Beckett 51838GU Ignition Transformer

Beckett 51838GU Ignition Transformer is a replacement oil-burner ignition transformer that converts a standard 120V AC supply (60 Hz) into a high-voltage pulse for Beckett burners, delivering up to 20,000 volts peak on the secondary and operating in the 15–30 kHz range for reliable sparking. The compact, base-mount device measures 4 inches wide by 4¼ inches deep and mounts without a mounting plate, offering a straightforward retrofit option for aging ignition assemblies. Weighing about 0.55 kg, it provides a sturdy, lightweight solution that fits standard Beckett ignition configurations with multiple taps to accommodate variations in electrical connections. The 51838GU is widely recognized as Beckett’s ignition transformer replacement part for oil-fired burners and is stocked by retailers and distributors under the Beckett brand, ensuring compatibility with Beckett ignition systems and replacement part catalogs. This transformer generates the high-voltage impulse required to ignite the oil-air mixture when the burner starts, aligning with Beckett’s typical 120V control and ignition architectures found in residential and light commercial installations.