The AM3R-A8-LC07D-A-40-5 is a hydraulic magnetic circuit breaker manufactured by HEINEMANN CANADA CORPORATION. It is a 3-pole circuit breaker and has a current rating of 40A at 240VAC. This circuit breaker uses hydraulic magnetic technology, which provides reliable and consistent protection from overloads and short circuits. It is suitable for use in a wide range of applications and offers high performance and durability.