Product Hierarchy
Product Hierarchy

1865A - Serial Digital Coax, Sub-miniature, #25 Stranded BC, CMR




25 AWG stranded (19x37) .021" bare copper conductor, gas-injected foam HDPE insulation, Duofoil®; tinned copper braid shield (95% coverage), PVC jacket.

Construction Details

RG Type: Sub-miniature 59
Conductor
SizeStrandingNom. DiameterMaterial
2519x370.021 inBC - Bare Copper
Insulation
MaterialNom. Insulation Diameter
PE - Polyethylene (Foam)0.094 in (2.4 mm)
Insulation Table Notes: Gas Injected
Outer Shield
LayerOuter Shield TypeMaterialMaterial Trade NameCoverage
1TapeTri-Laminate (Alum+Poly+Alum)Duofoil®100%
2BraidTinned Copper (TC)95%
Outer Jacket
MaterialNom. Diameter
PVC - Polyvinyl Chloride0.15 in

Electrical Characteristics

Return Loss
FrequencyMin. Return Loss
5-850 MHz21 dB
850-3000 MHz18 dB
Attenuation
FrequencyNom. Attenuation
1 MHz0.47 dB/100ft
3.58 MHz1 dB/100ft
5 MHz1.1 dB/100ft
7 MHz1.3 dB/100ft
10 MHz1.6 dB/100ft
67.5 MHz3.6 dB/100ft
71.5 MHz3.7 dB/100ft
88.5 MHz4.1 dB/100ft
100 MHz4.4 dB/100ft
135 MHz5 dB/100ft
143 MHz5.1 dB/100ft
180 MHz5.8 dB/100ft
270 MHz7.1 dB/100ft
360 MHz8.2 dB/100ft
540 MHz10.1 dB/100ft
720 MHz11.8 dB/100ft
750 MHz12 dB/100ft
1000 MHz13.9 dB/100ft
1500 MHz17 dB/100ft
2000 MHz19.6 dB/100ft
2250 MHz20.8 dB/100ft
3000 MHz24 dB/100ft
Electricals
Nom. Conductor DCRNom. Outer Shield DCRNom. Capacitance Cond-to-ShieldNom. Characteristic ImpedanceNom. Velocity of Prop.
27.4 Ohm/1000ft (89.9 Ohm/km)5.4 Ohm/1000ft (18 Ohm/km)16.5 pF/ft (54.1 pF/m)75 Ohm82%
Voltage
UL Voltage Rating
300 V RMS

Mechanical Characteristics

Temperature
UL TemperatureOperating
75°C-30°C To +75°C
Max. Pull Tension: 27 lbs (12 kg)
Bulk Cable Weight: 14 lbs/1000ft (21 kg/km)

Standards and Compliance

Environmental Suitability: Indoor - Riser, Indoor
Flammability / Reaction to Fire: UL1666 Vertical Shaft
CPR Compliance: CPR Euroclass: Eca; CPR UKCA Class: Eca
NEC / UL Compliance: CMR
CEC / C(UL) Compliance: CMG
European Directive Compliance: EU CE Mark, EU Directive 2015/863/EU (RoHS 2 amendment), EU Directive 2011/65/EU (RoHS 2), EU Directive 2012/19/EU (WEEE)
UK Regulation Compliance: UKCA Mark
APAC Compliance: China RoHS II (GB/T 26572-2011)

History

Update and Revision: Revision Number: 0.428 Revision Date: 05-27-2026

Part Numbers

Variants
Item #ColorPutup TypeLengthUPCFootnote
1865A 0101000BlackReel1,000 ft612825358435C
Footnote: C - CRATE REEL PUT-UP.
Date: 2004-01-01
Belden Brochure Video Cables Updates_v1_05_26 (Revised).pdf
TB65: Digital Studio Cable Guide
No accessories are available for this product