| Ports & interfaces | |
| Interface | Fiber |
| Connectivity technology | Wired |
| Fiber ports quantity | 1 |
| Fiber optic connector | LC |
| Weight & dimensions | |
| Weight | 16 g |
| Height | 13 mm |
| Width | 14 mm |
| Depth | 57 mm |
| Energy management | |
| Power consumption (typical) | 1 W |
| Operational conditions | |
| Operating relative humidity (H-H) | 5 - 95% |
| Storage temperature (T-T) | -40 - 85 °C |
| Operating temperature (T-T) | 0 - 70 °C |
| Networking | |
| Data link protocols | Ethernet |
| Maximum data transfer rate | 1250 Mbit/s |
| Ethernet LAN | ![]() |
| Wi-Fi | ![]() |
| Ethernet LAN data rates | 1000 Mbit/s |
| Packaging data | |
| Package weight | 45 g |
| Package depth | 113 mm |
| Package height | 33 mm |
| Package width | 91 mm |
| Quantity per pack | 1 pc(s) |
| Certificates | |
| Certification | FCC, UL, CE |
| Compliance certificates | RoHS |
| Packaging content | |
| Quantity per pack | 1 pc(s) |
| Other features | |
| Housing material | Aluminum |
| Network interface card cable medium | Fiber |
| Design | |
| Internal | ![]() |
| Form factor | SFP |
| Product colour | Silver |
| Performance | |
| Interface type | SFP |
| Maximum data transfer rate | 1250 Mbit/s |
| Networking standards | IEEE 802.3z |
| Wavelength | 1310 nm |
| Auto MDI/MDI-X | ![]() |
| Fiber optic connector | LC |
| Duplex system | Full |
| Maximum transfer distance | 10000 m |
| SFP transceiver type | Fiber optic |
| Digital Diagnostics Monitoring (DDM) | ![]() |
| Multi-mode fiber (MMF) supported | ![]() |
| Single-mode fiber (SMF) supported | ![]() |
| Features | |
| Mean time between failures (MTBF) | 3092408 h |
| Data transfer rate | 1.25 Gbit/s |
| Product colour | Silver |
| Hot-swap | ![]() |
| Logistics data | |
| Country of origin | China |
| Master (outer) case height | 350 mm |
| Master (outer) case width | 340 mm |
| Master (outer) case length | 426 mm |
| Products per master (outer) case | 108 pc(s) |
| Harmonized System (HS) code | 85369010 |
| EAN | 0065030865296 |
| Warranty | 30 years |
The StarTech J4859CST 1000BASE-LX SFP transceiver provides wired connectivity for enterprise switches, routers, and similar networking equipment. It uses a standard SFP interface to establish a physical link and supports data transfer rates up to 1250 Mbit/s. Designed to the IEEE 802.3z 1000BASE-LX standard, the module is compatible with existing 1 GbE infrastructure and can be used to increase port capacity or replace faulty components.
The aluminum housing protects the internal circuitry while fitting standard equipment slots. This transceiver supports both single-mode and multi-mode fiber to suit different installation requirements. It includes built-in Digital Diagnostics Monitoring (DDM), allowing the host switch to track real-time operational parameters and link health. As a wired Ethernet device, it does not include Wi-Fi functionality.
Key Features:- One LC fiber optic connector
- 1310 nm transmission wavelength
- Maximum transmission distance of 10,000 metres
- Dimensions: 57 mm deep; weight: 16 g
- Typical power consumption: 1 W
Estimated delivery: 12.10 - 15.10
Today: 10:00 - 18:00
Estimated delivery: 12.10 - 15.10
Today: 09:00 - 17:00
Estimated delivery: 12.10 - 15.10
Today: 10:00 - 17:00
Estimated delivery: 12.10 - 15.10
Today: 10:00 - 18:00
Estimated delivery: 12.10 - 15.10
Today: 10:00 - 17:00
Estimated delivery time: 12.10 - 15.10
Estimated delivery time: 12.10 - 14.10
Estimated delivery time: 13.10 - 15.10
Estimated delivery time: 13.10 - 15.10
Estimated delivery time: 13.10 - 14.10
Estimated delivery time: 12.10 - 15.10
Estimated delivery time: 12.10 - 15.10
Estimated delivery time: 13.10 - 14.10


