Eaton Moeller FAZ-B4 1-NA-SP DIN Rail Circuit Breaker

The Eaton Moeller FAZ-B4 1-NA-SP DIN rail circuit breaker is a single-pole protective device designed for mounting on standard DIN rails in electrical enclosures, providing straightforward overcurrent protection in distributed panel layouts. It is rated for 4 A with voltage ratings of 277 VAC and 48 VDC, enabling protection for circuits that may operate on either AC mains or DC control power within the same cabinet. The model designation FAZ-B4 1-NA-SP identifies a one-pole configuration in Eaton's Moeller FAZ family, engineered to fit compact control and distribution sections without sacrificing reliability. This device delivers overcurrent protection for a single circuit, and its DIN rail mount form factor is compatible with common industrial electrical installations across enclosures, panels, and rail systems. Typical uses include safeguarding branch circuits in control panels and power distribution enclosures where 277 VAC or 48 VDC supplies are present, offering a clear path to interrupt current during fault conditions.