De Dietrich s100604 ignition electrode

An ignition electrode delivers the spark that ignites the fuel‑air mixture inside the burner. During the start‑up sequence the burner control energises the ignition transformer, which sends a high‑voltage pulse to the electrode. The spark jumps across the electrode gap to a grounded surface (typically the burner head or a separate earth pin). The electrode sits directly in the flame zone, so it is exposed to high temperature, combustion deposits, and mechanical vibration. It is a consumable part that wears over time and must be replaced when performance degrades. Parts of this type are selected by their physical shape and electrical characteristics. The critical dimensions are the electrode length, the bend angle, the diameter and length of the ceramic insulator, the spark gap setting, and the type of mounting flange or bracket. Manufacturers shape electrodes for specific burner series, so the geometry must match the burner head and the ignition transformer output. Common failure modes are erosion of the metal tip, cracks in the ceramic insulator caused by thermal shock, sooting that shorts the spark, and a drifting gap that requires a higher voltage to jump. A drifting gap prolongs the ignition phase and may cause lockouts. This article is an ignition electrode from the De Dietrich range, coded as manufacturer part S100604 and catalogue article 336.946.022. It is listed in the category of ionization and ignition electrodes. When replacing an electrode of this type, compare the original part’s bend, insulator length, and mounting arrangement to ensure the spark lands in the correct position relative to the burner head. Clean the electrode seating area and check the ignition transformer and high‑tension cable for damage at the same time.