Fida Ignition transformer TC101D

The Fida Ignition transformer TC101D is a compact, enclosed-housing device designed to increase the input voltage from 230 V to a secondary voltage of 5–5 kV. It operates during the ignition phase to create the spark necessary for burner ignition, with a duty cycle of 100%. The transformer features a triangular plug connector for electrical connection and silicone-insulated cables, with an ingress protection rating of IP44. It is intended for use in boiler automation systems.

When selecting a replacement ignition transformer of this type, ensure the primary voltage matches the supply (e.g., 230 V), the secondary voltage is adequate for the electrode gap and fuel type, and the duty cycle meets the application requirements. The mechanical fit—mounting holes, terminal orientation, and connector pattern—must correspond to the original part. Parts of this class are chosen by secondary voltage and current, primary voltage, duty cycle, mounting and terminal type, and cable connector pattern.

Ignition transformers of this kind can fail due to hardened or cracked ignition cables, which may leak the spark to earth and imitate a faulty transformer. Symptoms include weak or absent spark, leading to ignition failure or intermittent operation. Before condemning the transformer, check the condition of the ignition cables and connections.