Engineered with a 10:1 thrust ratio

providing greater flexibility for field modifications

the Intermatic K4221C incorporates a built-in 30-to-90-second time delay feature

making it an ideal choice for powering sensitive sensors

System Protection: Prevents oil-related buildup in pumps and evaporative systems

Robertshaw 41-403 Hot Surface Ignitor Engineered with a 10:1 thrustThe Robertshaw 41 403 Hot Surface Ignitor (271M) is a heavy duty silicon carbide igniter designed for consistent ignition in 120V AC heating systems. As a veteran grade furnace replacement part, this unit features high purity recrystallized silicon carbide construction (Crystar), providing the structural integrity needed for demanding cycles in boilers, rooftop units, and infrared burners. It serves as the direct Robertshaw 41 403 cross reference for