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18 Mar, 2026
TP-Link Omada 1000Base-BX WDM Bi-Directional SFP Module
£14.17
£17.00 inc. VAT
Out of Stock(0)MPN: SM321B
🚚 Next-day delivery £4.95
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Key Features
TP-Link TL-SM321B V3.2
SFP (mini-GBIC) transceiver module
1GbE
1000Base-BX
LC/UPC single-mode
up to 20 km
1310 (TX) / 1550 (RX) nm
Product Overview
AI-generated summary
At £13.78 ex-VAT, this TP-Link Omada 1000Base-BX WDM bidirectional SFP is exactly the sort of “cheap but sensible” part you buy when you need to link two switches over fibre and you *already* know you’re using the right pair of wavelengths. The real-world value is reliability and cost: Omada gear tends to be consistent, and for short, typical SMB fibre runs, these SFPs usually just do the job without fuss. If you’re building out a small Omada-based network (or extending one), it’s a cost-effective way to avoid paying big-brand premiums for the same basic function.
That said, I wouldn’t buy these blindly. BX WDM modules are wavelength/polarity sensitive in a way that can waste time—make sure you have the correct “send/receive” pairing for each end and the right fibre type/links. If you buy the wrong side, you can end up with link negotiation failures that are annoying to debug. Also, if your network is mission-critical and you can’t afford downtime, it’s worth having a spare on-site or verifying compatibility with your exact switch model before ordering. For the right Omada setup, though, this is a solid, low-cost component—just don’t treat it like a generic “any SFP will work” purchase.
Specifications
Performance
SFP transceiver typeFiber optic
Maximum data transfer rate1250 Mbit/s
Interface typeSFP
Single-mode fiber (SMF) supportedY
Fiber cable diameters supported (core/cladding)9/125 µm
Features
Product colourSilver
Hot-swapY
Power
Input voltage3.3 V
Certificates
CertificationFCC, CE
Operational conditions
Minimum operating temperature0 °C
Maximum operating temperature70 °C
Operating temperature (T-T)0 - 70 °C
Storage temperature (T-T)-40 - 85 °C
Operating relative humidity (H-H)10 - 90 %
Weight & dimensions
Width55.4 mm
Depth14.6 mm
Height12.9 mm
Packaging content
Quantity per pack1 pc(s)
Packaging data
User guideY
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