# SFP transceiver module HPE X121 1G LC SX

**URL:** https://aio.lv/en/product--hp-j4858c-rfb--621567
**Data updated:** 2025-12-08 08:32 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** HP
**Manufacturer code:** J4858C-RFB
**EAN:** 5712505306703
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hp-j4858c-rfb--621567

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

The HPE X121 1G SFP LC SX is a fiber optic transceiver module designed for high-speed data transfer up to 1000 Mbit/s. Operating at a wavelength of 850 nm, it ensures reliable connectivity over short distances. With compact dimensions of 56.9 mm width, 13.7 mm depth, and 12.2 mm height, it fits easily into SFP slots. Ideal for networking applications, it provides seamless integration and enhanced performance.

## Long description

A small form-factor pluggable (SFP) Gigabit SX transceiver that provides a full-duplex Gigabit solution up to 550 m on multimode fiber.
Advantages
The SFP Gigabit SX transceiver supports full-duplex 1 Gbps data transfer over multimode fiber up to 550 m, in a compact hot-pluggable module. Its small form factor enables flexible installation in switches, routers and media converters while maintaining standard SFP compatibility for straightforward replacement and upgrades.
Key specifications
Form factor: SFP (small form-factor pluggable)
Data rate: 1 Gbps (full-duplex)
Optical mode: Multimode fiber (MMF)
Maximum reach: Up to 550 m
Application: Gigabit SX transceiver
How to use
Insert the SFP module into an available SFP port on compatible networking equipment until it clicks into place. Connect multimode fiber cables to the transceiver’s optical interface, ensuring correct polarity and secure connectors. Configure the network device for 1 Gbps full-duplex operation if required; the module is hot-pluggable and can be replaced without powering down most supported devices.
Recommendations
Use multimode fiber of appropriate grade (e.g., OM1–OM4) and verify connector type and polarity before installation. Check device compatibility lists and firmware requirements to ensure proper operation at 1 Gbps full-duplex up to 550 m.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | SFP |
| Maximum data transfer rate | 1000 Mbit/s |
| Duplex system | Full |
| Wavelength | 850 nm |
| Fiber ports quantity | 1 |
| Fiber optic connector | LC |
| Maximum transfer distance | 550 m |
| Fiber cable diameters supported (core/cladding) | 50/125, 62.5/125 |
| Multi-mode fiber (MMF) supported | Yes |
| SFP transceiver standard | SX |

### Network

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

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.02 kg |
| Height | 12.2 mm |
| Width | 56.9 mm |
| Depth | 13.7 mm |

## FAQ

### How much does the SFP transceiver HPE X121 1G cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 16 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 01.07.2026 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 HP 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 HP 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, 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/621567/64681975_large.webp