The Gigalight GQS-MPO400-SR4C is a QSFP28 transceiver module designed for use in 40G Ethernet links up to 300m (OM3) or 400m (OM4) on MMF. It is compliant with the QSFP+ MSA, IEEE 802.3ba 40GBASE-SR4, 4x10GBASE-SR, and OTU3/OTU3e2 standards. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+ MSA. The optical transceiver is RoHS compliant. Gigalight also offers 40G QSFP+ SR4 integrated with MPO pigtail (GQM-400SR4-xxx) and 40G QSFP+ SR4 integrated with LC pigtails (GQS-8LC-xxxC).


  • Hot-pluggable QSFP+ form factor
  • 4 channels full-duplex transceiver module
  • Supports 44.58Gb/s aggregate bit rate
  • 4 channels 850nm VCSEL array
  • 4 channels PIN photo detector array
  • 1.5W maximum power dissipation
  • Maximum link length of 300m on OM3 MMF or 400m on OM4 MMF
  • Single MTP/MPO receptacle
  • Built-in digital diagnostic functions
  • Operating case temperature range: 0 to 70°C
  • Single 3.3V power supply
  • RoHS-6 compliant (lead free)


  • 40GBASE-SR4 Ethernet
  • 4x10GBASE-SR Ethernet
  • OTN OTU3/OTU3e2
  • InfiniBand 4x SDR/DDR/QDR

Ordering Information

Product Description Product Number
QSFP+, 40GBASE-SR4, 44.58Gb/s, 850nm, 300m (OM3) or 400m (OM4), MMF, MPO12 GQS-MPO400-SR4C
40G QSFP+ SR4 with MPO Pigtail[1] GQM-400SR4-xxx
40G QSFP+ SR4 with 4 Duplex LC Pigtails[1] GQS-8LC-xxxC

[1]: The pigtail length can be customized. For special length reqiurements, please contact us.

download attachments : GQS-MPO400-SR4C 【Preview】