Eaton JGSDC3090FAW PV Guard - Complete DC MCCB, UL 489

Three-pole construction with the JG frame provides coordinated protection across PV DC circuits, helping prevent cascading faults. The 90 A amperage rating paired with 600 Vac and 250 Vdc voltage ratings gives solid fault handling for modern solar installations. In practice, this means fewer mis-trips during transient conditions, greater protection for inverters and DC conductors, and improved system uptime in commercial and utility-scale PV projects. Because the unit is specified without terminals, installation is streamlined in compact PV enclosures where space and wiring cavities are at a premium. External termination options and compatibility with Eaton’s PVGuard accessories simplify wiring, shorten panel assembly times, and reduce stocking complexity. The result is faster commissioning, lower labor costs, and a cleaner, safer electrical bus in PV combiner boxes and inverter interfaces. The fixed thermal, adjustable magnetic trip (T185) delivers precise, field-adjustable protection that can be tuned to inverter fault currents and PV string configurations. This allows designers to coordinate with upstream devices, minimize nuisance trips, and maintain consistent protection across temperature variations. In practice, it supports reliable DC fault clearance in fluctuating solar irradiance environments and helps protect critical equipment. With industry-leading interrupt ratings—85 kAIC at 240 Vac, 35 kAIC at 480 Vac, and 18 kAIC at 600 Vac—the JGSDC3090FAW can safely interrupt high fault currents common in PV and utility-interactive systems. This margin reduces arc energy exposure for feeders, minimizes conductor damage, and supports safer commissioning and maintenance routines in rooftop and ground-mounted PV configurations. UL 489 certification underpins safety and compliance for molded case breakers used in electrical protection schemes, including PVGuard installations. As part of the Series G PV protection family, the JGSDC3090FAW integrates with Eaton’s broader protection ecosystem for scalable solar deployments. The unit weighs about 6.5 lb and measures 3.44 in by 7.0 in by 4.13 in, balancing rugged performance with compact form for space-constrained panels. Warranty follows Eaton policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first.