- Network Admin
5 Network Performance Issues Slowing Down Your Business
20 Feb, 2026





£19.31 inc. VAT
AI-generated summary
For £16.12 ex‑VAT, this kind of 1GE SFP-to-RJ45 module is *only* worth it if you’re solving a very specific “I need Ethernet where there’s an SFP cage” problem—and doing it cheaply. In the real world, it’s a practical buy for patching up small office/branch links, quick lab setups, or when you don’t want to pay for a dedicated RJ45 transceiver. If your switch supports these compatible modules (and you’ve checked compatibility with the exact model), it’s a cost-effective way to get 100m copper connectivity without changing your network gear.
That said, I’d be cautious if you need reliability at scale or if this is mission-critical. Compatible SFPs can be a bit more finicky than OEM modules—sometimes they’ll work fine, but you can also run into negotiation issues, odd link dropouts, or “it works on one switch but not another.” Also, the product category label is basically a misfit here; this is a networking module, not really a “USB cable” situation—so make sure your use case is genuinely SFP-based. If you’re buying for a single port, short-run copper, and you can verify compatibility, it’s good value. If you’re equipping production racks and can’t afford troubleshooting time, you’ll probably sleep better with OEM parts.

STARTECH
StarTech.com - USB cable - USB-C (M) to USB-C (M) - USB4 / Thunderbolt 3 / Thunderbolt 4 / DisplayPort 1.4 - 2 m - 4K120Hz support, rugged, extended power range (EPR), Power Delivery 3.1 support, flexible - black

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StarTech.com MSA Uncoded Compatible SFP+ Module, 10GBASE-LRM, 10GbE Multi Mode (MMF) Fiber Optic Transceiver, 10GE Gigabit Ethernet SFP+, LC Connector, 200m, 1310nm, DDM, Mini GBIC Module - Lifetime Warranty (SFP-10GBASE-LRM-ST) - SFP+ transceiver module - 10GbE - 10GBase-LRM - LC multi-mode - up to 200 m - 1310 nm

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StarTech.com 4m USB C Cable w/ PD - 13ft USB Type C Cable - 5A Power Delivery - USB 2.0 USB-IF Certified - USB 2.0 Type-C Cable - 100W/5A (USB2C5C4M) - USB cable - USB-C (M) to USB-C (M) - USB 2.0 - 5 A - 4 m - for P/N: CDP2HVGUASPD, DKT30CHCPD, DKT30CHD, DKT30CHPD3, DKT30CHVSDPD, DKT31CMDPHPD

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StarTech.com Arista Networks QSFP-40G-LR4 Compatible QSFP+ Module, 40GBASE-LR4, 40GbE Single Mode (SMF) Fiber Optic Transceiver, 40GE Gigabit Ethernet QSFP+, LC 10km, 1270nm to 1330nm, DDM - Lifetime Warranty (QSFP-40G-LR4-AR-ST) - QSFP+ transceiver module (equivalent to: Arista Networks QSFP-40G-LR4) - 40GbE - 40GBase-LR4 - LC single-mode - up to 10 km - 1270-1330 nm