Eaton / Cutler-Hammer FAZ-D5/3-NA Miniature Circuit Breaker

The "D" indicates a D-curve trip characteristic. D-curve miniature circuit breakers have a magnetic trip point of 10 to 20 times the rated current, making them ideal for applications with high inrush currents such as motors, transformers, and power supplies.

The "-NA" suffix indicates that the breaker is UL 489 listed for branch circuit protection in North America. This distinguishes it from standard FAZ breakers that are only UL 1077 recognized for supplementary protection.

Yes, this miniature circuit breaker is suitable for reverse feed applications. Power can be supplied to either the line or load side terminals without affecting the device's protective capabilities.

The box lug terminals on the FAZ-D5/3-NA are rated for copper (Cu) wire only. They accept a single wire from 18 to 6 AWG or two wires from 18 to 10 AWG.

For copper conductors, torque the terminals to 21 lb-in for 18 to 12 AWG wire, 25 lb-in for 10 to 8 AWG wire, and 36 lb-in for 6 AWG wire.

Yes, it features a current-limiting design that interrupts fault currents within one-half cycle. This fast interruption reduces peak let-through energy, offering superior protection for downstream circuit components.

Yes, it incorporates a trip-free design. The breaker will trip internally during an overcurrent or short-circuit event even if the operating handle is physically held in the ON position.

Yes, the FAZ-D5/3-NA carries an SWD (Switching Duty) rating, meaning it is approved for switching fluorescent lighting loads on a regular basis.

This breaker accepts field-installable accessories including auxiliary contacts, shunt trips, undervoltage releases, and lockout attachments. It is also compatible with Eaton UL 489 busbar systems for multi-breaker panel assemblies.