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).
- Availability
- Global
- Status
- Active
- Orderable items
- 2
Part numbers
1538A is a product family. Each item number below is a separate orderable part — colour, put-up and length differ.
| Item # | Color | UPC | Footnote | Order |
|---|---|---|---|---|
| 1538A 0081000 | Gray | 612825117612 | C | Order online |
| 1538A 008U1000 | Gray | 612825117605 | — | Order online |
Specifications
Product Overview
| Suitable Applications | For RISC Systems where energy efficiency is Key |
|---|
Construction Details
| Overall Cable Diameter (Nominal) | 0.230 in |
|---|
Conductor
| Element | Pair(s) |
|---|---|
| No. of Elements | 3 |
| Size | 28 AWG |
| Stranding | 7x36 |
| Material | BC - Bare Copper |
Insulation
| Element | Pair(s) |
|---|---|
| Material | PP - Polypropylene |
| Nom. Thickness | 0.01 in (0.25 mm) |
| Nom. Insulation Diameter | 0.035 in (0.89 mm) |
| Color Code | White & Blue, White & Orange, White & Green |
Outer Shield
| Shield Type | Material | Coverage | Drainwire Type |
|---|---|---|---|
| Tape | Bi-Laminate (Alum+Poly) | 100% | 28 AWG (7x36) TC |
| Braid | Tinned Copper (TC) | 65% |
Outer Jacket
| Material | PVC - Polyvinyl Chloride |
|---|---|
| Nom. Thickness | 0.02 in (0.51 mm) |
| Nom. Diameter | 0.230 in |
Electrical Characteristics
| Nom Outer Shield DCR | 7.88 Ohm/1000ft (25.9 Ohm/km) |
|---|
Electricals
| Nom. Conductor DCR | 70.6 Ohm/1000ft |
|---|---|
| Nom. Capacitance Cond-to-Cond | 12 pF/ft (39 pF/m) |
| Nom. Capacitance Cond-to-Other (Conds + Shield) | 21.5 pF/ft (70.5 pF/m) |
| Nom. Characteristic Impedence | 120 Ohm |
| Max. Current | 0.7 Amps per Conductor at 30oC |
High Frequency (Nominal/Typical)
| Frequency | Nom. Insertion Loss (Attenuation) [dB/100m] |
|---|---|
| 1 MHz | 17 |
| 4 MHz | 26 |
| 10 MHz | 32 |
Voltage
| UL Voltage Rating | 300 V |
|---|
Mechanical Characteristics
| Max. Pull Tension | 33.9 lbs (15.4 kg) |
|---|---|
| Bulk Cable Weight | 22 lbs/1000ft |
Temperature
| UL Temperature | 60°C |
|---|---|
| Operating | -20°C to +60°C |
Bend Radius
| Stationary Min. | 2.30 in (58.4 mm) |
|---|---|
| Installation Min. | 2.30 in |
Standards and Compliance
| Environmental Suitability | Indoor, Indoor |
|---|---|
| Flammability / Reaction to Fire | UL1685 UL Loading |
| CPR Compliance | CPR Euroclass: Eca |
| NEC / UL Compliance | Article 725, CL2 |
| European Directive Compliance | 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) |
| Other Standard Compliance(s) | IBM Part No. N Cable, RJ-45 compatible |
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. |
|---|
History
| Update and Revision | Revision Number: 0.427 Revision Date: 09-07-2025 |
|---|---|
| Footnote | C - CRATE REEL PUT-UP. |
Resources
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