De Dietrich JJD008422570 ignition electrode

This is an ignition electrode from De Dietrich, referenced as JJD008422570 and 336.946.049. It belongs to the category of ignition and ionisation electrodes. Ignition electrodes of this type deliver the spark that lights the fuel-air mixture in a burner. They are positioned directly in the flame zone and are considered consumable parts, as they degrade with each firing cycle. In a standard burner sequence, the ignition transformer produces a high-voltage spark at the electrode tip when the burner control calls for heat. The electrode must maintain a precise gap to ensure reliable arcing. After ignition, the spark stops, and the flame is usually proved by a separate ionisation electrode or a UV sensor. Some systems combine ignition and flame sensing in one electrode, but this part is specifically an ignition electrode. When selecting a replacement for an ignition electrode, key parameters include the electrode length and bend, insulator diameter, the spark gap, and the mounting flange design. These dimensions are shaped to fit a specific burner series. Common failure modes that prompt replacement are erosion of the metal tip, cracking of the ceramic insulator, soot buildup that shorts the spark, and gradual gap widening that delays or prevents ignition. Before installing a new electrode, inspect the ceramic for cracks and verify the gap against the burner manufacturer’s specification.