Square D LH26300AB 300A 2-Pole 600V LH High Interrupting I-Line Breaker Phase AB
400A Frame | 300A | 2P | 65kA@240V, 35kA@480V, 25kA@600V | Thermal-Magnetic
The LH26300AB is a Square D LH-frame two-pole 300-ampere molded case circuit breaker from the Q4 Legacy product line by Schneider Electric. This I-Line plug-on breaker connects to Phase A and Phase B of the bus, providing targeted two-pole protection in three-phase I-Line panelboards and switchboards. Rated for 600 Vac / 250 Vdc with a 400A frame size, it delivers high interrupting capacity of 65 kAIC at 240 Vac, 35 kAIC at 480 Vac, and 25 kAIC at 600 Vac. DC interrupting ratings are 50 kAIC at 125 Vdc and 50 kAIC at 250 Vdc. The thermal-magnetic trip unit provides LI (Long-Time and Instantaneous) protection with an adjustable magnetic trip range of 1500A to 3200A, allowing customization for specific load characteristics. The AB phase designation enables precise bus connection configuration in multi-phase distribution systems. Featuring plug-on I-Line mounting technology, the LH26300AB ensures quick installation and removal without de-energizing the entire panelboard. Wire connections accommodate (1) 1 AWG-600 kcmil or (2) 1 AWG-250 kcmil Al/Cu. The unit measures 11.0 x 4.0 x 5.84 in and weighs approximately 25 lbs. Manufactured to UL 489 and CSA C22.2 No. 5.1 standards, this breaker is engineered for industrial and commercial power distribution requiring reliable overcurrent protection with the convenience of I-Line plug-on connectivity.
Key Features
This PowerPact MCCB features Thermal-Magnetic trip protection rated 300A at 600 Vac / 250 Vdc. Frame size: 400A. Interrupting capacity: 65kA@240V, 35kA@480V, 25kA@600V. Designed for reliable overcurrent protection in industrial and commercial power distribution systems.
Applications
Suitable for main distribution panels, motor control centers, switchboards, and feeder circuit protection in industrial facilities, data centers, and commercial buildings. Compliant with UL 489, CSA C22.2 No. 5.1.
