UL 5359 Mica Wire — 200–450°C / 600V, Multi-Conductor Assembly — High-Temp Cable México
Style 5359 extends the 600V mica wire specification to the finest gauge in the family — starting at 30 AWG — and provides the most complete multi-conductor assembly capability among the high-temperature mica wire styles. Rated 200°C or 450°C and 600 Vac, with mica tape and glass braid insulation at the thinnest wall profile of any 600V-rated mica construction at fine gauges, Style 5359 addresses the instrumentation and multi-circuit control cable applications in high-temperature industrial equipment where multiple conductors must be routed together in a single cable assembly through furnace wall penetrations, kiln structure passages, and DCS cabinet conduit entries.
For Mexican industrial process control system integrators, DCS engineering firms, and kiln equipment importers, Style 5359 delivers the combination of 450°C thermal rating, 600V insulation integrity, fine-gauge capability down to 30 AWG, and multi-conductor assembly option that defines the complete high-temperature instrumentation cable specification for México’s most advanced industrial process control installations.
Technical Specifications — UL Style 5359
| Parameter | Value |
|---|---|
| UL Style | 5359 |
| UL Subject | 758, Section 5 |
| Temperature Rating | 200°C or 450°C |
| Voltage Rating | 600 Vac |
| Flame Rating | Horizontal flame |
| AWG Range | 30 AWG – 4/0 AWG (solid or stranded 26–8 AWG; stranded only above 8 AWG) |
| Conductor | Solid or stranded copper |
| Insulation System | Mica tape with glass braid treated with silicone varnish or PTFE finish |
| Insulation — 30–12 AWG | Mica 16 mils min avg + Glass braid 7 mils min avg |
| Insulation — 11–4 AWG | Mica 20 mils min avg + Glass braid 15 mils min avg |
| Insulation — 3–4/0 AWG | Mica 25 mils min avg + Glass braid 20 mils min avg |
| Optional Shield | 36–30 AWG Type “A” Nickel / 27% min nickel-coated copper |
| Optional Assembly | Multi-conductor cabled, max OD 1.500 inches; mica glass binder and/or fiberglass fillers |
| Optional Covering | Treated glass braid over assembly |
| Typical Use | Internal wiring — not subjected to repeated flexing or mechanical abuse (cableado interno multi-conductor de alta temperatura) |
| Available Colors | Natural mica/glass (standard); custom on request |
| Standard Spool Length | 50 m / 100 m |
| MOQ | Contact for quote — consultar cotización |
Multi-Conductor High-Temperature Applications — Sistemas de Control DCS en México
Style 5359’s fine-gauge range, thin-wall construction, and multi-conductor assembly capability serve the most technically demanding high-temperature instrumentation and control cable applications across México’s process industries:
- Multi-point thermocouple measurement cable assemblies — multi-conductor cable assemblies routing 4, 6, or 8 thermocouple pairs from multiple measurement points in industrial kilns and furnaces across Baja California’s ceramics and specialty materials manufacturing sector to a single DCS input card, where the multi-conductor assembly option of Style 5359 reduces the number of individual cable penetrations through kiln structure walls from 8–16 individual cables to a single multi-conductor assembly penetration — a critical installation simplification in kiln structures where every penetration is a potential thermal bridge and structural weakness.
- Industrial furnace DCS control cable runs — multi-conductor control cables routing PID controller output signals, safety interlock circuit wiring, and zone control command signals from DCS marshalling cabinets through high-temperature cable trays to field junction boxes mounted on furnace structure in heat treatment and glass manufacturing facilities across Sonora’s industrial manufacturing corridor, where the 450°C rated cable assembly must maintain all circuit integrity through the heated cable tray zone between the furnace structure boundary and the cooler cable routing zone.
- Cement and lime kiln monitoring cable assemblies — multi-conductor instrumentation cable assemblies for kiln shell scanning systems, tire and riding ring temperature monitoring circuits, and kiln drive system feedback wiring in rotary cement and lime kilns across Durango’s cement production industry, where monitoring system cable assemblies must survive sustained high-temperature exposure in the kiln shell proximity zone while carrying multiple low-level analog signal circuits within a single cable assembly routed through the kiln structure support framework.
