UPL1-27944-2

The Sensata UPL1-27944-2 is a single pole hydraulic magnetic circuit breaker from the APL/UPL series. This legacy product is designed for reliable, low-cost power switching, circuit protection, and circuit control. The lever actuator functions like an ON-OFF switch under normal load conditions, but the internal mechanism trips and forcibly returns the handle to the OFF position upon overload. This 'trip free' design ensures the internal contacts will not remain closed during an overload, even if the handle is held in the ON position.

This circuit protector is suitable for industrial, military, and information processing applications where precision operation is required. It features a panel mount design for easy integration into systems. While specific current and voltage ratings are not detailed here, the APL/UPL line offers various configurations including series, shunt, and relay types with a choice of delays and ratings.

Most versions of the APL/UPL family are recognized by UL per UL STD. 1077 as supplementary protectors and certified by CSA per CSA STD. C22.2–No. 235 as supplementary protectors. The UPL prefix designates these certifications. The product is noted as a legacy item, and Sensata Technologies recommends the Airpax™ IAL series for new design-ins.