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#1 Source in low voltage wire and cable. Call us today to learn more about special offers.
#1 Source in low voltage wire and cable. Call us today to learn more about special offers.

Loose Tube Plenum Fiber Optic Cable, Single Mode OS2, Corning Fiber, Indoor/Outdoor

SKU: FB21-3746-S6P
Strand Count

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This product has a minimum $50 associated cut fee applied to the shipping cost

Various lead times may apply to this product. Please contact us for more details.
Made in USA UL Listed RoHS Compliant Made with Corning Glass

(We do not offer credits or returns for this item.)

Minimum and Maximum Order Lengths for Non-Freight Shipments:
  6 & 12 Fibers 24 & 48 Fibers 72 Fibers
Min. 1,700ft. (518m) Call For Quote Call For Quote
Max. 3,100ft. (945m) Call For Quote Call For Quote

Note: 6 & 12 Fiber over 3,100ft and all 24, 48 & 72 fiber must ship freight and requires a quote.
To request a quote or inquire about our custom fiber give us a call.


Dry Loose Tube OS2 9/125 Single Mode Fiber Optic Cable, Plenum OFNP

This plenum dry loose tube fiber cable is composed of one to six sub-units, water blocking yarn, an optional central strength member, water blocking tape (only for 72 fiber), an aramid ripcord, and a PVC outer jacket. Each sub-unit consists of 12 colored glass fibers and water swellable yarn with a PVC jacket 3mm in diameter. All component materials meet the EU RoHS and REACH Directive standards. Sub-units can be color-coded or sequentially numbered.

The plenum dry loose tube fiber cable is available in 12 TIA standard colors or special order colors. The fiber cable is UL Listed OFNP for use in ducts, plenums and air-handling spaces. Standard surface print denotes construction, NEC rating, and fiber type, and includes footage markers. Custom print can also be accommodated.

Cleaning your fiber connector end faces and components regularly is crucial for avoiding a total network failure. Ensure your optical fiber system is working properly and prevent major network issues with fiber cleaning kits, pens, fluids, and wipes.



  • Gel-free waterblocked design.
  • UV protected rugged jacket.
  • 6 thru 72 fiber count.
  • Available in all fiber types including 10 gigabit.


  • Plenum
  • Duct
  • Indoor/Outdoor

Flame Rating

  • NFPA262



Temperature Range

  • Storage Temperature: -40ºC to +70ºC
  • Operating Temperature: -40ºC to +70ºC

Cable Characteristics

  • Fiber Count: 2-12, 24, 48, or 72
  • Outer Jacket Material: Flame Retardant PVC
  • Buffer Tubes:  Flame Retardant PVC
  • Strength Member: Aramid Yarn
  • Central Strength Member (N/A 2-12Fiber): Fiber Reinforced Rod
  • Coating on Central Strength Member: Flame Retardant PVC

Physical Characteristics

Nominal Outer Diameter

  • 2-12 Strand: 4.8 mm
  • 24 Strand: 8.5 mm
  • 48 Strand: 8.5 mm
  • 72 Strand: 10.4 mm


  • 2-12 Strand: 78 (lbs/km)
  • 24 Strand: 150  (lbs/km)
  • 48 Strand: 182  (lbs/km)
  • 72 Strand: 252  (lbs/km)

Minimum Bend Radius (Installation)

  • 2-12 Strand: 7.2 cm
  • 24 Strand: 12.8 cm
  • 48 Strand: 12.8 cm
  • 72 Strand: 15.6 cm

Minimum Bend Radius (Operation)

  • 2-12 Strand: 4.8 cm
  • 24 Strand: 8.5 cm
  • 48 Strand: 8.5 cm
  • 72 Strand: 10.4 cm

    Optical Characteristics

    • Core Size: 9 um
    • Wavelength: (1310/1550) nm
    • Max. Attenuation: (0.5/0.4) dB/km
    • Bandwidth (EMB) (High Performance): N/A
    • Link Length (m): 10,000/5,000 (1/10 Gb/s @ 1550nm)

    Additional Information

    Additional Information

    Single mode fiber cable (Synonyms mono-mode optical fiber, single-mode fiber, single-mode optical waveguide, uni-mode fiber) is a single strand of glass fiber with a diameter of 8.3 to 10 microns that has one mode of transmission. Single mode fiber has a relatively narrow diameter, through which only one mode will propagate typically 1310 or 1550nm wavelengths. Single mode fibers carry higher bandwidth than multimode fiber, but require a light source with a narrow spectral width. Single-mode fiber gives you a higher transmission rate and up to 50 times more distance than multimode. The small core and single light-wave virtually eliminate any distortion that could result from overlapping light pulses, providing the least signal attenuation and the highest transmission speeds of any fiber cable type.