Cofi Ignition transformer TRK2-40PHK

The Cofi TRK2-40PHK is an electronic high-frequency ignition transformer with a grounded pole, designed for burner and boiler systems. It operates on a 220–240 V supply at 50–60 Hz, consuming 65 W (0.3 A). The transformer provides a single high-voltage output of 15 kV with a secondary current of 24 mA (peak 40 mA), suitable for gas, diesel, and fuel oil burners. Its duty cycle is 33% ED within 3 minutes, and it is rated for ambient temperatures up to 60 °C. The unit measures 84 x 70 x 38 mm, weighs 0.300 kg net (0.325 kg gross), and features epoxy filling for protection. It has an IP00 ingress protection rating and is manufactured in Italy to European standards.

When selecting an ignition transformer of this type, verify that the primary voltage (e.g., 230 V AC) matches the burner control, and that the secondary voltage and current are sufficient for the electrode gap. The duty cycle must accommodate the ignition sequence duration. Mounting dimensions and terminal or cable connector patterns must align with the existing wiring and space in the burner chassis. Always check the condition of the high-voltage cable and electrode gap before installation, as a faulty cable can mimic transformer failure.

Typical failures in ignition transformers include internal short circuits or open windings due to overheating or moisture ingress, leading to weak or no spark. The burner may fail to ignite, causing repeated start attempts or lockout. Check for cracked or hardened ignition cables, which can leak voltage to ground, and ensure the electrode gap is correct. If the transformer is suspected, measure primary and secondary voltages with appropriate safety precautions.