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Small rectangular SFP transceiver module with LC port, matte metal finish

AddOn

AddOn TXN31111-AO 1000Base-SX SFP transceiver 850nm 550m LC

SKU CH-BC2K-D8TJB

Connects switches via multimode fibre up to 550 metres at 1.25 Gbps using an LC interface

  • Port count1 x LC 1000Base-SX
  • Brand compatibilityAddOn
  • Product typeSFP (mini-GBIC)
  • Optical wavelength62.5/125 µm
  • Supported protocolsGigabit Ethernet
  • Transfer speed1.25 Gbit/s
  • Gigabit Ethernet speed at 1.25 Gbps transfer rate
  • Single LC port for 1000Base-SX multimode fibre connections
  • 850 nm wavelength reaches 550 m over 62.5/125 µm fibre
  • TAA compliant for government procurement requirements
  • Intel TXN31111 compatible module weighs .35 pounds

1000Base-SX SFP Transceiver 850nm 550m

This SFP transceiver supports Gigabit Ethernet links over multimode fibre at 1.25 Gbps. It operates at 850nm wavelength and reaches 550m on 62.5/125 µm fibre. The module uses an LC duplex connector and is TAA compliant. It suits network upgrades or repairs needing a compatible 1000Base-SX interface.

Multimode Fibre Distance And Wavelength Limits

The 850nm optics are designed for short-range multimode links up to 550 metres. Longer runs or single-mode fibre require different wavelengths and transceiver types. The LC port accepts standard duplex patch cables. Bandwidth is fixed at 1.25 Gbps with no negotiation to higher speeds. Compatibility depends on the host switch or router accepting third-party SFP modules.

Replaces Intel TXN31111 In Existing Gear

This module replaces the Intel TXN31111 when a compatible spare or expansion unit is needed. The jump is worth it when the original part is unavailable or when TAA compliance is required for procurement. It does not add new protocols or increase link speed beyond 1000Base-SX. Buyers needing 10Gbps or single-mode reach should select a different transceiver class.

How it compares

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

Price $20.99
Cheaper than about 93% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameADDON
Model nameTXN31111-AO
Part numberTXN31111-AO
Product typeSFP (mini-GBIC)
Performance
Transfer speed1.25 Gbit/s
Connectivity
Optical wavelength62.5/125 µm
Supported protocolsGigabit Ethernet
Ports & slots
Port count1 x LC 1000Base-SX
Size & build
Product weight0.35 lb (0.16 kg)
Compatibility
Brand compatibilityAddOn

Questions about this item

Should I choose the 550 m version or a longer-reach SFP for my multimode run?

This SFP is rated for 550 m on 62.5 µm multimode fibre at 850 nm; select it when your link is within that distance, otherwise choose a longer-reach module.

What does the 1.25 Gbps transfer rate mean once the transceiver is installed?

It delivers a 1.25 Gbps line rate that carries 1000Base-SX Gigabit Ethernet traffic over the LC duplex connection.

Which SFP standard does this module follow and what distance does it cap at?

It follows the 1000Base-SX SFP specification and is capped at 550 m on 62.5 µm multimode fibre at 850 nm.

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