Product Hierarchy
Product Hierarchy

1855A - Serial Digital Coax, Sub-miniature, #23 Solid BC, Foil + 95% TC braid, CMR

Low Loss Serial Digital Coax, Riser-CMR, Sub-Miniature 23 AWG solid bare copper conductor, foam HDPE core, Duofoil, +95% tinned copper braid, PVC jacket

Product Overview

Suitable Applications: SMPTE 2081-1 6 Gb/s UHDTV, SMPTE 424M 3 Gb/s HD-SDI 1080P

Physical Characteristics (Overall)

AWGStrandingMaterialNominal DiameterNo. of Coax
23SolidBC - Bare Copper0.023 in1
Conductor Count: 1
MaterialNominal Diameter
PE - Polyethylene (Foam)0.102 in
Insulation, Table Note: Gas Injected
Outer Shield Material
TypeLayerMaterialMaterial Trade NameCoverage [%]
Tape1Alum / Poly / AlumDuofoil®100 %
Braid2TC - Tinned Copper95 %
Outer Jacket Material
MaterialNominal Diameter
PVC - Polyvinyl Chloride0.159 in

Electrical Characteristics

Conductor DCR
Nominal Conductor DCROuter Conductor DCR
20.1 Ohm/1000ft3.7 Ohm/1000ft
Nom. Capacitance Conductor to Shield
16.3 pF/ft
Nominal Inductance
0.107 µH/ft
Nominal Characteristic Impedance
75 Ohm
Return Loss (RL)
Frequency [MHz]Minimum Return (RL)
5 MHz - 1600 MHz23 dB
1600 MHz - 4500 MHz21 dB
4500 MHz - 6000 MHz15 dB
High Frequency (Nominal/Typical)
Frequency [MHz]Nom. Insertion Loss
1 MHz0.39 dB/100ft
3.58 MHz0.78 dB/100ft
5 MHz0.92 dB/100ft
6 MHz1.00 dB/100ft
7 MHz1.08 dB/100ft
10 MHz1.2 dB/100ft
12 MHz1.3 dB/100ft
25 MHz1.8 dB/100ft
67.5 MHz2.83 dB/100ft
71.5 MHz2.93 dB/100ft
88.5 MHz3.22 dB/100ft
100 MHz3.39 dB/100ft
135 MHz3.84 dB/100ft
143 MHz4.00 dB/100ft
180 MHz4.41 dB/100ft
270 MHz5.44 dB/100ft
360 MHz6.34 dB/100ft
540 MHz7.85 dB/100ft
720 MHz9.15 dB/100ft
750 MHz9.31 dB/100ft
1000 MHz10.89 dB/100ft
1500 MHz13.38 dB/100ft
2000 MHz15.64 dB/100ft
2250 MHz16.68 dB/100ft
3000 MHz19.65 dB/100ft
4500 MHz24.35 dB/100ft
6000 MHz28.97 dB/100ft
Nominal DelayNominal Velocity of Propagation (VP) [%]
1.24 ns/ft82 %
UL Voltage Rating
300 V RMS
Electrical Characteristics Notes: TDR Impedance: 75 +/- 1.5 Ohms
Other Electrical Characteristic 2: Return Loss: Fixed bridge and termination

Temperature Range

UL Temp Rating: 75°C
Operating Temp Range: -30°C To +75°C

Mechanical Characteristics

UV Resistance: Yes
Bulk Cable Weight: 17 lbs/1000ft
Max Recommended Pulling Tension: 33 lbs
Min Bend Radius/Minor Axis: 1.6 in


NEC/(UL) Specification: CMR
CEC/C(UL) Specification: CMG
CPR Euroclass: Eca
RG Type: Mini 59/U Type

Applicable Environmental and Other Programs

Environmental Space: Indoor - Riser
EU Directive 2000/53/EC (ELV): Yes
EU Directive 2003/96/EC (BFR): Yes
EU Directive 2011/65/EU (ROHS II): Yes
EU Directive 2012/19/EU (WEEE): Yes
EU Directive Compliance: EU Directive 2003/11/EC (BFR)
EU CE Mark: Yes
EU RoHS Compliance Date (yyyy-mm-dd): 2004-01-01
MII Order #39 (China RoHS): Yes


Suitability - Aerial: Yes - Black only, when supported by messenger wire
Suitability - Burial: No
Suitability - Hazardous Locations: No
Suitability - Indoor: Yes
Suitability - Outdoor: Yes - Black only

Flammability, LS0H, Toxicity Testing

UL Flammability: UL1666 Vertical Shaft
CSA Flammability: FT4
ISO/IEC Flammability: IEC 60332-1-2
UL voltage rating: 300 V RMS


Plenum (Y/N): No
Plenum Number: 1855P

Part Number

Related Parts: 1855ABHD3
Item #ColorPutup TypeLengthUPC
1855A 010500BlackReel500 ft612825356950
1855A 0101000BlackReel1,000 ft612825358503
1855A 010N1000BlackReel w/Small Barrel1,000 ft
1855A 010Z1000BlackReelTuff Box1,000 ft612825434993
1855A 0105000BlackReel5,000 ft612825436126
1855A 0061000Blue, LightReel1,000 ft612825358459
1855A 006N1000Blue, LightReel w/Small Barrel1,000 ft
1855A 006Z1000Blue, LightReelTuff Box1,000 ft612825434955
1855A 0065000Blue, LightReel5,000 ft612825436072
1855A 0011000BrownReel1,000 ft612825356851
1855A 001N1000BrownReel w/Small Barrel1,000 ft
1855A 0015000BrownReel5,000 ft612825436027
1855A 0081000GrayReel1,000 ft612825358510
1855A 008N1000GrayReel w/Small Barrel1,000 ft
1855A 0085000GrayReel5,000 ft612825436096
1855A N3U1000Green, MilReel1,000 ft612825358480
1855A N3UN1000Green, MilReel w/Small Barrel1,000 ft
1855A N3UZ1000Green, MilReelTuff Box1,000 ft612825435006
1855A N3U5000Green, MilReel5,000 ft612825436133
1855A 0031000OrangeReel1,000 ft612825356844
1855A 003N1000OrangeReel w/Small Barrel1,000 ft
1855A 003Z1000OrangeReelTuff Box1,000 ft612825434931
1855A 0035000OrangeReel5,000 ft612825436041
1855A 0021000RedReel1,000 ft612825358473
1855A 002N1000RedReel w/Small Barrel1,000 ft
1855A 002Z1000RedReelTuff Box1,000 ft612825434917
1855A 0025000RedReel5,000 ft612825436034
1855A 0071000VioletReel1,000 ft612825356837
1855A 007N1000VioletReel w/Small Barrel1,000 ft
1855A 007Z1000VioletReelTuff Box1,000 ft612825434962
1855A 0075000VioletReel5,000 ft612825436089
1855A 0091000WhiteReel1,000 ft612825358497
1855A 009N1000WhiteReel w/Small Barrel1,000 ft
1855A 009Z1000WhiteReelTuff Box1,000 ft612825434986
1855A 0095000WhiteReel5,000 ft612825436102
1855A 0041000YellowReel1,000 ft612825358466
1855A 004N1000YellowReel w/Small Barrel1,000 ft
1855A 004Z1000YellowReelTuff Box1,000 ft612825434948
1855A 0045000YellowReel5,000 ft612825436065
Footnote: C - CRATE REEL PUT-UP.

Product Notes

Notes: Print legend includes sequential footage marks.


Update and Revision: Revision Number: 0.297 Revision Date: 04-28-2020
Date: 2004-01-01
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