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40G QSFP+

40G QSFP+ LR4 Transceiver QSFP-40G-LR4-LC

40GBASE-LR4 · 1310nm · Single-mode (SMF) · Duplex LC · 10km · see note

Compatible with major switch brands — share your equipment model to confirm coding before ordering. 3-year warranty included.

Module overview

  • Hot-pluggable QSFP+ MSA form factor
  • DDM digital diagnostics for TX/RX monitoring
  • 3-year warranty · free technical support
  • Coding confirmed against your switch model

The 40GBASE-LR4 QSFP+ transceiver delivers 40 Gbps over single-mode fiber (SMF) using 1310 nm with a duplex LC connector, up to 10 km. It is hot-pluggable, QSFP+ MSA-compliant, and supports DDM digital diagnostics.

Typical deployments

40G QSFP+ remains a cost-effective aggregation layer: ToR-to-spine uplinks, 40G server adapters and legacy 40G switch ports. SR4 and eSR4 use MPO ribbon fiber at 100–300 m; IR4, LR4 and ER4 use LC duplex single-mode up to 40 km.

Before you order

Confirm your switch port is rated for 40G and uses the same 40GBASE-LR4 interface before installing. Share the switch model to confirm coding; every module ships with a 3-year warranty and free technical support.

Specifications

Model / Part NumberQSFP-40G-LR4-LC
Ethernet Standard40GBASE-LR4
Standard noteVendor specification lists 1310 nm. 40GBASE-LR4 and 40GBASE-ER4 normally use four CWDM wavelengths (1271–1331 nm); confirm the datasheet before ordering.
Data Rate40G
Wavelength1310 nm
Fiber TypeSingle-mode (SMF)
ConnectorLC
Max Reach10km
Form FactorQSFP+
DDM supportYes