TIFNEX catalog
40G and 50G transceivers
40G QSFP+ and 50G optics for aggregation and legacy spine links, from 100m multimode to 40km.
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Arista Compatible 40GBASE-ZR4 QSFP+ 1310nm 80km DOM Duplex LC/UPC SMF Optical Transceiver Module
In stock
Buying guide
40G and 50G transceivers from TIFNEX
40G QSFP+ is still widely deployed in aggregation layers and older spine-leaf fabrics. TIFNEX supplies around 200 40G and 50G modules, including 40GBASE-SR4 and CSR4 (MPO multimode, 100m to 400m), BiDi (LC duplex over multimode), LR4 (10km) and ER4 (40km).
SR4 modules can also be broken out to four 10G links with an MTP/MPO breakout harness. Moving to 100G? Browse 100G QSFP28 transceivers, which use the same port size.
Common questions
What is the difference between 40G SR4 and 40G BiDi?
SR4 uses eight fibers through an MPO-12 connector. BiDi uses a standard LC duplex pair, so it can reuse existing 10G multimode cabling.
Can a QSFP+ module work in a QSFP28 port?
Most QSFP28 ports accept 40G QSFP+ modules, running at 40G. Check your switch documentation or ask us to confirm.
Which connector does 40G LR4 use?
LR4 uses a standard LC duplex connector over single-mode fiber, with four wavelengths multiplexed inside the module.
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