The Allanson 2721 456 Ignition Transformer is an OEM ferromagnetic ignition transformer engineered to provide consistent high-voltage spark energy for Aero burner and HVAC combustion applications. It accepts a 120 VAC primary and steps up to 10,000 VAC secondary, delivering reliable ignition performance with a ~250 VA rating suitable for many residential, commercial, and light industrial systems. Built with high-temperature internal wiring and a midpoint grounded ferromagnetic core, this transformer runs cooler and quieter while meeting EMI/RFI noise suppression standards for safer operation. Designed to meet burner manufacturer specifications, the 2721-456 offers a dependable OEM replacement for parts like Webster 313-24ABAER and France 5LAY-56.
Key Features
- 120 VAC primary input — standard line voltage ignition input for HVAC systems
- 10,000 VAC secondary output for strong, consistent ignition spark energy
- ~250 VA rated output with ~23 mA current capacity for demanding burner circuits
- Double-pole ferromagnetic design for constant duty, continuous operation
- Midpoint grounded core enhances safety and voltage stability
- High-temperature insulated windings for long service life under heat cycling
- Meets American & European EMI/RFI noise emission standards for cleaner ignition performance
![C.E. Smith Angled Post Guide On - 40" - Black [27647]](https://www.greathardwarecenter.com/wp-content/uploads/2026/09/c-e-smith-angled-post-guide-on-40-black-27647.webp)