- High-temperature reactor vessel instrumentation wiring — multi-conductor signal cable assemblies for pressure transmitter leads, level sensor signal circuits, and safety interlock wiring inside high-temperature chemical reactor vessels and autoclave systems in Baja California’s specialty chemical manufacturing facilities, where reactor internal temperatures at instrumentation nozzle routing positions require 450°C-rated wire and the 600V insulation rating provides safety margin for instrumentation circuits operating in the 24–120V signal voltage range within the same cable assembly as 480V control voltage circuits.
Engineering Notes — Thinnest 600V Mica Wall and Multi-Conductor Assembly Design
16-mil mica layer — thinnest 600V-rated mica construction: At 30–12 AWG, Style 5359 specifies 16 mils minimum average mica layer — the thinnest mica insulation wall among all 600V-rated mica styles in Subject 758. Compare: Style 5107 specifies 25 mils, Style 5335 specifies 23 mils, and Style 5476 specifies 17 mils at the fine-gauge tier. The 16-mil wall of Style 5359 produces the smallest overall wire outer diameter at equivalent AWG among the 600V mica styles — a meaningful advantage when multiple conductors are assembled into a cable where overall assembly OD is constrained by the 1.500 inch maximum diameter limit. More conductors can be included within the 1.500 inch OD limit using 5359’s thin-wall construction than with any other 600V mica style, enabling higher circuit density in the same cable assembly cross-section.
Multi-conductor assembly design considerations: When designing a multi-conductor assembly using Style 5359, the conductor count within the 1.500 inch maximum OD limit depends on individual conductor AWG and the cabling lay configuration. For 24 AWG conductors with 16-mil mica and 7-mil glass braid, the insulated conductor OD is approximately 0.090–0.095 inches — allowing 7–9 conductors plus mica glass binder and fiberglass fillers within the 1.500 inch assembly limit in a standard round cable configuration. For 18 AWG conductors at the same wall, OD increases to approximately 0.120–0.130 inches, allowing 4–6 conductors within the same assembly limit. Contact CableApex engineering with your specific conductor count, AWG, and circuit configuration for a custom assembly OD calculation before finalizing the design specification.
PTFE finish on glass braid — enhanced chemical resistance: The glass braid treatment option for Style 5359 includes both silicone varnish and PTFE finish alternatives. The PTFE-finished glass braid provides significantly higher chemical resistance than silicone varnish treatment — PTFE’s inertness to acid vapors, hydrocarbon compounds, and aggressive industrial atmospheres extends the wire’s service life in chemically aggressive high-temperature environments including petrochemical fired heater zones and ceramic kiln atmospheres containing sulfur or fluoride compounds. Specify the PTFE finish option for all applications in chemically aggressive industrial environments.
30 AWG fine-gauge capability for thermocouple applications: The 30 AWG lower end of Style 5359’s conductor range enables its use for thermocouple extension lead wiring — where fine conductor cross-section is standard practice to minimize the thermal mass at the measurement junction and reduce the mechanical stiffness of the lead wire at the thermocouple head mounting position. At 30 AWG with 16-mil mica and 7-mil glass braid, the overall insulated conductor OD is approximately 0.070–0.075 inches — a compact profile suitable for routing through standard thermocouple head terminal blocks in high-temperature measurement assemblies.
Related UL Styles for Comparison
UL 5359 multi-conductor buyers commonly cross-reference: UL 5335 (450°C / 600V mica, higher mica wall thickness for applications requiring maximum insulation robustness at 600V), UL 5360 (200–450°C / 300V mica tape, lower voltage single conductor alternative at same temperature class), UL 5476 (450°C / 600V mica tape, alternative 600V construction with 17-mil mica wall at fine gauge), and UL 5128 (450°C / 300V mica, lower voltage multi-conductor alternative with stainless steel braid option).
Request a Quote — Solicitar Cotización
Submit your AWG, conductor count, temperature rating (200°C or 450°C), shield requirement, glass braid finish (silicone varnish or PTFE), spool format, and annual volume estimate below. Our engineering team responds with a formal cotización and custom assembly OD calculation within 24 business hours.
