Category 3 Backbone Cable, 25 Pair, U/UTP, CMR (Category 3 Cable) – Belden (DIW25)

Features & Benefits

• Rugged Design: Cables meet and exceed ANSI/TIA-568-C.2 and CSA T529-95 specifications
• Engineered to Perform: High-value UTP cable engineered to perform to Category 3 requirements per ANSI/TIA-568-C.2

Specifications

Product Overview

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

Construction Details

Conductor

Size	Stranding	Material	No. of Pairs
24 AWG	Solid	BC – Bare Copper	25

Insulation

Material	Color Code
PVC – Polyvinyl Chloride	Western Electric

Outer Jacket

Material	Nom. Diameter	Ripcord
PVC – Polyvinyl Chloride	0.380 in (9.65 mm)	Yes

Electrical Characteristics

Electricals

Max. Conductor DCR	Max. Capacitance Unbalance
93.8 Ohm/km (28.6 Ohm/1000ft)	330 pF/100m

Delay

Frequency	Max. Delay	Max. Delay Skew	Nom. Velocity of Prop.
16 MHz	543 ns/100m	45 ns/100m	68%

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]
0.772	2.2 dB/100m	47.0	43.0	50.1	46.1
1	2.6 dB/100m	45.0	41.0	47.8	43.8	12.0	100 ± 15
4	5.6 dB/100m	36.0	32.0	36.0	32.0	12.0	100 ± 15
8	8.5 dB/100m	31.0	28.0	28.3	24.3	12.0	100 ± 15
10	9.7 dB/100m	30.0	26.0	26.2	22.3	12.0	100 ± 15
16	13.1 dB/100m	27.0	23.0	20.1	16.1	10.0	100 ± 15

Voltage

UL Voltage Rating
300 V (CMR)

Mechanical Characteristics

Temperature

UL Temperature	Operating	Installation	Storage
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 Part Numbers Item # Color Putup Type Length UPC DIW25 732CUT Olive Cut to Length 612825060611 DIW25 732CUT Olive Cut to Length 1 ft 612825060611 DIW25 732500 Olive Reel 500 ft 612825060628 DIW25 732500 Olive Reel 500 ft 612825060628 DIW25 7321000 Olive Reel 1,000 ft 612825060635 DIW25 7321000 Olive Reel 1,000 ft 612825060635 DIW25 732500B Olive Reel 1,500 ft 612825285533 DIW25 7325000 Olive Reel 5,000 ft 612825060642 DIW25 7325000 Olive Reel 5,000 ft 612825060642 Show All Parts Number Show Less

Systems to Support Key Applications
Blade Slot Selection Table