StarTech.com 1-Port Gigabit Network Isolator, Compact In-line RJ45 Ethernet Coupler with 4kV Galvanic Isolation, IP40, DIN Rail Mountable, TAA Compliant

Product Overview

AI-generated summary

For £35.99 ex‑VAT, this is a decent “quiet insurance policy” for anyone who needs to break ground loops or reduce network noise between two Ethernet segments—without changing the rest of their setup. It’s the kind of in-line isolator you drop in when you’ve got annoying symptoms: intermittent faults, weird throughput drops near industrial gear, or hum/ground-related stability issues. StarTech tends to be reliable on the basics, and the fact it’s compact and DIN‑rail mountable makes it a lot more practical for real rack/cabinet installs than random dongles.

That said, it’s not a magic fix and it’s not for everyone. If you’re dealing with a simple office patching issue, you’ll just be paying for isolation you don’t need. Also, don’t expect it to help with problems like bad wiring, packet loss from oversubscription, or a misbehaving switch—this won’t troubleshoot those, it just changes the electrical relationship between endpoints. Buy it if you specifically want galvanic isolation in a controlled point-to-point patch link (industrial/OT adjacent, mixed power domains, or known grounding constraints). If you don’t have that kind of requirement, spend the money elsewhere—like fixing cabling, checking switch ports, or sorting power/grounding properly.