The 1423673-8 is a rocker-actuated thermal circuit breaker and power switch from TE Connectivity's Potter & Brumfield W51 series, designed to provide circuit protection and power switching in a single compact unit. It features a trip-free design with 5 to 20 amp ratings, maximum operating voltages of 50VDC or 125/250VAC (50/60 Hz model dependent), and an interrupt capacity of 1,000 amps in accordance with UL standard 1077. The device includes a resettable overload capacity of ten times rated current, switch endurance cycling of typically 6,000 operations at 100% of rating, and a reset time of 60 seconds, with dielectric strength of 1,500VAC (60 seconds). It operates over a temperature range of 0°C to +60°C (for 10-20A models) or 0°C to +50°C (for 5-8A models), and snaps into a standard 1.122 x 0.531 inch (28.5 x 13.5 mm) panel cutout accommodating panel thicknesses from 0.030 to 0.118 inches. This breaker is ideal for applications requiring compact, trip-free circuit protection with optional illumination, offering UL 1077 recognition and VDE 0642/EN60934 approval for reliable performance in industrial and commercial equipment.