The ST-40 from Space Electric Thruster System (SETS) is a Hall-Effect Thruster that is designed for LEO and GEO satellites. It has a thrust of 8-25 mN and an estimated life-hours of 4500 hrs. It has a mass of 1.2 kg and a specific impulse of up to 1900 s. This compact hall-effect thruster has a discharge power of 150-450 W, a discharge voltage of 200-300 V, and a thrust efficiency of up to 50%. It has a multi-propellant capability and heater-less hollow cathodes. This cost-effective spacecraft thruster works on inert gases such as Xenon (Xe) and Krypton (Kr). It measures 148.5 x 96.5 x 81.5 mm and is ideal for constellations of small satellites.