

### Network

| Feature | Value |
|---|---|
| SFP transceiver type | Fiber optic |

### Features

| Feature | Value |
|---|---|
| Mean time between failures (MTBF) | 3381761 h |
| Product colour | Silver |
| Housing material | Aluminium |
| Hot-swap | Yes |

### Certificates

| Feature | Value |
|---|---|
| Certification | CE, FCC, UL |
| Compliance certificates | RoHS |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 30 - 75 |
| Storage temperature (T-T) | -40 - 85 |
| Operating temperature (T-T) | 0 - 70 |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | China |
| Master (outer) case height | 200 mm |
| Master (outer) case width | 254 mm |
| Master (outer) case length | 305 mm |
| Products per master (outer) case | 36 pc(s) |
| Harmonized System (HS) code | 85369010 |

### Packaging content

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

### Power

| Feature | Value |
|---|---|
| Power consumption (typical) | 1 W |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.018 kg |
| Height | 13 mm |
| Width | 14 mm |
| Depth | 57 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 46 g |
| Package depth | 93 mm |
| Package height | 33 mm |
| Package width | 119 mm |

## FAQ

### How much does the SFP Transceiver Module StarTech.com J4858C cost, and is it available for purchase?

The price is 56.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 42 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 22.06.2026 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 StarTech 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 StarTech 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: interface type, maximum data transfer rate, weight, 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 SFP Transceiver Module StarTech.com J4858C?

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/11304722/65473764_large.webp