StarTech.com HPE JG661A Compatible QSFP+ Module - 40GBASE-LR4 - 40GbE Single Mode Fiber Optic Transceiver - 40GE Gigabit Ethernet QSFP+ - LC 10km - 1270nm to 1330nm - DDM HPE 5900AF, 12902

Product Overview

AI-generated summary

If you’ve got an HPE 5900AF or you’re using the 12902 gear and you need a like-for-like QSFP+ optics replacement, this is a pretty sensible buy. The price (~£123.83 ex-VAT) is in the “don’t overthink it” range for 40G single-mode LR4 on 10km-class links, and DDM support is the kind of practical feature that saves you headaches when you’re troubleshooting link health. In day-to-day reseller life, the value here is mostly about getting optics that behave predictably in the target ecosystem rather than rolling the dice on vague compatibility.

That said, I wouldn’t buy it for anything outside the intended HPE compatibility context unless you’re 100% sure your switch ports accept StarTech-coded optics (some environments are picky, even when specs look right). Also, make sure your planned reach and fiber type match what you actually have—10km optics can be fine, but only if the installed plant (loss, patching, cleanliness) is up to scratch. If you just need short-reach within a rack or you’re uncertain about compatibility, you might be better off choosing a solution explicitly aligned to your switch model and distance requirements to avoid swap-test turns into a time sink.