Case for passive optical components

A case for passive optical components such as glass fibers, couplers and splices permits a reception for couplers and splices while maintaining the common mounting dimensions, and which guarantees a clear, service-friendly and safe guiding of the glass fibers while maintaining the minimum bending radii. At one front side 4 of the lower case portion 2 there are provided strain-relieved individual guide portions 5, 6 for the glass fibers and an S-shaped or diagonal groove 20 integrated in the bottom 10. The receiving portions 12, 13 for couplers 45 and for splices 46 are formed by guide portions 24, 33 connected with the bottom 10. Between the side walls 27, 35 and the receiving portions 12, 13 there are provided fiber guide channels 26, 36 for achieving the required reserve lengths. In the area of the receiving portions 12, 13, transversely to the parallel guiding portion 24 of the couplers 45 and of the splices 46 are included through-passing lift-off openings 30, 38 in the bottom 10.