The AIRPAX / SENSATA M39019/01-321S 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 military and industrial applications. The circuit breaker features a sealed construction to prevent contamination and ensure reliable operation. It is characterized by its compact size, low power consumption, and fast response time, making it suitable for use in sensitive electronic equipment and systems. The part number includes a dash number that corresponds to specific electrical characteristics such as current rating, time delay, and resistance or impedance, as detailed in Table I of the MIL-PRF-39019/1H specification.