Square D ML-3 997317 Bolt-On Molded Case Circuit Breaker

Square D ML-3 997317 bolt-on molded case circuit breaker is a three-pole protection device for 600-volt three-phase systems, rated at 125 A. Catalog number 997317, it belongs to Square D’s ML-3 bolt-on family and is designed for direct mounting in compatible panels or switchgear to protect feeders and motors in industrial applications. The breaker is rated for 600V AC and offers a 125 A trip rating with an interrupting capacity of 10 kA at 600V, delivering robust fault-current protection for standard industrial power distributions. Constructed as a molded-case breaker, it supports bolt-on mounting and fits conventional enclosure and busbar configurations used in many legacy Square D installations. While exact panel compatibility should be verified against your enclosure’s labeling, the 997317 model is commonly listed by distributors as a 125A, 3-pole, 600V MCCB option for legacy and retrofit projects. Square D, a brand of Schneider Electric, provides this ML-3 style as part of its longer-running line of molded case breakers, with many wholesale listings confirming the same amperage, voltage, and three-pole specifications for this catalog number.