ABC fire extinguishers are essential for tackling various types of fires, making them a crucial part of any fire protection strategy. These extinguishers utilize monoammonium phosphate, a dry chemical known for its effectiveness. Monoammonium phosphate chemically insulates Class A fires by melting at approximately 350°F, creating a coating on the surfaces it contacts. It effectively smothers and interrupts the chain reaction of Class B fires and is non-conductive, ensuring safety for the operator during Class C fires. Due to its versatility, the ABC fire extinguisher is often the best choice for comprehensive fire suppression needs.