UL 3573 High Temperature Ignition Lead Wire

Q: What are the primary applications for UL 3573 wire?

According to the official standard, UL 3573 is specifically designed for electronic ignition or similar applications in gas ranges, gas burner systems, and fuel oil burner systems where it is protected from damage.

Q: What is the voltage and temperature rating of UL 3573?

This wire is rated for extremely high voltage applications, operating safely at up to 10,000 Vac (10KV) with a maximum continuous temperature rating of 200°C. It also passes the horizontal flame test.

Q: What materials are used in the construction of UL 3573?

It features a robust dual-layer protection. The inner insulation is made of high-temperature Silicone Rubber (SR) with a minimum average thickness of 30 mils. The outer layer consists of a durable fiberglass braid (or serve) with an additional insulation layer of at least 10 mils over the braid.

UL 3573 High Temperature Ignition Lead Wire — 200°C / 10,000 Vac, Silicone Rubber + Fiberglass Braid

UL AWM Style 3573 is a high-temperature ignition lead wire under UL Subject 758, Section 3. It is rated 10,000 Vac and 200°C, with a dual-layer construction: extruded silicone rubber inner insulation, a fiberglass braid or serve intermediate layer, and an additional silicone rubber outer insulation over the braid. The permitted use covers electronic ignition or similar applications in gas ranges and gas or fuel oil burner systems, where the wire is protected from damage during handling, installation, and servicing of the appliance.

Technical Specifications — UL Style 3573

Parameter	Specification
UL AWM Style	3573
UL Subject	758, Section 3
Temperature Rating	200°C
Voltage Rating	10,000 Vac
AWG Range	22 AWG – 12 AWG, solid or stranded round
Inner Insulation	Extruded SR-Silicone — 30 mils min average / 27 mils min at any point
Intermediate Covering	Fiberglass braid or serve
Outer Insulation	Extruded SR-Silicone — 10 mils min at any point over braid
Flame Rating	Horizontal flame
UL Recognition	UL Recognized Component — file on record
Permitted Use	Electronic ignition or similar application in gas ranges or gas or fuel oil burner systems — protected from damage during handling, installation, and servicing

Frequently Asked Questions

What are the primary applications for UL 3573 wire?

UL AWM Style 3573 is intended for electronic ignition or similar applications in gas ranges, gas burner systems, and gas or fuel oil burner systems, where the wire is protected from damage during handling, installation, and servicing of the appliance. It is not intended for open routing, field wiring, or direct flame-zone exposure.

What is the voltage and temperature rating of UL 3573?

UL 3573 is rated 10,000 Vac and 200°C continuous, with horizontal flame rating. Confirm that your ignition system outputs AC high voltage before specifying this style — for DC high-voltage pulse applications, see UL 1911.

What materials are used in the construction of UL 3573?

The construction consists of three layers: an extruded silicone rubber inner insulation (30 mils min average / 27 mils min at any point), a fiberglass braid or serve intermediate covering, and an additional extruded silicone rubber outer insulation (10 mils min at any point over the braid). This three-layer construction differentiates UL 3573 from UL 3304, which uses a single silicone rubber layer under a fiberglass braid without an outer jacket.

How does UL 3573 differ from UL 3304?

Both styles are rated 10,000 Vac and 200°C with fiberglass braid coverings. UL 3573 adds an outer silicone rubber jacket over the braid, which provides additional mechanical and environmental protection at the outer surface. UL 3304 uses a thicker single silicone rubber insulation wall (40 mils min avg) without an outer jacket. Selection between the two depends on your equipment design requirement and whether an outer jacket is specified.

Request a Quote

To receive an accurate quotation, please include the following in your enquiry: ignition system type (AC or DC), required voltage rating, AWG size, conductor type (solid / stranded / plated), insulation colour, outer covering requirement, routing condition (protected internal / conduit), quantity (metres or reels), equipment type, and end application. Minimum order: 100 m per specification. Response within 12 hours.