Fida Ignition transformer ENTBD3

The Fida Ignition transformer ENTBD3 is a step-up transformer used in oil and gas burners. It operates on a supply voltage of 230 V and produces a secondary voltage of 0.026 kV. The transformer is energized only during the ignition period and has a duty cycle of 50%. It features a compact plastic housing with IP44 ingress protection, and connections are made via plug-in connectors, including a rectangular plug connector for power and a plug-in ø4 mm connector for the ignition cable. The transformer is designed for use with Fida 26/35 burners.

When selecting an ignition transformer of this type, ensure the primary voltage, secondary voltage, and duty cycle match the burner's requirements. The physical mounting type and terminal arrangement must be compatible with the existing setup. Check the pattern of the high-voltage cable connector, as a mismatch may require replacing the cable. Also, verify that the secondary output suits the electrode gap and that the duty cycle rating is appropriate for the ignition sequence.

Common failures in ignition transformers include insulation breakdown, which can cause spark leakage to earth, often due to a hardened or cracked ignition cable. This may appear as a faulty transformer even if the transformer itself is sound. Other issues include open circuits in the windings or short circuits, leading to no spark or weak spark. Before replacing the transformer, inspect the ignition cable and electrode condition.