Check out electrical knife switch 3D model on CGTrader for $12. High-quality mesh by Hafcoy.
STL (Stereolithography, filesize: 8.77 MB), OBJ (OBJ, filesize: 8.77 MB), 3DS (3D Studio, filesize: 4.39 MB), DAE (Collada, filesize: 4.39 MB), FBX (Autodesk FBX, filesize: 8.77 MB), SKP (Sketchup, filesize: 4.39 MB), BIP (KeyShot, filesize: 4.39 MB)