A new class of single-switch low harmonic boost-type rectifiers suitable for both single- and three-phase applications is introduced in this paper. All the semiconductors in these rectifiers operate with zero-voltage switching and clamped voltage (ZVS-CV) with minimum voltage stress, while the d.c.-side diode turns off at zero current. Hence, the switch turn-on loss and noise are sufficiently reduced. A multi-resonant scheme is used to achieve this property. Line current waveforms of low harmonic content are obtained naturally by these rectifiers. Simulation and experimental results for a boost-type rectifier are presented.