The 3405-001033 is a genuine Samsung Micro-Switch. The Samsung 3405-001033 is one of the door latch switches. The switch monitors whether the door is open or closed. Quality tested for excellent performance as per the Samsung's standards It is recommended to either refer to your appliance service manual, contact your appliance manufacturer, or contact a service professional to validate the needed part number for your appliance prior to purchasing. The Samsung 3405-001033 Micro-Switch fits the following brands of microwaves: Samsung The 3405-001033 is a new part that doesn't replace any other part.