The 3224W-1-101E is a 12-turn top-adjustment trimmer potentiometer manufactured by Bourns and rated for 100 Ohms 0.25W, 1/4W J Lead Surface Mount. It is made out of cermet and features and top adjustment knob for regulating the resistance. This device is typically used to fine tune a circuit's parameters or for variable current and voltage control. It is commonly used in electronic applications such as audio mixing, mixing effects, automatic level control, and voltage regulation.