Eaton DCU1101URM DC Disconnect - NEMA 3R, 1000 VDC

Feature: 30 A rating, non-fusible, ungrounded DC disconnect provides a straightforward safety valve for solar PV builds. This configuration directly reduces arc-flash exposure and unplanned downtime by enabling deliberate, visible isolation at the source during commissioning and maintenance. It is well-suited to single-circuit solar DC isolations within 1000 VDC systems and supports modular plant layouts, backfeed control, and safe tie-in with string combiner boxes. The lug arrangement matches common PV conductor sizes (#14-#2 AWG for both lugs and solid returns), simplifying field wiring and reducing mis-wire risk. Enclosure and durability: The NEMA 3R enclosure in painted galvanized steel withstands outdoor and harsh environments, providing corrosion resistance, rain exposure protection, and secure mounting in exposed locations. This translates into lower maintenance cycles and fewer weather-related failures, saving down-time costs over the system life. It is compatible with surface mounting or back-box integration in rooftop or ground-mounted solar installations and supports retrofits in existing electrical rooms where space is at a premium. Electrical practicality: Main lug connections accept #14-#2 AWG wire and solid returns, delivering flexible installation and compatibility with common DC solar cabling. The compact footprint (9.89 in depth, 8.5 in height, 8.87 in width) and ~6 lb weight enable easy integration into prefabricated enclosures and service panels. The device’s ungrounded configuration aligns with PV array topologies that minimize ground reference pathways, while non-fusible protection keeps maintenance straightforward and reduces fault-clearing time. Certifications and rating: Rated for 1000 VDC, it supports NEC 690 requirements per UL 1741 and UL 98B, with an ungrounded, non-fusible design that simplifies compliance and reduces maintenance complexity. The enclosure's NEMA 3R rating ensures rain and corrosion resistance, while the heavy-duty switch construction provides durable operation in frequent switching tasks. Warranty is Eaton's standard policy (one year from installation or 18 months from shipment), underscoring the product's confidence in long-term performance. Procurement and maintenance value: Standardizing on the DCU1101URM reduces BOM proliferation across projects and streamlines procurement through a repeatable, field-proven component. The non-fusible, ungrounded design minimizes spare parts and reduces maintenance downtime, while the form factor and lug compatibility accelerate installation in new builds and retrofits. For solar developers, utilities, and industrial facilities seeking predictable performance and lower lifecycle costs, this device delivers a practical balance of ruggedness, ease of use, and regulatory alignment.