The value of the contract from the Brazilian company for Meggitt's ATA Chapter 26 Fire Protection System is more than $9 million.
Meggitt said its system provides fire detection and suppression for the aircraft's auxiliary power unit, engine pylon and power plant and smoke detection and suppression for the cargo compartment.
The KC-390 is a twin-engine, medium-lift military transport aircraft. It will have a cargo capacity of as much as 23 tons and can be rapidly configured as a fuel tanker.
Embraer said the aircraft will enter service with the Brazilian air force in 2016.
"This award reflects our commitment to providing our customers with the most technologically advanced and cost-effective fire protection systems in the marketplace and continues our long history providing fire protection systems for Embraer's fleet of military, commercial and business jets," said Meggitt Safety Systems President Dennis Hutton.