White-Rodgers 768A-843 Ignitor

Upgrade your thermal system reliability with the White-Rodgers 768A-843 Silicon Nitride 80V Hot Surface Ignitor. This OEM replacement nitride ignitor is engineered specifically for residential furnaces utilizing 80-volt ignition systems and serves as the direct replacement for 768A-143 and Thermo Products components. Unlike fragile silicon carbide alternatives, this nitride hot surface ignitor features superior mechanical strength and thermal endurance, utilizing a steatite insulator and a 55mm element length to ensure consistent combustion cycles in demanding environments. The unit includes high-temperature white Teflon coated leads and is pre-terminated with a 2-terminal AMP receptacle featuring a .084" female socket for a secure, drop-in electrical connection. A zinc-plated steel mounting tab is included to maintain precise alignment within the burner assembly, preventing vibration-related fatigue and ensuring peak furnace performance.

• Direct Cross-Reference: Purpose-built to replace 768A-143 and compatible Thermo Products ignitors without field modification.
• High-Durability Construction: Silicon nitride material provides increased resistance to oxidation and physical damage compared to standard carbide igniters.
• Simplified Professional Installation: Equipped with a factory-correct .084" female socket AMP connector and 15.5-inch lead wires for rapid service.
• Optimized Ignition Geometry: Features a 54mm-55mm element size and steel mounting bracket for precise placement in the gas stream.

Is the White-Rodgers 768A-843 compatible with 120V ignition systems?
No, this is an 80-volt rated component. Integrating this ignitor into a 120V system will result in immediate part failure. Always verify the output voltage of your integrated furnace control before installation.

Can I use this to replace a silicon carbide ignitor?
This part is designated for silicon nitride-only replacement. It is designed to work with adaptive ignition routines found in specific White-Rodgers and Thermo Products boards that manage 80V power delivery.

What should I do if the connector doesn't match my existing harness?
The 768A-843 utilizes a .084" female socket. If your system requires a .093" socket, you likely need a different specific model, such as the 768A-842. Do not force or modify the terminal pins.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.