UniFi 100G LR4 Single-Mode Optical Module

The Ubiquiti UACC-OM-QSFP28-LR4 is a UniFi 100G LR4 QSFP28 transceiver built for long-reach single-mode fiber links. It carries a full 100 Gbps across distances of up to 10 km (6.2 mi) through a standard duplex LC UPC connector, while drawing no more than 4 W. From building-to-building backbones to core-to-distribution uplinks, it brings long-distance, high-capacity connectivity to your UniFi network in a compact, single-unit package.

Key features and benefits

• 100 Gbps data rate — full-speed 100G capacity for backbone, uplink and interconnect links.
• Up to 10 km (6.2 mi) reach — single-mode fiber support for long-distance links between buildings, floors and sites.
• QSFP28 form factor — compatible with QSFP28 and QSFP+ interfaces.
• Duplex LC UPC connector — works with standard two-strand single-mode patch cables and existing single-mode structured cabling.
• LR4 four-wavelength optics — transmits and receives at 1295 / 1300 / 1304 / 1309 nm.
• Low power draw — 4 W maximum power consumption keeps heat and energy use down in dense switch deployments.
• 0 to 70 °C operating range — rated for server rooms, wiring closets and equipment cabinets.
• Sold as a single unit — order exactly the number of modules your links need.

Why choose the UniFi 100G LR4 Single-Mode Optical Module?

Long-reach 100G for the UniFi ecosystem

Direct attach cables and short-reach optics are fine inside a rack or a single room, but they cannot carry 100G across a campus. The UACC-OM-QSFP28-LR4 is built for exactly that job. It transmits 100 Gbps over single-mode fiber for up to 10 km, so you can run a 100G backbone between buildings, connect a distribution switch in a remote wiring closet to your core, or link two server rooms without giving up throughput.

Standard connectors, simple deployment

The module's duplex LC UPC connector uses a single pair of single-mode fibers, so it drops straight onto common single-mode patch cables and existing structured cabling with no multi-fiber MPO trunks required. The QSFP28 form factor fits QSFP28 and QSFP+ interfaces, and with a maximum draw of 4 W the module keeps power and thermal load low even when you populate several 100G ports.

Built for real equipment rooms

Rated for ambient temperatures from 0 to 70 °C (32 to 158 °F), the UACC-OM-QSFP28-LR4 is suited to the conditions found in data halls, server rooms, wiring closets and enclosed equipment cabinets.

Ideal for

• Campus and multi-building 100G backbones.
• Core-to-distribution and switch-to-switch 100G uplinks beyond the reach of copper DACs and short-reach optics.
• Server room and data hall interconnects over existing single-mode fiber.
• Long-distance links to remote wiring closets, outbuildings and nearby sites.

Laser safety

Class 1 Laser Product (IEC/EN 60825-1:2014). Never look into the ends of a fiber optic cable or into the module's optical ports while equipment is powered.