UL 3573 Dual-Insulation Ignition Wire — 200°C / 10,000 Vac, Silicone + Fiberglass + Silicone — México
Style 3573 is the dual-insulation high-voltage ignition wire within UL Subject 758 — engineered for electronic ignition applications in gas ranges and gas or fuel oil burner systems where the triple-layer construction of inner silicone rubber, fiberglass braid, and outer silicone rubber jacket provides a higher level of mechanical protection and dielectric redundancy than single-insulation alternatives. Rated 10,000 Vac and 200°C, this wire shares the same application category and voltage-temperature rating as Style 3304, but its three-layer construction addresses the more demanding mechanical environments found in industrial combustion equipment MRO operations — where ignition leads are repeatedly accessed, routed, and reconnected over the equipment service life.
For Mexican industrial MRO distributors, petrochemical equipment maintenance operations, and large boiler system importers, Style 3573 represents the premium ignition wire specification in the UL AWM family — combining the high-voltage dielectric performance of 10,000 Vac rating with the dual-layer mechanical protection architecture needed for long service life in heavy-duty industrial combustion equipment environments.
Technical Specifications — UL Style 3573
| Parameter | Value |
|---|---|
| UL Style | 3573 |
| UL Subject | 758, Section 3 |
| Temperature Rating | 200°C |
| Voltage Rating | 10,000 Vac |
| Flame Rating | Horizontal flame |
| AWG Range | 22 AWG – 12 AWG, solid or stranded round |
| Conductor | Solid or stranded round copper |
| Inner Insulation | SR-Silicone — 30 mils min average / 27 mils min at any point |
| Intermediate Layer | Fiberglass braid or serve |
| Outer Insulation | SR-Silicone — 10 mils min at any point (over braid) |
| Typical Use | Electronic ignition or similar application in gas ranges or gas/fuel oil burner systems — protected from damage (sistemas de encendido electrónico industrial) |
| Available Colors | Black, white, red (custom on request) |
| Standard Spool Length | 100 m / 200 m / 305 m |
| MOQ | Contact for quote — consultar cotización |
Engineering Notes — Dual-Insulation Architecture and MRO Serviceability
Three-layer construction — how each layer contributes: Style 3573’s insulation system works as three cooperating layers, each with a distinct function. The inner silicone rubber layer at 30 mils minimum provides the primary dielectric barrier — the main voltage-withstand capability of the construction at 10,000 Vac. The intermediate fiberglass braid or serve layer serves dual purposes: it provides mechanical separation between the inner and outer silicone layers, preventing outer jacket damage from propagating to the primary insulation, and it adds abrasion resistance and dimensional stability to the overall construction. The outer silicone rubber jacket at 10 mils minimum encapsulates the fiberglass braid, preventing braid fraying, providing a smooth handling surface, and adding a secondary dielectric layer that prevents external contamination from reaching the fiberglass intermediate layer where tracking or moisture ingress could compromise long-term dielectric performance.
Comparison with Style 3304 — when to specify each: Both Style 3304 and Style 3573 are rated 10,000 Vac and 200°C for electronic ignition applications in gas and fuel oil burner systems. The selection between them depends primarily on the mechanical environment and MRO access frequency of the specific installation. Style 3304 (single silicone layer + fiberglass braid, exposed) is appropriate for OEM factory installations where the ignition lead is routed and secured during equipment assembly and thereafter subjected to minimal mechanical disturbance. Style 3573 (silicone + fiberglass + outer silicone jacket) is the preferred specification for industrial MRO environments where ignition leads are accessed repeatedly during scheduled maintenance, burner head removal, and electrode inspection cycles — the outer silicone jacket prevents braid degradation from repeated handling and maintains the dielectric integrity of the intermediate layer over the equipment service life.
Fiberglass braid vs. serve — specifying the intermediate layer: The intermediate fiberglass layer in Style 3573 may be supplied as either a braid or a serve configuration. Fiberglass braid provides higher coverage density and better mechanical protection against lateral impact. Fiberglass serve (helical wrap) provides adequate coverage with better flexibility — important in ignition lead applications where the wire must be routed around tight radius curves in compact burner compartments. Specify your preference at order time based on the bend radius requirements of your specific ignition lead routing path.
MRO supply considerations for Mexican industrial buyers: In México’s petrochemical and industrial boiler MRO market — concentrated in Tabasco, Campeche, and Puebla’s industrial zones — ignition wire replacement is a routine maintenance item consumed in quantity across large facility maintenance programs. Style 3573’s premium dual-insulation construction justifies stocking in multiple AWG sizes at maintenance warehouse facilities, as the extended service life compared to single-insulation alternatives reduces replacement frequency and total maintenance cost over the equipment lifecycle.
Industrial MRO Applications — Mantenimiento Industrial en México
Style 3573’s dual-insulation construction makes it the preferred specification in the following high-mechanical-stress ignition wire applications across México’s heavy industrial and petrochemical sectors:
- Petrochemical process heater MRO ignition leads — replacement ignition electrode lead wires for process heater burner systems in petroleum refining and petrochemical production facilities across Tabasco and Campeche’s oil and gas processing corridor, where scheduled maintenance programs require periodic ignition lead replacement and the dual-insulation construction withstands the mechanical stress of burner compartment access during hot-standby maintenance procedures.
- Industrial steam boiler ignition system maintenance — ignition wire replacement supply for fuel oil and gas-fired industrial steam boilers serving manufacturing facilities, hospitals, and institutional buildings across Puebla’s industrial zone, where boiler maintenance contractors require UL-recognized 10,000 Vac ignition wire with outer jacket protection for reliable field installation in confined boiler burner compartments with limited access clearance.
- Cement kiln and rotary dryer burner ignition leads — ignition electrode wiring for large industrial burner systems firing cement kilns and rotary dryers in Puebla and Hidalgo’s cement and mineral processing industries, where burner ignition system access during refractory maintenance shutdowns subjects ignition leads to mechanical stress from burner head removal and reinstallation cycles requiring the outer silicone jacket protection of Style 3573.
- Industrial MRO distributor stock supply — Mexican industrial MRO distributors serving the petrochemical, power generation, and heavy manufacturing sectors across Tabasco, Veracruz, and Campeche stock Style 3573 as a premium ignition wire SKU alongside Style 3304, providing maintenance contractors with both single-insulation and dual-insulation options matched to the specific mechanical demands of each installation site’s ignition lead routing environment.
Related UL Styles for Comparison
UL 3573 buyers commonly cross-reference: UL 3304 (200°C / 10,000 Vac silicone rubber with fiberglass braid — single insulation construction for OEM factory-installed ignition leads with lower mechanical disturbance), UL 1911 (250°C / 50,000 Vdc DC-rated high voltage ignition wire for electronic spark ignition systems), UL 3239 (200°C / 60,000 Vdc high voltage DC wire for TV receivers and electronic high-voltage applications), and UL 3071 (200°C / 600V silicone rubber, standard voltage silicone wire for non-ignition high-temperature internal wiring).
Request a Quote — Solicitar Cotización
Submit your AWG, fiberglass layer configuration (braid or serve), color, spool format, and annual volume estimate below. Our bilingual team responds with a formal cotización within 24 business hours. Wire samples available for ignition system qualification testing upon request.
