UL 1659 PTFE Wire — 250°C / 600V High Temperature Insulation, Horizontal Flame — México
Style 1659 is the PTFE-insulated high-temperature wire within UL Subject 758 — the highest-rated fluoropolymer wire in the AWM family for combined temperature and voltage performance. Rated 250°C continuous and 600 Vac, with PTFE (TFE) insulation certified under UL Subject 758, this wire operates reliably in thermal environments that exceed the limits of FEP, PFA, silicone rubber, and all PVC-insulated wire families. For Mexican industrial equipment manufacturers and importers, Style 1659 is the specification answer when both 250°C thermal integrity and 600V dielectric performance must be maintained simultaneously — a requirement found in industrial furnace wiring, high-temperature motor leads, and process heating system internals.
Optional mica tape wrap and treated glass braid coverings extend mechanical protection without compromising the 250°C thermal rating, making Style 1659 suitable for the most demanding internal wiring environments across México’s industrial manufacturing and process industry sectors.
Technical Specifications — UL Style 1659
| Parameter | Value |
|---|---|
| UL Style | 1659 |
| UL Subject | 758, Section 1 |
| Temperature Rating | 250°C |
| Voltage Rating | 600 Vac |
| Flame Rating | Horizontal flame |
| Optional Ratings | Oil Resistant 80°C / Gasoline Resistant |
| AWG Range | 26 AWG – 4/0 AWG, solid or stranded round |
| Conductor | Solid or stranded round copper |
| Insulation Material | PTFE (TFE — polytetrafluoroethylene) |
| Insulation Thickness — 26–10 AWG | 20 mils min average / 18 mils min at any point |
| Insulation Thickness — 8–2 AWG | 30 mils min average / 27 mils min at any point |
| Insulation Thickness — 1–4/0 AWG | 45 mils min average / 40 mils min at any point |
| Optional Covering | Mica tape wrap / Treated glass braid |
| Typical Use | Internal wiring (cableado interno de alta temperatura) |
| Available Colors | White, red, yellow, green, blue, brown, black (custom on request) |
| Standard Spool Length | 100 m / 200 m / 305 m |
| MOQ | Contact for quote — consultar cotización |
Extreme Temperature Applications — Alta Temperatura en la Industria Mexicana
Style 1659’s 250°C / 600V rating combination opens application categories unavailable to any other single-conductor AWM wire style. In México’s industrial and process equipment sectors, this wire serves:
- Industrial furnace and kiln internal wiring — lead wires inside industrial heat treatment furnaces, ceramic kilns, and glass annealing ovens operating at sustained internal temperatures above 200°C, where PTFE insulation maintains structural and dielectric integrity while FEP and silicone rubber constructions approach or exceed their thermal limits. Widely needed in México’s automotive parts heat treatment and ceramics manufacturing sectors.
- High-temperature motor lead wiring — winding leads and terminal connection wires in motors operating in hot environments — pump motors in process heating systems, conveyor motors in industrial ovens, and compressor motors in high-ambient industrial applications across México’s petrochemical and food processing industries in Veracruz, Tamaulipas, and Nuevo León.
- Process heating system interconnects — internal wiring between heating element terminals, temperature controllers, and safety cutout switches in industrial process heaters, plastic injection molding barrel heaters, and extruder heater band control circuits used extensively in México’s plastics processing industry concentrated in Estado de México, Querétaro, and Guanajuato.
- Aerospace and defense MRO supply in México — maintenance, repair, and overhaul operations for aircraft and military equipment at facilities across México require PTFE-insulated wire meeting UL recognition standards for internal wiring replacements in high-temperature airframe zones and engine compartment areas where 250°C-rated wire is the minimum acceptable specification.
Engineering Notes — PTFE vs. Other High-Temperature Insulations
PTFE at 250°C — the fluoropolymer ceiling: Among the fluoropolymer insulation materials used in UL AWM wire — FEP at 200°C (Style 1332), PFA at 250°C (Style 10362), and PTFE at 250°C (Style 1659) — PTFE offers the highest continuous use temperature alongside exceptional chemical resistance. Unlike FEP which is melt-processable and extruded, PTFE is typically applied by paste extrusion or tape wrapping, resulting in a slightly different surface texture and wall structure. Both PTFE and PFA reach 250°C, but PTFE’s track record in industrial wire applications and its wider availability in the AWM market make it the more commonly specified option for extreme-temperature internal wiring.
Insulation wall scales with AWG: Style 1659 uses a three-tier insulation wall specification — 20 mils for 26–10 AWG, 30 mils for 8–2 AWG, and 45 mils for 1–4/0 AWG. The wall increases proportionally with conductor size to maintain dielectric integrity across the full 600V rating at heavier gauges. Confirm the exact wall thickness for your specified AWG against the table above when calculating overall wire outer diameter for harness routing and conduit fill planning.
Optional mica tape wrap for fire-survival wiring: The optional mica tape wrap covering adds fire-circuit survival capability to Style 1659 — mica maintains its insulating properties even after the PTFE insulation has been consumed in a fire event. For industrial wiring paths that must remain functional during a fire emergency — safety interlock circuits, emergency shutoff leads, and alarm system wiring inside high-temperature industrial equipment — specifying the mica tape option transforms Style 1659 into a fire-survival capable wire construction.
Chemical resistance in oil and gasoline environments: PTFE’s chemical inertness exceeds that of FEP, silicone rubber, and all thermoplastic insulations. The optional gasoline-resistant and 80°C oil-resistant ratings extend Style 1659’s deployment into fuel and oil-wetted environments — generator set enclosures, marine engine rooms, and petroleum processing equipment where both extreme temperature and chemical exposure occur simultaneously. No other single UL AWM wire style combines 250°C, 600V, and gasoline resistance in a single certified construction.
Related UL Styles for Comparison
UL 1659 PTFE buyers commonly cross-reference: UL 1332 (200°C / 300V FEP, lower temperature and voltage fluoropolymer for less demanding high-temperature applications), UL 10362 (250°C / 600V PFA, alternative fluoropolymer at same temperature and voltage class with superior surface smoothness), UL 3071 (200°C / 600V silicone rubber, flexible alternative for high-temperature wiring where flexibility is prioritized over chemical resistance), and UL 5107 (200–450°C / 600V mica tape, for extreme temperature applications exceeding PTFE’s 250°C ceiling).
Request a Quote — Solicitar Cotización
Submit your AWG, optional covering specification, color, spool format, and annual volume estimate below. Our bilingual team responds with a formal cotización within 24 business hours. Wire samples available for qualification testing upon request.
