Patent ID: 7239039

Claim:
An electronic switching module that can directly be mounted instead of an electromagnetic DC relay used in various vehicles; the electronic switching module comprising a plastic casing ( 1 ) protecting said electronic switching module against the external environmental conditions, an electronic circuit including a drive circuit ( 7 ); a semiconductor switch in the form of discrete transistor ( 3 ); and a printed circuit card ( 4 ) on which the electronic circuit elements are arranged; an aluminum block ( 2 ) closing the periphery of the electronic circuit and preventing over-heating of the electronic circuit, a cover ( 5 ) wherein said printed circuit card ( 4 ) is placed and contacts ( 6 ) that are mounted to the cover ( 5 ) to provide the connection to the power circuit; wherein the electronic circuit comprises the drive circuit ( 7 ) comprising a triggering DC source ( 8 ); a resistance (R 10 ), a LO ( 14 ), a diode (Q 10 ) and a second resistance (R 11 ) all connected in series to said source and a capacitor (C 10 ) connected in parallel to all these, and a chassis (frame) ( 13 ); a transistor ( 3 ) which is connected to the drive circuit ( 7 ) from its inlet (gate) end ( 9 ); a resistance (R 12 ), the DC source (drain) ( 10 ) end of the transistor ( 3 ) of which is connected to the source ( 11 ) end of the transistor; and a load (L 10 ).