Hall thrusters typically operate around 50mN/kW. Gridded ion thrusters a bit lower, like 30-40mN/kW. That being said, some exotic thrusters like the FEEP still

Hall thrusters typically operate around 50mN/kW. Gridded ion thrusters a bit lower, like 30-40mN/kW. That being said, some exotic thrusters like the FEEP still manage to be useful operating below 10mN/kW for precise positioning. [Edited erroneous data for FEEPs and needless rant]