The Square D FJA140205 U is a 20 A, single-pole molded-case circuit breaker rated for 277 V AC systems and carrying a 65 kA interrupting capacity. It installs in Square D panelboards and switchboards that require a compact, bolt-on device for branch-circuit protection in commercial and light-industrial applications such as 277 V lighting, HVAC controls, or small-motor circuits. The FJA frame provides thermal-magnetic trip action with fixed long-time and instantaneous settings, and its 1-inch-wide footprint allows dense packing in standard enclosures while meeting UL 489 requirements for molded-case breakers.
