Square D KC34150 150A 3-Pole Thermal-Magnetic Circuit Breaker

Engineered for industrial use, this 150A, 3-pole MCCB belongs to the Square D legacy K-Frame family, delivering dependable long-time and instantaneous (LI) protection. The plug-on I-Line mounting configuration snaps securely into Square D I-Line panelboards. Facilities looking to modernize can substitute this unit with the PowerPact JJA36150. With a 65 kAIC rating at 480VAC, it handles demanding fault conditions using fixed thermal and adjustable magnetic trip settings.