Eaton DCU2105FRM DC Disconnect - NEMA 3R, 400A
Part Number: DCU2105FRM
Quick Summary
Eaton DCU2105FRM DC disconnect provides rugged, high-current isolation for solar PV systems. Engineers often struggle with safe, code-compliant DC switching in outdoor sites where space is tight and fault risk is high. UL Listed protection in a NEMA 3R enclosure, plus a painted galvanized steel housing, addresses reliability and safety requirements in harsh environments. With a 400 A capacity, two circuits, and a 1000 VDC rating, this unit scales with growing PV arrays while simplifying procurement and installation. The fusible protection feature supports safer maintenance and reduces downtime, contributing to lower total cost of ownership for commercial and utility-scale solar projects.
Product Information
Extended Description
DCU2105FRM Eaton: Eaton Heavy duty DC disconnect, DCU, 400 A, DC photovoltaic systems, NEMA 3R, Stainless steel, Fusible, Max:1000 Vdc, NEMA 3R, 2, Fusible
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2105FRM
UPC
786685866253
Product Length/Depth
12.42 in
Product Height
57.47 in
Product Width
24.12 in
Product Weight
133 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
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
Fusible
Switch type
Heavy duty
Protection
Fusible
Feature: 400 A amperage rating with two circuits enables handling larger DC strings without the need for multiple disconnects, reducing cabinet clutter and installation time. Business impact: improved system reliability and easier expansion, lowering total installed cost and maintenance complexity. Application: suitable for mid to large solar PV arrays. Feature: Maximum voltage of 1000 VDC supports modern PV strings while maintaining safety margins, enabling fewer components in the DC path. Business impact: enhanced safety and design flexibility, reducing project risk. Application: grid-tied and standalone PV installations up to 1000 VDC. Feature: NEMA 3R outdoor-rated enclosure provides weather resistance and vandal protection in rooftops or outdoor equipment spaces. Business impact: longer service life, less corrosion-related downtime, and lower replacement costs. Application: outdoor solar PV disconnects in commercial facilities. Feature: Fusible protection offers built-in fault isolation, limiting damage during short circuits and arc events. Business impact: improved fault response and safety compliance, reducing energy loss and downtime. Application: DC protection in PV systems where fuse protection is required by design. Feature: UL Listed certification confirms compliance with recognized safety standards, easing procurement and installation approvals. Business impact: accelerates inspections and reduces risk during audits. Application: any code-required electrical installations. Feature: Enclosure material of painted galvanized steel provides durable, cost-effective protection with straightforward maintenance. Business impact: lowers lifecycle costs and supports long-term reliability. Application: outdoor DC disconnects in industrial and commercial sites. Feature: Overall dimensions and weight, including 12.42 in depth, 57.47 in height, 24.12 in width, and 133 lb, inform mounting and space planning. Business impact: precise fit guidance for existing enclosures and retrofit projects. Application: site layout and electrical room planning.
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FAQs
The DCU2105FRM is designed for outdoor solar PV installations with up to 1000 VDC system voltage, featuring two 400 A circuits in a NEMA 3R enclosure. Its fusible protection and UL Listed status enhance safety and compliance, while its dimensions and weight support straightforward mounting in standard electrical spaces.
It accommodates up to 1000 VDC and provides two circuits with fusible protection, offering reliable fault isolation. This setup reduces arc energy in maintenance scenarios and aligns with common PV system design practices, simplifying integration with other DC protection devices.
Yes. The unit uses a NEMA 3R enclosure with a painted galvanized steel body, built for outdoor exposure. Its UL Listed certification further confirms suitability for exterior environments, helping installers meet code and safety requirements while withstanding weather and temperature variations.
The DCU2105FRM carries UL Listed certification and a NEMA 3R enclosure rating, confirming outdoor durability and compliance with electrical safety standards. These certifications streamline approvals with inspectors and support long-term reliability in harsh operating conditions.
Fusible protection enables quick fault isolation, reducing downtime and energy losses during faults. The rugged enclosure lowers replacement and maintenance costs, while UL Listing and robust outdoor design improve field reliability, contributing to a favorable total cost of ownership over the project lifecycle.