Square D FHB36030G I-Line Thermal Magnetic Circuit Breaker

Square D FHB36030G I-Line thermal-magnetic circuit breaker is a 3-pole, 30 A unit rated for 600 VAC, designed for plug-on I-Line busway installations. It uses a thermal-magnetic trip mechanism that provides overload protection with an instantaneous magnetic trip for short circuits and is rated 80% for continuous operation. The model carries an 18 kA interrupting capacity at 600 VAC, and its W SHUNT accessory enables remote or auxiliary tripping in compatible Square D panels. This 3‑pole breaker protects three-phase feeders and branch circuits in commercial and industrial distributions, with line-side I-Line connections arranged ABC and standard load-side terminals. As part of the FH/I-Line family, the FHB36030G is a molded-case breaker built for reliable protection in systems that require compact plug-on installation in I-Line panelboards and busway networks.