Are cartridge heaters AC or DC?

Cartridge heaters can work with both AC and DC power sources. It all depends on the specific application and requirements of the system. Both AC and DC power sources have their advantages and disadvantages, and ultimately it's up to the engineer or technician to choose which one is best suited for their needs. Regardless of the power source, cartridge heaters are reliable, efficient, and cost-effective heating solutions that deliver consistent and accurate temperature control. With their versatility and dependability, cartridge heaters are a popular choice across a wide range of industries and applications.