De Dietrich S62750 ignition transformer

The De Dietrich S62750 ignition transformer is an ignition transformer, catalogue article 336.823.007, manufacturer code S62750 and 336.823.007. Parts of this type step mains voltage up to the level required to produce a spark at the ignition electrode gap. The transformer operates only during the ignition phase, under command from the burner control. Its function is to create a high-voltage spark that ignites the fuel-air mixture before the flame sensor confirms a stable flame. When selecting a replacement ignition transformer, key parameters include secondary voltage and current, primary voltage, duty cycle, mounting and terminal type, and the cable connector pattern. Primary voltage is typically 230 V, but 110 V and 24 V versions exist. The ignition cables are silicone-insulated to withstand high voltage and heat; a hardened or cracked cable can leak the spark to earth, which may be mistaken for a faulty transformer. Other issues such as moisture ingress, internal breakdown, or debris on the high-voltage output terminals can also cause ignition failure. Always verify that the replacement matches the original in electrical ratings and physical mounting to ensure correct integration with the burner control and electrode assembly.