Plug-in electronic overvoltage protection module with base-plate

摘要

The module has a circuit board (3) enclosed by a cooperating housing (1) which has a number of deformable projections (2) extending in the direction of the circuit board, to fit through openings (4,5,6) provided in the surface of the latter. Each of the openings in the circuit board is widened out on the rear side for receiving the enlarged head of the inserted projection, preventing the subsequent removal of the projection, so that the latter does not project beyond the rear surface of the circuit board.