De Dietrich 200005780 electrodes + cable L360mm

This article is an ignition and/or ionization electrode assembly with a cable, 360 mm long, from De Dietrich. In a gas burner, one electrode typically delivers the spark for ignition while another—or the same electrode in some designs—proves the flame by conducting a small rectified current through it. The assembly combines both functions in a single component with a pre-attached cable for direct connection to the ignition transformer or burner control. The length of 360 mm indicates the overall dimension from the mounting flange to the tip, which determines how far the electrode reaches into the combustion zone. When selecting a replacement electrode of this type, the critical parameters are the overall length, the diameter and material of the insulator, the shape and gap of the electrode tip, and the mounting flange pattern. The bend of the electrode rod must match the original to position the tip correctly relative to the burner head or pilot burner. Even a small deviation in gap or angle can prevent reliable ignition or flame detection. For burners that rely on an ionization signal for flame proving, the electrode must be compatible with the control box’s sensing circuit. Typical failure modes for electrodes in this position include erosion of the tip from repeated sparking, cracking of the ceramic insulator due to thermal shock or mechanical stress, sooting that insulates the electrode and weakens the flame signal, and a gradual widening of the spark gap that lengthens ignition time. When replacing, inspect the mating cable and connector for damage, and ensure the electrode is seated firmly in its gasket or O-ring to avoid leakage. The burner control should be reset after replacement to clear any lockout history.