The Schneider Electric NSX100R is a four-pole circuit breaker designed for residential buildings and light commercial electrical installations, rated for 40 A with a breaking capacity of 200 kA for AC applications. This compact protective device carries the label 5.2E, confirming compliance with relevant electrical safety and performance standards. Made from durable materials, it provides reliable overcurrent and short-circuit protection in distribution boards. The device measures approximately 90 mm in height, 70 mm in width, and 70 mm in depth, with a weight of about 450 g. Its modular design allows for easy installation in standardized DIN rail mounting systems commonly used in electrical distributions. The NSX100R utilizes thermal-magnetic tripping technology for consistent performance under varying temperature conditions, with an operating range of -25 °C to +70 °C. The visible on/off lever provides a clear status indication, while the trip-safe mechanism ensures protection even if the lever is held in the on position during a fault. This circuit breaker is suitable for protecting circuits in residential buildings, workshops, and small commercial spaces where reliable electrical safety is required. It is a successor model in Schneider Electric's NSX series, maintaining the brand's focus on quality and reliability in protection solutions.