• Sumitomo’s newest TN optical closure
  • Capacity of up to 5184 fibres
  • Main body assembly structure featuring buckles for easy accessibility
  • Soft rubber grommets in the cable sealing structure protect the high fibre count splices from the elements
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Product Information



  • High splice capacity underground closure
  • Best suitable to ultra-high fibre count cable up to 5,184 fibres
  • Butt joint and branch joint (2 main + 1 branch) available
  • Fully re-usable closure with soft rubber grommets at cable entries
  • Applicable cable diameter:
    • 33mm to 35mm / 1.30” to 1.38”: by standard kit in FTC-TN5184
    • 8mm to 32mm / 0.32” to 1.26”: by optional cable sealing kit M
    • IP Rating: IP68


Splice capacity• 5,184f (pliable ribbon)
• 1,728f (standard ribbon)
• 288f (loose tube)
Splice tray capacity• 216f (pliable ribbon)
• 72f (standard ribbon)
• 12f (loose tube)

Physical Characteristics

Height9.7in (246mm)
Width11.3in (293mm)
Depth24.3in (618mm)

Ordering Information

Part NumberDescription
FTC-TN5184Optical closure TN5184, capacity of 5,184 fibres, 432 x 12f ribbon splices
BRTN-MCable sealing kit M for cable with 0.31 – 1.26in (8 – 32mm) diameter