SFP Transceiver OEM X121 1G LC LX J4859C

Name: SFP Transceiver OEM X121 1G J4859C_OEM
Brand: OEM
SKU: 3520268
Price: 13.99 EUR
Availability: InStock

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SFP Transceiver OEM X121 1G LC LX J4859C — 1 Gigabit, LC connector, LX (single-mode) optical module

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Short description

SFP Transceiver OEM X121 1G LC LX J4859C is a 1 Gigabit small form-factor pluggable optical module with an LC connector supporting LX single-mode fiber links. Designed for network equipment with SFP ports, it provides fiber connectivity for long-distance Ethernet or telecom links, enabling reliable data transmission, easy hot-swapping and compact installation in switches, routers and media converters.

Available for order: 20 pcs.

Warranty: 1 Year

SKU: 3520268

Manufacturer: OEM

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Deliver the order:

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to the Customer Service Center at Kengaraga 2b, Riga

01.07.2026 {{selectedOffer.officeDeliveryString}}

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

01.07.2026 {{selectedOffer.officeDeliveryString}}

free

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From 4.99 €

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Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts nodaļa

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From 1.99 €

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Payment Methods:

Bank transfer, Bank cards on-line, Apple Pay, Google Pay

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Product information

Description

SFP transceiver 1.25Gbps, 1000BASE-LX, single-mode (SM), up to 20 km, 1310 nm, LC duplex connector, operating temperature 0–70°C, 3.3 V supply; HP compatible (equivalent to J4859C). This SFP module provides a compact, hot-pluggable interface for adding 1 Gigabit fiber links to switches, routers and media converters supporting SFP ports.

Advantages

The transceiver supports 1000BASE-LX long-reach single-mode operation over distances up to 20 km and uses an LC duplex connector for standard fiber links. Its small form-factor pluggable design enables hot-swapping and compact installation in network equipment. The module operates from a 3.3 V supply and is temperature-rated for typical commercial environments (0–70°C). Compatibility with HP J4859C-equivalent ports ensures interoperability with hardware that expects that vendor form factor.

Suitable for

Connecting switches and routers over single-mode fiber links up to 20 km
Fiber uplinks between floors or buildings in enterprise networks
Media converters and network devices requiring SFP LX modules

Key specifications

Data rate: 1.25 Gbps (1 Gigabit Ethernet)
Standard: 1000BASE-LX
Fiber type: single-mode (SM)
Wavelength: 1310 nm (FP)
Maximum reach: 20 km
Connector: LC duplex
Supply voltage: 3.3 V
Operating temperature: 0 to 70 °C
Compatibility: HP compatible, J4859C equivalent

How to use

Insert the SFP transceiver into an empty SFP port on a compatible switch, router or media converter until it clicks into place. Connect the LC duplex single-mode fiber cable (observe TX/RX orientation) and ensure both ends are properly secured. The module supports hot-plugging; verify link status and configure the device interface as required by your network equipment.

Usage recommendations

Use single-mode fiber with appropriate LC duplex connectors and ensure clean connector end-faces for optimal performance. Operate the module within the specified temperature and voltage ranges and confirm compatibility with your device firmware or vendor compatibility lists when deploying in production networks.

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Customer questions

FAQ

How much does the SFP Transceiver OEM X121 1G LC LX J4859C cost, and is it available for purchase?

The price is 13.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 20 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, 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 OEM 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 OEM 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

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