Square D LH36125 125A 3-Pole 600V LH High Interrupting I-Line Circuit Breaker
400A Frame | 125A | 3P | 65kA@240V, 35kA@480V, 25kA@600V | Thermal-Magnetic
The LH36125 is a Square D LH-frame three-pole 125-ampere molded case circuit breaker engineered by Schneider Electric for the Q4 Legacy circuit breaker platform. This I-Line plug-on breaker delivers high interrupting capacity in a 400A frame, rated for 600 Vac / 250 Vdc. Interrupting ratings are 65 kAIC at 240 Vac, 35 kAIC at 480 Vac, and 25 kAIC at 600 Vac, with DC ratings of 50 kAIC at 125 Vdc and 50 kAIC at 250 Vdc. Equipped with a thermal-magnetic trip unit providing LI (Long-Time and Instantaneous) protection, the LH36125 features an adjustable magnetic instantaneous trip from 625A to 1250A. This adjustability enables precise coordination with upstream and downstream protective devices for optimized selective coordination in power distribution systems. The I-Line plug-on mounting design allows for fast, efficient installation directly onto Square D I-Line panelboard and switchboard bus bars without tools for bus connection. The breaker accommodates wire sizes of (1) 1 AWG-600 kcmil or (2) 1 AWG-250 kcmil Al/Cu and features dimensions of 11.0 x 6.0 x 5.84 in with an approximate weight of 20 lbs. Built to UL 489 and CSA C22.2 No. 5.1 standards, the LH36125 is suitable for industrial, commercial, and institutional electrical distribution applications. As part of the proven Square D Q4 Legacy product line, it provides dependable three-phase overcurrent protection with the flexibility and serviceability of I-Line plug-on technology.
Key Features
This PowerPact MCCB features Thermal-Magnetic trip protection rated 125A 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.
