has rocker-style "reset" button thermal circuit breakers have trip characteristics similar to "slow blow" fuses rated at 15 Amps for 125VAC or 250VAC circuits snap-mount into 5/8 inch = 16 mm round or "D-shape" or "Double D" shape hole similar appearance to panel-mount fuse-holders has 1/4 inch male push-fit quick connect blade terminals compare Sears Parts Direct 109382 price $13.61 for treadmill Sports & Fitness Equipment replacement part fits Nordic Track and Pro-Form treadmills replaces Potter and Brumfield W28-XQ1A series thermal circuit breakers replaces similar Carling, Hosiden, Rong Feng, Tyco TE Conductivity, Yeu Sheng thermal circuit breakers call CBK Supply (269 345-4705 Mon-Fri 10AM-3PM Eastern) for assistance with thousands of electronic parts