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Shop›USB Cables & Adapters›StarTech.com Dell EMC QSFP-40G-LR4 Compatible QSFP+ Module - 40GBASE-LR4 - 40GbE Single Mode Fiber SMF Optic Transceiver - 40GE Gigabit Ethernet QSFP+ - LC 10km - 1311nm - DDM
StarTech.com Dell EMC QSFP-40G-LR4 Compatible QSFP+ Module - 40GBASE-LR4 - 40GbE Single Mode Fiber SMF Optic Transceiver - 40GE Gigabit Ethernet QSFP+ - LC 10km - 1311nm - DDM
£123.62
£148.34 inc. VAT
Out of Stock(0)MPN: QSFP40GLR4ES
🚚 Next-day delivery £4.95
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Key Features
StarTech.com Dell EMC QSFP-40G-LR4 Compatible QSFP+ Module, 40GBASE-LR4, 40GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 40GE Gigabit Ethernet QSFP+, LC Connector, 10km, 1311nm, DDM
Lifetime Warranty (QSFP40GLR4ES)
QSFP+ transceiver module (equivalent to: Dell EMC QSFP-40G-LR4)
40GbE
40GBase-LR4
MPO single-mode
up to 10 km
1311 nm
Product Overview
AI-generated summary
At £123.83 ex-VAT, this is the kind of 40G LR4 QSFP+ optics that only makes sense if you *already* have compatible Dell/Arista/Cisco-style optics or you’ve validated the switch/host will play nicely. The honest catch with “compatible” modules is not the distance or optics performance—it’s firmware/compatibility. If your Dell EMC gear accepts it cleanly, you’ll get reliable 40GbE over single-mode for metro-ish and longer campus links without paying the “Dell tax”. If you don’t, you’ll end up troubleshooting link flaps, optics not recognised, or weird alarm behaviour even though the module looks fine on paper.
Who should buy it: IT teams reselling in a practical environment who need a cost-effective replacement and can test/whitelist modules with their exact switch model. The DDM support is a plus operationally (you can monitor/confirm health instead of flying blind). Who should *not*: customers expecting plug-and-play certainty on day one, or anyone with no time to validate compatibility—especially in production where a module mismatch can become an incident. If you can confirm acceptance for your specific Dell EMC platform, it’s good value; if not, you'll need to or there are cheaper ways to gamble.
Specifications
Performance
SFP transceiver typeFiber optic
Maximum data transfer rate40000 Mbit/s
Interface typeQSFP+
Single-mode fiber (SMF) supportedY
Multi-mode fiber (MMF) supportedN
Features
Product colourSilver
Hot-swapY
Mean time between failures (MTBF)8596956 h
Brand compatibilityDell
Compatible productsQSFP-40G-LR4
Certificates
Compliance certificatesRoHS
CertificationCE, FCC, REACH, UL
Weight & dimensions
Width58.4 mm
Depth13.9 mm
Height12.6 mm
Weight40 g
Packaging content
Quantity per pack1 pc(s)
Packaging data
Package width120 mm
Package depth205 mm
Package height350 mm
Package weight40 g
Logistics data
Master (outer) case width120 mm
Master (outer) case length205 mm
Harmonized System (HS) code85369010
Master (outer) case height350 mm
Products per master (outer) case1 pc(s)
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