The unique cell frame of the present invention comprises an integral protector portion. The devices can be used in vascular channels, urinary tracts, biliary ducts and the like, and filter emboli and other debris generated at a treatment site. The character has a body and depicts the interchangeable and disposable characters, and as such, is interchangeable and disposable. The hydroprocessing catalyst is particularly effective in the conversion of the heavy hydrocarbon feedstock. This device can further include a soft closed-cell foam top mounted on the top plate wherein the tube is inserted and maintained by the foam in such a way as to allow for slight motion of the tube induced by the contact by the spring armature. Whereby a drive circuit for the insulated gate device can be reduced loss at the time of turn-on and reduced temperature dependency of noise.