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£45.34 inc. VAT
AI-generated summary
For £37.84 ex-VAT, this is the sort of SFP that makes sense when you need a quick, reliable copper link without paying the Cisco-brand premium. If you’ve got a compatible Cisco small/industrial switch family (IE series you mentioned), this should drop in and work as expected, and the RJ45 Cat5e/Cat6 “up to about 100m” use case is exactly where these modules shine—patching floors, connecting access switches, or wiring closets without drama. In day-to-day terms, it’s a sensible value buy for companies that just want ports to come up cleanly and stay up.
That said, I’d only buy it if you’ve already confirmed compatibility for your exact switch model/firmware (don’t assume “compatible” means “always identical behaviour” across all revisions). Also, copper SFPs are great for short runs, but if you’re planning lots of longer links or high-density structured cabling, you might get better long-term economics by standardising on a consistent module/RJ45 policy across sites rather than mixing brands. If your environment is low-risk and you’re comfortable verifying compatibility, this is a solid, cost-effective choice—if you’re in a mission-critical environment and can’t afford to trial before full rollout, spend the extra time/effort to be sure.

Dell
Dell Networking - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-LX - up to 10 km - 1310 nm - for Networking N1148, PowerSwitch S4112, S5212, S5232, S5296, PowerSwitch N1524

TP-Link
TP-Link TL-SM321B-2 V1 - SFP (mini-GBIC) transceiver module - 1GbE - 1000Base-BX - LC/UPC single-mode - up to 2 km - 1310 (TX) / 1550 (RX) nm

TP-Link
TP-Link TL-SM311LS Gigabit SFP module, Single mode, LC, 10KM

TP-Link
TP-Link DS-PMA-C+ V1 - SFP (mini-GBIC) transceiver module - GPON C+ - SC/UPC single-mode - up to 20 km - 1490 (TX) / 1310 (RX) nm