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Box of ten black SFP transceiver modules with LC duplex ports

STARTECH

STARTECH J4859C10PKST 10-pack SFP transceiver 1000BASE-LX 10km 1.25Gbps 1310nm

SKU CH-SMWC-GSHFK MPN J4859C10PKST

Ten SFP modules deliver 1.25 Gbps Gigabit Ethernet over single-mode or multi-mode fiber up to 10 km using 1310 nm wavelength

  • Port count1 - Fiber Optic LC Duplex Female
  • Product typeTransceiver
  • Supported standardsIEEE 802.3z 1000BASE-LX
  • Optical wavelength1310 nm
  • Supported protocolsTCP/IP
  • Maximum range10 km (6.2 mi)

Type 10-Pack, 1000Base-LX

  • 10-pack lowers cost per link for multi-site deployments
  • IEEE 802.3z 1000BASE-LX standard ensures Gigabit Ethernet interoperability
  • 1310 nm wavelength supports single-mode and multi-mode fibre
  • 10 km reach extends campus or metro connections without repeaters
  • Hot-pluggable SFP form factor allows live insertion and removal

10-pack SFP transceiver for Gigabit links

This bundle contains ten hot-pluggable SFP modules rated for 1.25 Gbps transfer rate over single-mode or multi-mode fibre. Each transceiver complies with IEEE 802.3z 1000BASE-LX and uses a 1310nm wavelength to reach up to 10 km. The LC duplex female ports fit standard Gigabit Ethernet switches and routers.

Bulk packaging simplifies multi-site deployments

Buying the 10-pack reduces per-unit cost and ensures identical modules across every link, which eases sparing and firmware consistency. All units carry lifetime warranty coverage and are guaranteed compatible with HP J4859C equipment. No additional software or licences are included in the pack.

Verify switch port type

Confirm that your hardware accepts SFP mini-GBIC form factor and supports 1000BASE-LX optics at 1310nm. The link budget assumes single-mode fibre for the full 10 km distance; multi-mode reach will be shorter. Ensure LC duplex patch cables match the transceiver ports and that the total link loss stays within the module budget.

How it compares

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

Price $252.99
Pricier than about 66% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameStarTech.com
Model nameJ4859C10PKST
Product typeTransceiver
Performance
Transfer speed1.25 Gbit/s
Connectivity
Supported standardsIEEE 802.3z 1000BASE-LX
Optical wavelength1310 nm
Supported protocolsTCP/IP
Maximum range10 km (6.2 mi)
Ports & slots
Port count1 - Fiber Optic LC Duplex Female
Size & build
Shipping weight0.45 kg
Package size203 × 152 × 76 mm

Other versions of this model

2 more in the same range

Questions about this item

Will the LC duplex connectors on these 1000BASE-LX transceivers need periodic cleaning or replacement?

The LC duplex female ports are passive optical interfaces; they do not wear out, but the fiber end faces should be inspected and cleaned with a lint-free wipe and isopropyl alcohol whenever a link is re-patched to maintain the 10 km reach.

What limits the sustained 1.25 Gbps throughput of these SFP modules during continuous operation?

The IEEE 802.3z 1000BASE-LX standard defines the line rate, so the hard limit is the 1.25 Gbps serial interface; the module itself does not impose additional buffering or thermal throttling below that rate.

How much heat does a single module add when running all day in a 10-pack deployment?

Each hot-pluggable SFP draws minimal power and dissipates only a few watts, so a full 10-pack adds negligible heat to a standard switch chassis — no extra cooling is required beyond normal airflow.

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