Product Hierarchy
Product Hierarchy

DIW25 - Category 3 Backbone Cable, 25 Pair, U/UTP, CMR




Category 3 Premise Backbone Cable (16MHz), DIW 25 Pair, 24 AWG Solid Bare Copper Conductors, U/UTP, Riser-CMR, PVC jacket

Product Overview

Suitable Applications: Premise Backbone Cable, Ethernet 10BASE-T, Analog Phone, FAX

Construction Details

Conductor
SizeStrandingMaterialNo. of Pairs
24 AWGSolidBC - Bare Copper25
Insulation
MaterialColor Code
PVC - Polyvinyl ChlorideWestern Electric
Outer Jacket
MaterialNom. DiameterRipcord
PVC - Polyvinyl Chloride0.380 in (9.65 mm)Yes

Electrical Characteristics

Electricals
Max. Conductor DCRMax. Capacitance Unbalance
93.8 Ohm/km (28.6 Ohm/1000ft)330 pF/100m
Delay
FrequencyMax. DelayMax. Delay SkewNom. Velocity of Prop.
16 MHz543 ns/100m45 ns/100m68%
High Frequency
Frequency [MHz]Max. Insertion Loss (Attenuation)Min. NEXT [dB]Min. PSNEXT [dB]Min. ACR [dB]Min. PSACR [dB]Min. RL (Return Loss) [dB]Max./Min. Fitted Impedance [Ohm]
0.7722.2 dB/100m47.043.050.146.1
12.6 dB/100m45.041.047.843.812.0100 ± 15
45.6 dB/100m36.032.036.032.012.0100 ± 15
88.5 dB/100m31.028.028.324.312.0100 ± 15
109.7 dB/100m30.026.026.222.312.0100 ± 15
1613.1 dB/100m27.023.020.116.110.0100 ± 15
Voltage
UL Voltage Rating
300 V (CMR)

Mechanical Characteristics

Temperature
UL TemperatureOperatingInstallationStorage
60°C-30°C To +60°C-30°C To +60°C-30°C To +60°C
Bend Radius
Stationary Min.Installation Min.
4.0 in (100 mm)7.75 in (197 mm)
Max. Pull Tension: 150 lbs (68 kg)
Bulk Cable Weight: 100 lbs/1000ft

Standards and Compliance

Environmental Suitability: Riser, Indoor
Flammability / Reaction to Fire: UL 1666 Riser, FT4, IEC 60332-1-2
CPR Compliance: CPR Euroclass: Eca; CPR UKCA Class: Eca
NEC / UL Compliance: CMR
CEC / C(UL) Compliance: CMR
ICEA Compliance: S-90-661
NEMA Compliance: NEMA WC-63.1
Data Category: Category 3
TIA/EIA Compliance: ANSI/TIA-568.2-D Category 3
European Directive Compliance: EU CE Mark, EU Directive 2015/863/EU (RoHS 2 amendment), REACH, EU Directive 2011/65/EU (RoHS 2), EU Directive 2012/19/EU (WEEE), REACH: 2020-01-16
UK Regulation Compliance: UKCA Mark
APAC Compliance: China RoHS II (GB/T 26572-2011)
Plenum Number: DPLN25

Product Notes

Notes: Electrical values are expected performance based on cable testing and representative performance within a typical Belden system. Print Includes Descending Footage/Meter Markings.

History

Update and Revision: Revision Number: 0.588 Revision Date: 05-06-2025

Part Numbers

Variants
Item #ColorPutup TypeLengthUPC
DIW25 732CUTOliveCut to Length612825060611
DIW25 732CUTOliveCut to Length1 ft612825060611
DIW25 732500OliveReel500 ft612825060628
DIW25 732500OliveReel500 ft612825060628
DIW25 7321000OliveReel1,000 ft612825060635
DIW25 7321000OliveReel1,000 ft612825060635
DIW25 732500BOliveReel1,500 ft612825285533
DIW25 7325000OliveReel5,000 ft612825060642
DIW25 7325000OliveReel5,000 ft612825060642
Date: 2005-08-19
Belden-Copper-Catalog-2016.pdf
Copper-Structured-Cabling-Design-Guide.pdf
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