Cofi Ignition transformer TRL12-30C

The Cofi Ignition transformer TRL12-30C is a high-voltage ignition transformer designed to generate a spark in automatic ignition systems of gas, diesel, and dual-fuel burners. It operates from a 12 V supply voltage and provides a secondary voltage of 15 kV across 2 poles. The transformer measures 90 mm in length, 81 mm in width, and 40 mm in height, with a net weight of 0.495 kg and a gross weight of 0.52 kg. It features silicone-insulated ignition cable for high-voltage and heat resistance.

When selecting a replacement ignition transformer of this type, ensure the supply voltage matches the burner control (e.g., 12 V DC), and the secondary voltage and current are compatible with the ignition electrode gap. Physical dimensions, mounting arrangement, terminal type, and the connector pattern for the ignition cable must be compared with the original part. The ignition cable must be silicone-insulated to withstand high voltage and heat; inspect the cable and electrode assembly before ordering.

Typical failures of ignition transformers include internal short circuits, open windings, or insulation breakdown, leading to weak or no spark at the electrodes. Equipment may fail to ignite, lockout after repeated attempts, or show intermittent ignition. Check for cracked or hardened ignition cable that can leak spark to earth, mimicking a faulty transformer, and verify the transformer's output with a high-voltage probe.