CAB-Q-S-0.5M 40G QSFP+ to 4x10G SFP+ DAC Passive Direct Attach Copper Breakout Cable (0.5 meter)

40GBASE-CR4 QSFP+ to four10GBASE-CU SFP+ direct attach breakout cable  0.5 meter passive AWG 30

CAB-Q-S-0.5M contains a QSFP+ module at one end and 4 SFP+ modules at the other ends. It has been tested and programmed at the factory to ensure the quality, high performance, and compatibility.

Bridge the gap between your 10G and 40G capable switches/host adapters

QSFP+ to 4 x SFP+ breakout active optical cables (AOC) is designed for the interconnect between 40G
Ethernet (40GbE) and 10G Ethernet (10GbE) applications., 

Which is also known as QSFP+ splitter AOC or QSFP+ Fan-out AOC. The QSFP+ to 4x SFP+ breakout AOC offers four parallel, bi-directional channels each operating at up to 10.3125 Gbps.

Using industry-leading VCSEL technology, an advanced new light-engine design, and bend-insensitive multimode fiber, this AOC delivers exceptional cost and performance value for 10GbE and 40GbE applications at distances up to 300 meters.