Emerson NFS 815 1321/200 Circuit Breaker 200A Power Control & Fuse Module

The Emerson NFS 815 1321/200 is an industrial-grade 200-Ampere magnetic-hydraulic circuit breaker designed for high-power DC distribution within Power Control & Fuse Modules. This component is engineered to provide primary overcurrent and short-circuit protection for heavy-duty telecommunications infrastructure, including main power feeds for large-scale base stations, core switching centers, and high-capacity battery strings. The magnetic-hydraulic trip mechanism ensures that the 200A current threshold remains accurate and unaffected by ambient temperature fluctuations, which is vital for maintaining system stability in diverse environments ranging from temperature-controlled data centers to outdoor power enclosures.Designed for DC applications up to 80V, the module features high-performance arc-suppression chambers and reinforced contact surfaces to ensure safe interruption of high-energy fault currents. Its mechanical architecture is optimized for low-loss electrical conduction, minimizing voltage drops and heat generation during continuous high-load operation. The unit is equipped with a heavy-duty toggle actuator that allows for reliable manual circuit isolation and provides immediate visual feedback of the operational status. The mounting interface and terminals are specifically designed for high-current busbar integration, ensuring a secure and low-resistance physical connection.
Built for mission-critical reliability, the NFS 815 1321/200 complies with international safety standards, including UL and CE certifications for telecommunications power equipment. The "trip-free" safety design guarantees that the internal contacts will separate during a fault event even if the actuator handle is manually obstructed or held in the "ON" position. The unit is hardened against vibration and mechanical shock, ensuring long-term durability in industrial and telecommunications deployments. This 200A module is an essential part of high-capacity NetSure DC power plants, providing dependable protection for the most power-intensive network elements.