1×4 QSFP+ cage with heat sink, ESFP14041801 (Free Sample) 

Technical Parameters:

• Mechanical Characteristics
  Cage is keyed according to QSFP MSA
  QSFP+: SFF-8436
  Durability: 250 mating cycles min
  Connector insertion force: 40N max
  Connector withdrawal force: 30N max
• Electrical Characteristics
  Hot swappable
  Operating voltage: 3.3V
  Operating current: 0.5A
  Differential impedance: 100Ω±10Ω
  DWV: 300V AC
  Insulation resistance: 1000MΩ min
  Contact resistance: 70MΩ max
• Packaging
  Tape and reel packaging: connector or 1×1 cage
  Tray packing: cage of all sizes
  Outer packing: dust cover
• Signal integrity characteristics (QSFP, QSFP+)
  Return loss: -12dB
  Near-End isolation: -30dB (frequencies up to 3 GHz)
  Insertion loss: -1dB max
  Rise time for impedance measurement: 35ps
  Within pair skew: 1ps      NEXT: ≤2%