Abstract: Electrical apparatus comprises: a housing; an electrical circuit in the housing comprising a circuit component; a metallic component in the housing, for dissipating heat generated in the circuit component; and a thermally conductive body arranged between a surface of the circuit component and a surface of the metallic component. The housing comprises a first housing portion and a second housing portion, the second housing portion being adapted to locate on the first housing portion in a closed position in which the electrical circuit, metallic component, and body are enclosed within the housing, the second housing portion being adapted such that, when in the closed position, the second housing portion urges the surface of the circuit component towards the surface of the metallic component such that the body is in contact with both of these surfaces to assist transfer of heat generated in the circuit component to the metallic component.

Abstract: A method and apparatus are disclosed for providing current to a load. The apparatus includes a full or half bridge switching circuit, including at least one switching element for supplying power to a load when switched on and means for switching a state of the switching element only at a time when a substantially zero voltage is applied across the switching element.

Abstract: A method and apparatus are disclosed for providing current to a load. The apparatus includes a full or half bridge switching circuit, including at least one switching element for supplying power to a load when switched on and means for switching a state of the switching element only at a time when a substantially zero voltage is applied across the switching element.