Indoor NEMA 1-Rated Tube Distribution Units

Featuring a scalable and flexible design, Sumitomo Electric Lightwave’s Indoor NEMA 1-Rated Tube Distribution Units are wall-mountable enclosures used at tube cable transition or branching points. Tubes are joined together using push-fit connectors within the enclosure. This results in a pathway between various TDU’s or termination points within the network. In addition, optional perforated back panel kits will provide further tube and cable management.

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Physical Characteristics

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Ordering Information

DE20IDUNEMA-1STEEL84 Tubes27 lb (12.3 kg)20 x 20 x 6.5 in
(508 x 508 x 165 mm)
DE36IDUNEMA-1STEEL168 Tubes70 lb (31.8 kg)36 x 30 x 6.5 in
(915 x 762 x 166 mm)


DE20IDUPPerforated Back Panel Kit for DE20IDU.
DE36IDUPPerforated Back Panel Kit for DE36IDU.
DEIDUKEYcylinder key lock kit with two keys for DE20IDU, and DE36IDU.
DEIDUKEY2two replacement keys for DEIDUKEY.


  • protective stainless-steel frame
  • rated NEMA 1
  • hinge door secured with slotted latch
  • replacement hinge for key lock
  • Perforated Back Panel Kits for additional tube management