AP Series Hydraulic Magnetic Circuit Breakers

Sensata Airpax AP series are fully sealed, hydraulic magnetic circuit protectors that combine power switching and accurate, reliable circuit protection with inverse time delays and trip-free features. Unlike a thermal circuit protector, the AP does not change its trip current over a wide temperature span.

The AP series is available in either DC, 50/60 Hz, or 400 Hz versions and with various delays to match the protector to specific application requirements. Waterproof panel integrity is provided by an O-ring bushing seal and a silicon rubber gland within the bushing/handle assembly. The devices are also certified against salt spray testing per MIL-STD-202, Method 101, Test Condition B, with no evidence of corrosion, electrical or mechanical damage.

The UP circuit protector, with UL recognition and CSA certification, is essentially the same as the AP in construction and operating principle. It is approved for operation at 50 V_DC to 20 A, 120 V 50 Hz/60 Hz to 15 A, and 240 V 50 Hz/60 Hz to 7.5 A. Due to UL and CSA creepage specifications and the wide glass terminals utilized, the UP circuit protector is available in single-pole units only. The UP series offers an optional FM approval (Factory Mutual Research), provided for petrochemical applications. FM approval is available for single-pole, series trip, UP-type units only.

AP-MIL protectors are produced in accordance with MIL-PRF-39019 and the pertinent specification sheets. They are subjected to an exacting production and test program to maintain their Qualified Products Listing (QPL). One,- two-, and three-pole series trip units, with or without auxiliary contacts, have been accepted for this listing. Refer to specification sheets MIL-PRF-39019/1 through 6 for the application government designations. The AIRPAX cage code number is 81541.