The AIRPAX / SENSATA M39019/01-250 is a low-power, magnetic, trip-free, one-pole circuit breaker conforming to MIL-PRF-39019. It is designed to provide overcurrent protection in a variety of electronic systems and equipment. The circuit breaker features a sealed construction to ensure reliable operation in harsh environments. It is commonly used in military and aerospace applications where compact size and robust performance are critical. The device incorporates a trip-free mechanism, ensuring rapid interruption of the circuit in the event of an overload or short circuit. Dimensions vary based on dash number, with metric equivalents provided for general information. Mounting hardware includes a hex nut and lockwasher.