Product Hierarchy
Product Hierarchy

9859 - 78Ω Twinax, #20 TC, PO, TC Braid

78 Ohm Twinax, 20 AWG stranded (7x28) tinned copper conductor, polyethylene insulation, tinned copper braid shield (85% coverage), non-contaminating PVC jacket.

Product Overview

Suitable Applications: Harsh Environment, IIoT, Factory or Process Automation, Video, Audio, Data Communication, etc.

Physical Characteristics (Overall)

AWGStrandingMaterialNominal DiameterNo. of Conductors
207x28TC - Tinned Copper0.038 in2
Conductor Count: 2
MaterialNominal Diameter
PE - Polyethylene.079 in
Color Chart
Outer Shield
TypeMaterialCoverage [%]
BraidTinned Copper (TC)85%
Outer Jacket
MaterialNominal Diameter
PVC - Polyvinyl Chloride (Non-Contaminating)0.235 in

Electrical Characteristics

Conductor DCR
Nominal Conductor DCRNominal Conductor DCR Conductor ResistanceNominal Outer Shield DCR
9.5 Ohm/1000ft9.5 Ohm/1000ft5.3 Ohm/1000ft
Nom. Capacitance Conductor to ConductorNom. Capacitance Conductor to Other Conductor to Shield
19.7 pF/ft45.1 pF/ft
Nominal Inductance
0.119 µH/ft
Nominal Characteristic Impedance
78 Ohm
High Frequency (Nominal/Typical)
Frequency [MHz]Nom. Insertion Loss
1 MHz0.7 dB/100ft
10 MHz2.3 dB/100ft
50 MHz5.2 dB/100ft
100 MHz7.5 dB/100ft
200 MHz11 dB/100ft
400 MHz16 dB/100ft
Max. Delay SkewNominal DelayNominal Velocity of Propagation (VP) [%]
66 ns/100m1.54 ns/ft66%
Non-UL Voltage Rating
750 V
Electrical Characteristics Notes: Capacitance Conductor to Other Conductor with Shield: 45.1 pF/ft

Temperature Range

Operating Temperature Range: -40°C to +60°C

Mechanical Characteristics

Bulk Cable Weight: 30 lbs/1000ft
Max. Pull Tension: 48 lbs
Min. Bend Radius/Minor Axis: 2.4 in


CPR Euroclass: Fca
RG Type: 108
Military Compliance: MIL-DTL-17, M17/45-RG108
Qualified Products List (QPL): Yes

Applicable Environmental and Other Programs

EU Directive 2000/53/EC (ELV): Yes
EU Directive 2003/11/EC (BFR): Yes
EU Directive 2011/65/EU (RoHS 2): Yes
EU Directive 2012/19/EU (WEEE): Yes
EU Directive Compliance: Yes
EU CE Mark: No
MII Order #39 (China RoHS): Yes


Suitability - Aerial: Yes - Black only, when supported by messenger wire
Suitability - Indoor: Yes
Suitability - Outdoor: Yes - Black only


Plenum (Y/N): No

Related Part Numbers

Item #ColorPut-Up TypeLengthUPC
9859 0101000BlackReel1,000 ft612825259695

Product Notes

Notes: One conductor has a bare copper strand for identification.


Update and Revision: Revision Number: 0.335 Revision Date: 04-08-2022
Date: 2005-10-01
No accessories are available for this product