Square D MHL3685003901 Molded Case Circuit Breaker

Square D MHL3685003901 is a three-pole molded‑case circuit breaker from Square D, catalogued as MHL3685003901. It provides overcurrent protection for three‑phase circuits rated up to 600 V and 500 A, making it suitable as a main or feeder breaker in industrial power distribution. The unit includes an undervoltage release (UV) and an auxiliary contact (AUX), and ships with the AK accessory kit to support additional control and signaling needs. This MCCB is designed for industrial panels and motor control centers where high-current protection, reliable interrupting capability, and the flexibility of accessories are required. Its three‑pole configuration supports balanced protection of all phases in a three-phase system, helping maintain motor starting stability and protection of feeders in demanding environments.