HB158-21U6S12-xxM-01 Series
HYBRIFLEX® Hybrid Feeder Cabling Solution 6x12, 4AWG, 1-5/8”, Single-Mode Fiber, DLC to ODC, with 6AWG DC breakout top

Rev : G | Rev date : 11 May 2022


RFS’ HYBRIFLEX Remote Radio Head (RRH) hybrid feeder cabling solution combines optical fiber and DC power for RRHs in a single lightweight aluminum corrugated cable, making it the world’s most innovative solution for RRH deployments. It was developed to reduce installation complexity and costs at Cellular sites.

HYBRIFLEX allows mobile operators deploying an RRH architecture to standardize the RRH installation process. HYBRIFLEX combines optical fiber (multi-mode or single-mode) and power in a single corrugated cable. It eliminates the need for junction boxes and can connect multiple RRHs with a single feeder. Standard RFS CELLFLEX® accessories can be used with HYBRIFLEX cable. Both pre-connectorized and on-site options are available.


  • Aluminum corrugated armor with outstanding bending characteristics – Minimizes installation time and enables mechanical protection and shielding
  • Armored fiber optic breakout – Preserves the integrity of the fiber and provides mechanical/environmental protection
  • Same accessories as 1-5/8" coaxial cable
  • Outer conductor grounding – Utilizes same grounding methods as coaxial cable
  • Lightweight solution and compact design – Decreases tower loading
  • Robust cabling – Eliminates need for expensive cable trays and ducts
  • Installation of tight bundled fiber optic cable pairs directly to the RRH – Reduces CAPEX and wind load by eliminating need for interconnection
  • Optical fiber and power cables housed in single corrugated cable – Saves CAPEX by standardizing RRH cable installation and reducing installation requirements
  • Outdoor, black PE jacket – Ensures long-lasting cable protection
  • Shielded DC wire – Jacketed and braided cable on top breakout provides grounding and EMI protection
  • Maximum robustnessFully armored cable includes riser trunk and top outdoor breakout



Cable Type   HYBRIFLEX®
Size   1-5/8"

Mechanical Specifications 

Outer Diameter Nominal mm (in) 50.7 (1.99)
Cable Weight kg/m (lb/ft) 3.42 (2.3)
Minimum Bending Radius, Single Bend mm (in) 250 (10)
Minimum Bending Radius, Multiple Bends mm (in) 500 (20)
Recommended / Maximum Clamp Spacing m (ft) 1 / 1.2 (3.25 / 4)

Armor Specifications

Armor Type   Corrugated Aluminum
Maximum DC-Resistance of Armor Ω/km (Ω/kft) 0.58 (0.178)
Diameter Corrugated Armor mm (in) 46.4 (1.83)

Cable Jacket 

UV-Protection Individual and External Jacket   Yes

DC Power Cable Specifications

Number of DC Pairs   6
Maximum DC-Resistance Power Cable Ω/km (Ω/kft) 0.83 (0.25)
Cross Section of Power Cable mm² (AWG) 21.1 (4)
DC Wire Jacket Material   PVC/Nylon
DC Cable Single Bending Radius mm (in) 137 (5.4)
DC Cable Diameter mm (in) 7.8 (0.308)
DC Standards (Meets or Exceeds)   For use in UL 1569, PVC Nylon, RoHS/REACH Compliant
Break-out Length (Top) mm (in) 4000 (157)
Break-out Length (Bottom) mm (in) 355 (14)
DC Cable Sealing Method   Semi-rigid flame-retardant polyolefin, with hot melt adhesive

F/O Cable Specifications

F/O Cable Type   G657-A1 Single Mode, Bend Tolerant
Number of F/O Pairs   12
Core/Clad µm 9/125
Secondary Protection Nominal µm (in) 900 (0.035)
Single Bending Radius mm (in) 157 (6.2)
Cable Diameter   5.512 (0.217)
F/O Standards (Meets or Exceeds)   UL Listed Type OFNR (UL1666), RoHS Compliant
Optical Loss dB/Km 0.5 @ 1310 nm
0.5 @ 1550 nm
Fiber Termination End 1   ODC plug
Fiber Termination End 2   DLC connector
FO Break-out Length (Top) mm (in) 914 (36)
FO Break-out Length (Bottom) mm (in) 1670 (65.7)
Cable Sealing Method   Semi-rigid flame-retardant polyolefin, with hot melt adhesive

Testing and Environmental

Storage Temperature °C (°F) -40 to 70 (-40 to 158)
Operation Temperature °C (°F) -40 to 65 (-40 to 149)
Installation Temperature °C (°F) -20 to 65 (-4 to 149)

Assembly Loss 

Optical Insertion Loss, Riser or Jumper Tested Individually Riser or Jumper 0.4 dB typical @1310/1550nm

System Loss 

Optical Insertion Loss, Riser and Jumper Connected in Series Total, End to End 0.7dB typical / 1.25dB max @1310/1550nm


Installation Guidelines: Download

On-line Factory Test Results: View




Nominal length equals length of trunk not including top and bottom breakouts; breakout lengths add additionally to the total assembly length tip to tip

Top Breakout - DC Power Cable Specifications:    

  • No of DC pairs 6; Specifications per 1 pair: 
  • Maximum DC-Resistance Power Cable Ω/km (Ω/ft) 1.4 (0.42), 
  • Cross Section of Power Cable mm2 (AWG) 13.3 (6), 
  • Overall Cable Diameter mm (in) 11.5 (0.453), 
  • DC Cable Jacket Material PVC, 
  • EMI Shield Tinned Copper Braid

Additional Assembly Lengths 

Model Number Length (m)
HB158-21U6S12-40M-01 40
HB158-21U6S12-50M-01 50
HB158-21U6S12-60M-01 60
HB158-21U6S12-70M-01 70
HB158-21U6S12-80M-01 80
HB158-21U6S12-90M-01 90
HB158-21U6S12-100M-01 100
HB158-21U6S12-110M-01 110
HB158-21U6S12-120M-01 120
HB158-21U6S12-130M-01 130


All Kits include an above cable assembly plus predefined quantities of grounding kit(s) and hoisting grip(s)

Kit Assembly Lengths 

Length (m) Model Number Grounding Kit GK Qty Hoisting Grip HG Qty
40 HB158-21U6S12-40M-KIT-01 GKFORM60-158 3 HOIST1-158L 2
50 HB158-21U6S12-50M-KIT-01 3 2
60 HB158-21U6S12-60M-KIT-01 3 2
70 HB158-21U6S12-70M-KIT-01 4 4
80 HB158-21U6S12-80M-KIT-01 4 4
90 HB158-21U6S12-90M-KIT-01 4 4
100 HB158-21U6S12-100M-KIT-01 5 4
110 HB158-21U6S12-110M-KIT-01 5 4
120 HB158-21U6S12-120M-KIT-01 5 4
130 HB158-21U6S12-130M-KIT-01 6 6