Capacitor for Hanovia medium-pressure ultraviolet disinfection systems, 2.4 kV, 2 µF, ±5% tolerance, part 660077-0206. It sits in the lamp control gear, setting the circuit conditions the medium-pressure lamp needs to strike and run stably; a capacitor that has drifted low presents as a lamp that will not strike or that runs under output. The part-number family encodes the value — 660077-0106 is 1 µF, -0206 is 2 µF, -0406 is 4 µF — so the rating printed on the can should be matched to the suffix before ordering. Reference number 22122-0216.