The AM1R-D3-AC07D-A-20-2 is a single-pole, front-mount hydraulic-magnetic circuit breaker designed for overcurrent protection in DC circuits. It features a series trip internal circuit and a short time delay curve (Curve 3) that accommodates an 8x inrush current to prevent nuisance tripping. This breaker operates reliably across a wide temperature range from -40°C to +85°C, with a trip rating that is not influenced by ambient temperature. Its robust design, resistance to shock and vibration, and stable performance make it suitable for demanding applications in industrial, telecom, military, and marine environments.