Heaters

Blow-by, diesel fuel, and diesel exhaust fluid (DEF) heaters from Littelfuse have long ensured vehicles and generators Blow-by, diesel fuel, and diesel exhaust fluid (DEF) heaters from Littelfuse have long ensured vehicles and generators operate in low-temperature environments. Our DEF heater also boosts selective catalytic reduction (SRC) processes. Plus, Littelfuse’s polymeric positive temperature coefficient (PTC) resettable devices heat fluids and gases to improve car battery and digital camera performance.