StarTech.com Dell EMC QSFP-40G-SR4 Compatible QSFP+ Module - 40GBASE-SR4 - 40GbE Multimode Fiber MMF Optic Transceiver - 40GE Gigabit Ethernet QSFP+ - MPO 150m - 850nm - DDM

Product Overview

AI-generated summary

For £31.45 ex-VAT, this is the kind of optic that makes sense when you *just need the link to come up* and you’re building/maintaining a predictable 40GbE fabric on multimode. StarTech’s “compatible” line is usually a pragmatic pick for UK businesses that don’t want to pay OEM pricing for every spares refresh, and the DDM support is the minimum you want in a managed environment (it helps with monitoring rather than guessing). If your switches/storage gear accepts these cleanly, it’s great value for day-to-day operations and keeping labour time low during swaps.

That said, I wouldn’t buy it blindly if you’re not already confident your exact Dell EMC model supports this specific transceiver type. With optics, “compatible” can still mean “works on some firmware/toolchains and causes headaches on others,” so it’s worth verifying compatibility in your vendor’s optics matrix or testing one unit before you commit to spares. Also, don’t treat the stated reach as a guarantee in every install—real results depend heavily on your fibre plant quality and patching (MPO cleanliness and lane mapping matter).

**Who it’s for:** IT teams who maintain 40GbE over MMF, want DDM visibility, and are cost-conscious on spares/rollouts. **Who should avoid:** anyone running picky/locked-down hardware, or projects where you can’t afford downtime to verify compatibility first.