D-Link DEM-433XT-DD Compatible 10GBASE-ER SFP+ 40km

EdgeOptic's DEM-433XT-DD compatible is a D-Link-coded version of the EdgeOptic 10G-SFP-40 multi-vendor 10GBASE-ER SFP+ transceiver. The DD suffix is D-Link's designation for the variant with Digital Diagnostics Monitoring. This compatible carries the DEM-433XT-DD identity that D-Link DGS and DXS series Ethernet switches expect, so the switch port recognizes the module without manual configuration. Protocol scope matches a campus Ethernet switch role: 10 Gigabit Ethernet with Gigabit Ethernet support.

The module operates at the 1550 nm long-wavelength window over duplex single-mode fiber and terminates in a double LC/UPC connector pair. It reaches 40 km on standard SMF and carries a 15 dB link budget, the loss allocation available to the span. Chromatic dispersion tolerance runs from 800 to 1000 ps/nm, which covers the accumulated dispersion of a typical 40 km G.652 fiber run. Transmit power is specified from −1 dBm at the low end to +4 dBm at the high end, receiver sensitivity is −16 dBm, and receiver overload is 0 dBm. Those figures match the original DEM-433XT-DD, so the optical path behaves the same across the 40 km span and link margin calculations carry over unchanged. The transceiver runs on a single +3.3 V supply and is rated for the 0 to 70 °C commercial temperature range, the standard operating envelope for indoor switching equipment.

Digital diagnostics monitoring is the feature the DD designation calls out. The module reports module temperature, supply voltage, laser bias current, transmit optical power, and receive optical power, so link health can be read directly from the DGS or DXS switch without an external optical power meter. A 40 km ER reach suits data-center site interconnection, metro and carrier access aggregation, and building-to-building campus backbone links. The module is CE marked, RoHS compliant, and rated Class 1 under IEC 60825-1 for laser safety. It is built to the SFF-8431 specification and the SFP+ Multi-Source Agreement, which keeps the electrical and mechanical interface consistent with the host port.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, this DEM-433XT-DD compatible ships next business day from EU stock with a lifetime warranty. For deployment questions or volume pricing, contact our sales team.