What is the operating voltage of a spark igniter?

The operating voltage of a spark igniter is typically around 6,000 VAC (Volts Alternating Current). This voltage level is sufficient to create a spark that ignites the gas in a furnace. The igniter generates a high-voltage electrical discharge that jumps across a small gap, forming a spark capable of igniting the combustible gas-air mixture in the burner assembly.

This specific voltage is optimal balancing the need for effective ignition without risking damage to the igniter itself or surrounding components due to excessive voltage. Higher voltages than 6,000 VAC may not significantly increase ignition effectiveness but could increase wear and reduce the lifecycle of the igniter. Therefore, while options suggesting higher voltages exist, 6,000 VAC is the standard operating voltage found in most applications for safety and efficiency.