Cofi Ignition transformer TRH2-30C

The Cofi TRH2-30C is an ignition transformer designed for use in gas and diesel burners, boilers, and industrial thermal equipment. It operates from a 230 V, 60 Hz supply and functions as a step-up transformer to generate a high-voltage spark for ignition. The transformer is compact, measuring 120x85x40 mm, and features a silicone-insulated ignition cable. It is intended for operation during the ignition phase only, as controlled by the burner's control system. This model is manufactured in Italy.

When selecting a replacement ignition transformer, match the primary voltage (e.g., 230 V) and the mechanical footprint, including mounting hole positions and dimensions. The secondary electrical ratings (voltage and current) must correspond to the original to ensure proper sparking. The high-voltage cable connector type must also be compatible. Inspect the existing cable for damage and replace if insulation is hardened or cracked.

Common failure modes include internal short circuits or open windings, leading to weak or no spark. The burner may fail to ignite or lock out after repeated attempts. Check the high-voltage cable for cracks or hardening, as this can cause spark leakage to ground, mimicking a transformer fault. Verify primary voltage supply and continuity of the transformer windings.