A QSFP is a Quad (4-channel) small form factor hot pluggable fibre optical transceiver used for 40 Gigabit Ethernet (40GbE) data communications applications. 

The QSFP significantly increases the port-density by 4x compared to SFP+ form factor. 40G QSFP+ transceivers include SR4, eSR4, LX4, LR4 Lite, IR4 PSM, LR4 PSM, LR4, ER4 and BiDi series.

Compliant with the following standards & protocols

  • IEEE 802.3ba
  • SFF-8436 (QSFP+)
  • SFF-8635 (QSFP+ 10Gb/s 4X Pluggable Transceiver Solution)       
  • SFF-8663 (QSFP+ 28Gb/s Cage)
  • SFF-8683 (QSFP+ Cage)


  • Supports distances of between 100m and 40km MTP/MPO optical connector
  • High-speed interconnection between switches, routers and transport equipment
  • 40GBASE-LR4 Ethernet links
  • 10GBASE-SR applications
  • 40GBASE-SR4 applications
  • 40GBASE-ER4 Ethernet links
  • InfiniBand SDR, DDR and QDR applications
  • Single 3.3V Power Supply
  • Hot-Pluggable
  • Low power consumption
  • Commercial Temperature Range 0~70°C