Eaton DCU1105FPM Heavy Duty DC Disconnect - UL Listed
Part Number: DCU1105FPM
Quick Summary
Eaton DCU1105FPM heavy duty DC disconnect is designed to safely isolate DC power for solar PV installations. Operators often struggle with reliable isolation points, corrosion, and bulky equipment that complicates maintenance. This unit carries UL Listed certification and features a NEMA 4 weatherproof enclosure, providing rugged outdoor performance. Its robust, painted galvanized steel enclosure and fusible protection support scalable solar projects while delivering consistent uptime. By aligning with standard electrical protection and circuit control practices, this disconnect helps streamline installation, maintenance, and compliance across industrial photovoltaic applications.
Product Information
Extended Description
DCU1105FPM Eaton: Eaton Heavy duty DC disconnect, DCU, 400 A, DC photovoltaic systems, Painted steel, Fusible, Max:1000 Vdc, NEMA 4, 1, Fusible
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1105FPM
UPC
786685866222
Product Length/Depth
12.43 in
Product Height
57.47 in
Product Width
24.12 in
Product Weight
120.5 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
1
Maximum voltage
1000 VDC
NEMA rating
NEMA 4
Protection
Fusible
Application
Solar
System voltage
1000 VDC
Voltage rating
1000 VDC
Series
DC photovoltaic applications
Enclosure
NEMA 4
Enclosure material
Painted galvanized steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
Feature: 400 A amperage rating enables a single-circuit isolation for high-current DC strings, reducing the number of components and simplifying wiring. Business Impact: Minimizes point-of-failure risk and lowers installation time, delivering tangible lifecycle savings in large solar deployments. Application: Ideal for utility-scale and commercial PV systems requiring robust, single-circuit DC protection. Feature: 1000 VDC maximum voltage capability supports modern high-voltage PV arrays, enabling safe disconnects without oversizing equipment. Business Impact: Improves system resilience to transients and simplifies protection coordination with upstream breakers. Application: Suitable for 1000 VDC solar configurations in outdoor environments. Feature: NEMA 4 enclosure with painted galvanized steel provides weatherproof, dust-resistant protection. Business Impact: Extends service life in challenging outdoor locations, reducing enclosure maintenance costs. Application: Outdoor solar and industrial DC protection installations. Feature: Fusible protection and heavy-duty switch design offer reliable isolation during routine maintenance and fault conditions. Business Impact: Enhances safety, reduces fuse replacement downtime, and supports quick fault clearance. Application: Solar PV and other DC power systems requiring dependable fusible protection. Feature: Compact, single-circuit DC disconnect with a 12.43 in depth and a footprint compatible with standard electrical assemblies. Business Impact: Simplifies integration with existing switchgear and control panels, cutting installation time. Application: Retrofit projects and new builds in electrical protection & circuit control environments.
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FAQs
DCU1105FPM is a one-circuit, 400 A disconnect rated for up to 1000 VDC, designed to mount within standard electrical enclosures. Its NEMA 4-rated, painted galvanized steel enclosure supports outdoor installation, while its compact 12.43 in depth eases integration with existing switchgear and control panels.
Key specs include a 400 A amperage rating, maximum voltage of 1000 VDC, single circuit configuration, fusible protection, and a heavy-duty switch type. The enclosure is NEMA 4, with a painted galvanized steel construction to withstand outdoor environments.
Yes. The unit features a NEMA 4-rated enclosure and UL Listed certification, designed to resist rain, dust, and other environmental factors. Painted galvanized steel provides corrosion resistance, making it appropriate for outdoor solar installations and industrial settings.
It is best suited for solar photovoltaic systems requiring reliable DC isolation, particularly where high current and elevated voltages are present. Its fusible protection and rugged enclosure also make it suitable for industrial DC protection tasks and maintenance-safe isolation in outdoor facilities.
Warranty is Eaton’s standard policy: one year from installation or eighteen months from shipment, whichever occurs first. For maintenance, inspect the fusible components and enclosure seals periodically, and replace fuses as specified to maintain safe, compliant operation.