Eaton DCU2105URM DC Disconnect - NEMA 3R Heavy Duty
Part Number: DCU2105URM
Quick Summary
Eaton heavy duty DC disconnect DCU2105URM provides safe, code-compliant isolation for solar PV systems. In practice, installers face outdoor environments, space constraints, and rigorous inspection trails that complicate reliable DC isolation. This unit delivers UL-listed protection in a weather-resistant NEMA 3R enclosure, built from stainless steel for durability in harsh conditions. With a 400 A rating and 1000 VDC capability across two circuits, it supports scalable PV configurations while meeting industry standards. By combining rugged construction with straightforward installation, it reduces downtime, simplifies compliance documentation, and offers long-term value for engineers, procurement teams, and service contractors working on utility-scale or commercial solar projects.
Product Information
Extended Description
DCU2105URM Eaton: Eaton Heavy duty DC disconnect, DCU, 400 A, DC photovoltaic systems, NEMA 3R, Stainless steel, Non-fusible, Max:1000 Vdc, NEMA 3R, 2, Non-fusible
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2105URM
UPC
786685866178
Product Length/Depth
12.42 in
Product Height
57.47 in
Product Width
24.12 in
Product Weight
128 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Type
DC disconnect/ungrounded system
Amperage Rating
400 A
Number of circuits
2
Maximum voltage
1000 VDC
NEMA rating
NEMA 3R
Protection
Non-fusible
Application
Solar
System voltage
1000 VDC
Voltage rating
1000 VDC
Series
DC photovoltaic applications
Enclosure
NEMA 3R
Enclosure material
Painted galvanized steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Feature: 400 A rating across two non-fusible circuits delivers robust DC isolation for large solar arrays. Business Impact: minimizes the need for supplemental protection and reduces wiring complexity. Application: ideal for commercial and utility-scale PV feeders that demand dependable, code-compliant disconnects. Feature: 1000 VDC system voltage and 1000 VDC max supports higher-voltage PV configurations, enabling longer runs with fewer intermediate lugs while preserving protection margins. Business Impact: improves system layout flexibility and reduces voltage drop considerations. Application: suitable for mid-to-large DC distributions in outdoor solar farms. Feature: NEMA 3R enclosure with stainless steel construction provides weather resistance and long life in exposed installations. Business Impact: lowers maintenance costs and boosts uptime in remote or outdoor sites. Application: solar arrays exposed to rain, dust, or temperature extremes. Feature: Non-fusible, heavy-duty switch design simplifies protection strategy and reduces nuisance fuse failures. Business Impact: improves reliability, simplifies spare parts inventory, and lowers lifecycle costs. Application: DC PV safety disconnects where quick isolation is required. Feature: UL Listed status and a documented warranty support compliance and peace of mind. Business Impact: accelerates procurement approvals and aligns with corporate safety programs. Application: specs-driven projects in industrial and commercial solar sectors. Feature: Clear enclosure dimensions and robust weight support rack-level installations and serviceability. Business Impact: enables precise space planning, easier mounting, and faster commissioning. Application: field installations in industrial facilities and utility-backed solar projects.
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FAQs
When installing the DCU2105URM, ensure proper outdoor mounting in a compliant enclosure area with the NEMA 3R rating. Verify the unit's 12.42 in depth, 57.47 in height, and 24.12 in width to fit the designated footprint. Use appropriate mounting hardware and observe clearances for service access, with UL-listed wiring practices and two 400 A circuits wired for redundancy and fault isolation.
The DCU2105URM delivers a 400 A amperage rating across two non-fusible circuits, with a maximum and system voltage of 1000 VDC. It is designed for solar DC distribution, supporting non-fusible protection and a 2-circuit configuration suitable for medium to large PV installations, aligning with typical solar feeder architectures and safety standards.
Yes. The unit features a NEMA 3R enclosure made from painted galvanized steel and, when paired with stainless steel components, provides weather-resistant protection for outdoor solar installations. Its UL Listed certification reinforces suitability for outdoor PV applications, reducing environmental risks and enabling reliable performance in rain, dust, and temperature swings.
The DCU2105URM is UL Listed and designed for solar DC protection with a NEMA 3R enclosure. It supports a 1000 VDC system and is built to meet industry standards for electrical protection in photovoltaic applications, helping streamline procurement, installation approvals, and regulatory compliance in commercial and utility-scale projects.
Maintenance is minimized thanks to a non-fusible, rugged switch design and a durable steel enclosure, reducing fuse replacements and service intervals. The unit’s reliability supports lower downtime and faster commissioning, contributing to upfront cost savings and a favorable return on investment in solar installations where uninterrupted DC isolation is critical.