JLL37150D81

The JLL37150D81 is a 3-pole thermal-magnetic molded case circuit breaker from Schneider Electric’s Square D PowerPact J-Frame DC series, designed for overcurrent protection on ungrounded DC systems in industrial and commercial applications. Rated for 150 at 500, it is suited to DC power distribution, such as battery banks and uninterruptible power supply (UPS) systems. Its unit-mount design installs directly into compatible enclosures, switchboards, and equipment panels. Electrically, the JLL37150D81 combines a thermal-magnetic trip mechanism with dual-break rotating contacts, which help reduce peak current during a short circuit fault. It carries an interrupting capacity of {aic rating}, giving it dependable fault protection on high-energy DC circuits. Because it is engineered specifically for DC service, the JLL37150D81 should be applied only on ungrounded DC systems within its rated voltage, rather than as a substitute for an AC-rated breaker. Mechanically, the JLL37150D81 has lug connections on both the line and load sides and accepts 4 AWG to 4/0 AWG copper or aluminum conductors. It is built on the compact J-frame, with an integral push-to-trip button in the cover for manual testing of the trip mechanism. UL listed and CCC certified, the JLL37150D81 is a dependable choice for new DC installations or as a replacement in existing PowerPact J-Frame DC equipment. Purchase the JLL37150D81 at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes trusted circuit breakers from manufacturers like Square D, Schneider Electric, Siemens, Eaton, and Cutler-Hammer, backed by a knowledgeable sales team ready to assist with technical questions, product selection, and support.