128GFC QSFP28 eSR4 VCSEL 850nm 300m Optical Transceiver (Industrial Grade Optional)

GIGALIGHT 128GFC QSFP28 eSR4 optical transceiver modules are used for short-haul interconnections between network devices in internal storage areas of data centers. They are compliant with 128GFC/4x32GFC transport protocols, and are compatible with 40G/100G Ethernet, InfiniBand FDR/EDR, and OTN OTU4 transport protocols. The series is an enhanced version of the 128GFC QSFP28 SR4, which uses 4 pairs of parallel multimode fiber transmission with a central wavelength of 850nm for distances of up to 200m (OM3) or 300m (OM4), with an optional industrial-grade operating temperature range.


  • Hot-pluggable, full-duplex transceiver module packaged in QSFP28 form factor
  • 4 channels 850nm VCSEL transmitter and PIN ROSA
  • Transmission rates of up to 28.05Gbps per channel
  • Built-in CDR circuitry on receive and transmit channels, supports CDR bypass
  • Compliant with QSFP28 MSA and 128GFC/4x32GFC transport protocols
  • Compliant with InfiniBand EDR and OTN OTU4 transport protocols
  • Backward compatible with IEEE 802.3ba 40GBASE-SR4 and InfiniBand FDR transport protocols
  • Up to 200m (OM3) or 300m (OM4) with FEC using 4 parallel pairs of multimode fiber optic transmission
  • Power consumption less than 2W
  • MPO12 optical connectors
  • Commercial and industrial grade operating temperature range
  • Supply voltage 3.3V
  • RoHS compliant (lead-free)
P/N Description
GQS-MPO111-eSR4C 100GE/OTU4/128GFC QSFP28 SR4 VCSEL 850nm 300m Optical Module
GQS-MPO111-eSR4T Industrial-grade 100GE/OTU4/128GFC QSFP28 SR4 VCSEL 850nm 300m Optical Module

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