Optical SFP Module MaxLink ML-S5531-3 WDM BiDi 1550 nm, 3 km

The MaxLink ML-S5531-3 is a compact SFP optical transceiver designed for WDM BiDi operation at a 1550 nm wavelength and a transmission range up to 3 km. This hot-pluggable module fits standard SFP slots in switches, media converters and other compatible network devices to enable single-fiber bidirectional links, simplifying fiber deployment where laying a second fiber is impractical. The transceiver supports common applications in short metro, campus and enterprise backbones where reliable optical connectivity and minimal footprint are required.

Advantages

The module offers single-fiber bidirectional transmission using WDM BiDi technology, reducing fiber infrastructure needs while preserving full duplex communication. Its SFP form factor supports hot-pluggable installation for minimal service disruption during replacement or upgrades. The device is engineered to provide stable signal transmission over distances up to 3 km at the 1550 nm wavelength, compatible with typical network equipment acceptance of standard optical transceivers.

Suitable for

• Extending fiber backbone links in enterprise and campus networks
• Connecting switches and routers where single-fiber runs are preferred
• Media converters and fiber-to-Ethernet conversion in limited-fiber environments
• Short metro links and access networks up to 3 km

Key specifications

• Form factor: SFP (hot-pluggable)
• Transmission method: WDM BiDi (single-fiber bidirectional)
• Wavelength: 1550 nm
• Maximum link distance: up to 3 km
• Application: short metro, enterprise and campus fiber links

How to use

Install the ML-S5531-3 into a compatible SFP slot on your switch, media converter or other network device while the device is powered according to the host equipment manual. Pair with a matching BiDi transceiver at the remote end that uses the complementary wavelength or channel configuration for proper bidirectional operation. Route and secure a single-mode fiber to the transceiver’s optical connector, confirm link LEDs on the host device, and verify connectivity with standard network testing tools.

Usage recommendations

Use the module with single-mode fiber and ensure connectors and fiber cleanliness to maintain signal quality. Match the transceiver with a compatible BiDi partner module and verify the host device supports SFP optics. Observe vendor guidance for handling and electrostatic precautions when installing or removing the module.