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Small rectangular SFP transceiver module with LC port and metal housing

AddOn

AddOn J4858B-AO SFP transceiver 1000Base-SX MMF 850nm 550m LC

SKU CH-J2FY-XNHJE MPN J4858B-AO

A 1 Gbps SFP transceiver for 550 m multi-mode fibre at 850 nm with an LC connector and 0 to 70 °C operating range

  • Form factorSFP
  • Port count1 x LC 1000Base-SX
  • Brand compatibilityHP®
  • Product typeTransceiver
  • Fiber modeMMF
  • Supported protocolsTCP/IP
  • TAA compliant for regulated procurement
  • 1 Gbps transfer rate over multimode fibre
  • 550 m reach at 850 nm wavelength
  • LC duplex connector fits standard SFP ports
  • Operates reliably from 0 to 70 °C

What this SFP transceiver does

The AddOn J4858B-AO is a hot-pluggable SFP module built for 1 Gbps Ethernet links over multi-mode fibre. It suits network engineers extending a LAN within a building or campus where the fibre run stays inside the 550 m reach limit. The LC duplex connector and 850 nm wavelength match standard OM1 or OM2 patch cables already in place.

The reach number that matters

This module is rated for 550 m on multi-mode fibre at 850 nm. If the planned link exceeds that distance, or if the installed cabling is single-mode, this part will not work and a different transceiver must be chosen.

Thermals noise and power in normal use

The transceiver operates from 0 °C to 70 °C without external cooling. It draws power directly from the host SFP cage and runs silently because it has no moving parts. Digital optical monitoring lets the switch report real-time temperature, voltage and optical levels for proactive maintenance.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $44.99
Cheaper than about 76% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameAddOn
Part numberJ4858B-AO
Product typeTransceiver
Performance
Transfer speed1 Gbit/s
Connectivity
Fiber modeMMF
Supported protocolsTCP/IP
Ports & slots
Port count1 x LC 1000Base-SX
Size & build
Form factorSFP
Shipping weight0.16 kg
Package size121 × 70 × 30 mm
Compatibility
Brand compatibilityHP®

Questions about this item

What does the 1000Base-SX rating mean for actual throughput in a switch?

The module delivers a 1 Gbps Ethernet link over multi-mode fiber, so real-world throughput sits at line-rate gigabit for the connected port.

Which SFP interface standard does this transceiver use and what distance limit does it impose?

It follows the SFP 1000Base-SX specification with an LC connector, capping reach at 550 meters on 850 nm multi-mode fiber.

What physical slot and fiber patch cord does the module need to install?

It plugs into any standard SFP cage and requires a duplex LC multi-mode patch cable for the optical connection.

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