There is disclosed a scroll compressor capable of improving the oil separating device of a refrigerant gas discharged from a scroll compression element to effectively suppress the amount of oil to be discharged through a discharge tube. A pair of balanced output terminals of SAW filters of unbalanced input-balanced output are connected respectively to the pair of electrode patterns via the surface layer electrode pattern, and a part of the first ground electrode pattern is disposed between the pair of the electrode patterns. This coupling includes coupling structure on the athermalization part which engages coupling structure on the housing or lens support, and these coupling structures are resiliently urged into engagement with each other in a manner that facilitates a zero backlash condition. The module is rugged and suitable for operating in a wide range of physical environments including lake or sea immersion to substantial water depths, desert, arctic and others. The catch assembly includes a catch housing with an inner and outer cam rotatably disposed therewithin and having mating ends that collectively define a cam interior.