Abstract: An input-side protective circuit for protecting an intermediate circuit of an inverter against overvoltages, wherein the input-side protective circuit includes an upstream element for limiting the voltage of the intermediate circuit connected upstream of the intermediate circuit and which is bridgeable by a mechanical switching device that is controllable such that it opens in a feed-in operation of the inverter when an intermediate circuit voltage is greater than a specified voltage limit. The protective circuit also includes an electronic voltage limiter connected downstream of the upstream element and connected in parallel to the intermediate circuit.

Abstract: A power strip for electrical switch devices which includes a plurality of plug connection parts disposed in a base body in a sealed-off manner, and is joined with the aid of contacts to conductor tracks of a first printed wiring board. The conductor tracks of a second printed wiring board are linked with further plug connection parts. To enable opening at will, the plug connection parts are disposed in an insert part that can be introduced into a recess of the base plate. The insert part is fixed in the base body with the aid of a comb-like part. The embodiment of the tines of the comb-like locking part enables simple assembly and disassembly.

Abstract: The holder (1) for an electronic component (20), especially a hybrid module, is preferably a unitary plastic element having an elongated base plate (2) formed with openings (14) therein to permit insertion of terminal pins or lugs (21) projecting from the component therethrough. Two holder arms (30) project from the base plate, the holder arms having module support portions (3) and oppositely projecting posts (4). The posts fit into receiving openings (26, 27) of a printed circuit board, which receiving openings having a spacing (S) which is greater than the distance (D) between the posts so that, upon insertion of the posts in the openings the arms (30) will tilt towards each other, thus clamping a module, typically in card or board form, between the module support (3) of the arms.

Abstract: A pressure valve for heating a pressure medium and maintaining its temperature constant, has a control slider provided with a throttle, a pilot valve influencing a position of the control slider and having a spring-loaded valve member and a valve seat, a thermosensor arranged to sense the pressure medium and to determine throttling of the latter, wherein the thermosensor controls an electromagnet acting upon the pilot valve, and the spring of the pilot valve in the opened position of the valve member is at least partially pretensioned, and upon actuation of the electromagnet and assuming by the valve member the closed position the spring is tensioned to a value corresponding an opening pressure.