Square D MHL3645025DC1679 Molded Case Breaker

Square D by Schneider Electric MHL3645025DC1679 is a three‑pole molded‑case DC circuit breaker rated for 450 A and designed for 600 V DC distribution. It employs a thermal‑magnetic trip mechanism to protect DC feeders and loads from overloads and short circuits, making it suitable for high‑current DC applications such as UPS installations, data centers, and telecom power distribution. The 12‑digit part number encodes its key specifications—450 A operating current and 600 V DC rating in a 3‑pole configuration—with construction designed for compatibility with Square D DC MCCB enclosures and standard line/load terminations. This model represents the DC branch‑circuit protection typically used in centralized power systems where reliable interruption at elevated currents is required.