A switch circuit comprising: a first switch having a first node and a second node; and a switch control circuit coupled in parallel with the first switch between the first and second nodes, the switch control circuit comprising: a series resonant circuit including a capacitor and an inductor coupled together in series; a third switch coupled in series between the first node and the series resonant circuit; and a first diode coupled between the series resonant circuit and the second node characterised by a cathode of the first diode being coupled to the second node and the switch control circuit further comprising a second switch coupled in parallel with the series resonant circuit; and a controller coupled to each of the first, second and third switches (S1, S2, S3) and configured to provide control signals to turn the first, second and third switches (S1, S2, S3) on and off, the controller being further configured to control the third switch to reverse a polarity of a voltage across the capacitor prior to turn on or turn off of the first switch, and to turn on the second switch, after the polarity of the voltage across the capacitor has been reversed, to discharge the capacitor. a first switch having a first node and a second node; and a switch control circuit coupled in parallel with the first switch between the first and second nodes, the switch control circuit comprising: a series resonant circuit including a capacitor and an inductor coupled together in series; a third switch coupled in series between the first node and the series resonant circuit; and a first diode coupled between the series resonant circuit and the second node characterised by a series resonant circuit including a capacitor and an inductor coupled together in series; a third switch coupled in series between the first node and the series resonant circuit; and a first diode coupled between the series resonant circuit and the second node a cathode of the first diode being coupled to the second node and the switch control circuit further comprising a second switch coupled in parallel with the series resonant circuit; and a controller coupled to each of the first, second and third switches (S1, S2, S3) and configured to provide control signals to turn the first, second and third switches (S1, S2, S3) on and off, the controller being further configured to control the third switch to reverse a polarity of a voltage across the capacitor prior to turn on or turn off of the first switch, and to turn on the second switch, after the polarity of the voltage across the capacitor has been reversed, to discharge the capacitor. a second switch coupled in parallel with the series resonant circuit; and a controller coupled to each of the first, second and third switches (S1, S2, S3) and configured to provide control signals to turn the first, second and third switches (S1, S2, S3) on and off, the controller being further configured to control the third switch to reverse a polarity of a voltage across the capacitor prior to turn on or turn off of the first switch, and to turn on the second switch, after the polarity of the voltage across the capacitor has been reversed, to discharge the capacitor.