The AP17-1-52-502 is a two-pole, fully sealed magnetic circuit protector designed for DC applications. It combines power switching and reliable overcurrent protection with a nominal rating of 5.0 amperes and a long time delay characteristic. This protector features a trip-free mechanism, ensuring the circuit opens during an overload even if the handle is held on. It is engineered to operate in harsh conditions, with a wide ambient temperature range of -40°C to +100°C and resistance to high levels of shock and vibration. Common applications include communication equipment, aircraft instrumentation, radar, and power supplies where precise and stable circuit protection is critical.