Westronics
Westronics Inc 13267 , 275 to 3250 C 100om Pt
You will find that Whirlpool microwaves have consistent power output levels.
Westronics ZB10027001 Model DDS7800 Power Supply F/Temp /Monitor System
At 1 inch x 2 inches x 1 inch, this piece is small enough to ignore when not used.