Ignition Transformer

The ignition transformer is a double-wound step-up transformer w/o any tapping, using copper windings around an iron core.
It steps up the incoming voltage of normally low voltage (say, 120 volts) to an output higher voltage (say, 5,000 volts), the output voltage rating being dependent on application. The secondary load current is in the order of milliamperes. However, applications are normally two types: "Interrupted Ignition" or "Intermittent Ignition". So, the transformer does not have capability for continuous duty, and is short-time rated, as required by the application. Accordingly, purchaser's control circuit at the primary should be designed to implement those duties.
Enquiry-specification should take care of the above-mention aspects.
Normally, Ignition transformers are used to ignite a mixture of gas and air by delivering a high-energy spark to the end of an ignition electrode rod. Ignition transformers are considered “direct spark” ignition. Before the popularization of direct spark technology, most burners were piloted. Unless they are very big, burners today are primarily direct spark.