Product Hierarchy
Product Hierarchy

1538A - RISC 6000, #28-3pr, BC, PO, O/A Foil+Braid, PVC Jkt, CL2, 120Ω

RISC 6000 IBM N Cable, 28 AWG stranded (7x36) bare copper conductors, patented step polyolefin insulation, twisted pairs, overall Beldfoil® shielded + tinned copper braid shield (65% coverage), tinned copper drain wire, PVC jacket (see RISC color code chart below).

Physical Characteristics (Overall)

AWGStrandingMaterialNo. of Pairs
287x36BC - Bare Copper3
Conductor Count: 6
LayerMaterialNominal Wall Thickness
1PP - Polypropylene0.01 in
2PE - Polyethylene0.005 in
Color Chart
1White over Blue & Blue over White
2White over Orange & Orange over White
3White over Green & Green over White
Outer Shield Material
TypeLayerMaterialMaterial Trade NameCoverage [%]Drainwire MaterialDrainwire AWGDrainwire Construction n x D
Tape1Bi-Laminate (Alum+Poly)Beldfoil®100%TC - Tinned Copper287x36
Braid2Tinned Copper (TC)65%
Outer Jacket Material
MaterialNominal DiameterNominal Wall Thickness
PVC - Polyvinyl Chloride0.23 in0.02 in

Electrical Characteristics

Conductor DCR
Nominal Conductor DCRNominal Outer Shield DCR
63 Ohm/1000ft5.5 Ohm/1000ft
Nom. Capacitance Conductor to ConductorNom. Capacitance Conductor to Other Conductor to Shield
12 pF/ft21.5 pF/ft
Nominal Characteristic Impedance
120 Ohm
High Frequency (Nominal/Typical)
Frequency [MHz]Nom. Insertion Loss
1 MHz17 dB/100m
4 MHz26 dB/100m
10 MHz32 dB/100m
High Freq
Frequency [MHz]Min. NEXT [dB]
1 MHz60 dB
4 MHz50 dB
10 MHz45 dB
16 MHz40 dB
Max. Recommended Current [A]
0.9 Amps per Conductor at 25ºC
UL Voltage Rating
150 V RMS

Mechanical Characteristics

Bulk Cable Weight: 22 lbs/1000ft
Min Bend Radius/Minor Axis: 2.5 in


Customer Reference Document: IBM P/N: N Cable
NEC/(UL) Compliance: CL2
Other Compliance: RJ-45 compatible

Applicable Environmental and Other Programs

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 RoHS Compliance Date (yyyy-mm-dd): 2004-01-01
MII Order #39 (China RoHS): Yes

Flammability, LS0H, Toxicity Testing

UL Flammability: UL1685 UL Loading
UL voltage rating: 150 V RMS


Plenum (Y/N): No

Part Number

Item #ColorUPC
1538A 0081000Gray612825117612
1538A 008U1000Gray612825117605
Footnote: C - CRATE REEL PUT-UP.

Product Notes

Notes: US Patent # 5,220,130. Single conductors are dually insulated. The outer layer of insulation must be stripped off before attaching modular connectors.


Update and Revision: Revision Number: 0.260 Revision Date: 09-30-2020
Date: 2004-01-01
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