Eaton DCU1103UPM DC disconnect - UL 98B, 1000 VDC
Part Number: DCU1103UPM
Quick Summary
Eaton DCU1103UPM heavy duty DC disconnect provides reliable isolation for solar DC circuits. Engineers often struggle with rugged enclosures and safe, code-compliant ungrounded switching in outdoor PV arrays. This unit carries UL 98B and NEC 690 per UL 1741 compliance, along with a NEMA 4 enclosure to withstand harsh environments in outdoor installations. Designed for solar applications, it offers non-fusible protection and a 1000 VDC rating to simplify installation in utility-scale and commercial PV projects, supporting efficient, safe operation and straightforward integration with standard DC wiring practices.
Product Information
Extended Description
DCU1103UPM Eaton: Eaton Heavy duty DC disconnect, 100 A, NEMA 4, Painted steel, Non-fusible, Ungrounded, #14-1/0 AWG lug capacity, #14-1/0 AWG solid return, 1, DC photovoltaic applications, Rating:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU1103UPM
UPC
786685557953
Product Length/Depth
10.22 in
Product Height
24.95 in
Product Width
11.79 in
Product Weight
24 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 98B NEC 690 per UL 1741
Catalog Notes
Not all configurations for ampere rating and number of circuits are available. All circuit configurations can be found in the product dimension tables.
Type
DC disconnect/ungrounded system
Amperage Rating
100A
Number of circuits
1
Ground
Ungrounded
Protection
Non-fusible
Application
Solar
Main lug wire size
#14-1/0 AWG lug capacity, #14-1/0 AWG solid return
System voltage
1000 VDC
Voltage rating
1000 VDC
Series
DC photovoltaic applications
Enclosure
NEMA 4
Enclosure material
Painted galvanized steel
Fuse configuration
Non-fusible
Switch type
Heavy duty
Protection
Non-fusible
Feature: 100 A amperage rating. Business Impact: Handles typical PV string outputs with built-in safety margins, reducing the need for multiple devices and enhancing overall system reliability. Application: Solar DC disconnects for 1000 VDC systems. Feature: NEMA 4 enclosure in painted galvanized steel. Business Impact: Provides weather-resistant protection against rain, dust, and corrosion, lowering field failure rates and maintenance costs. Application: Outdoor rooftop and ground-mounted PV installations. Feature: Ungrounded, non-fusible design. Business Impact: Simplifies safe isolation and reduces arc-flash risk during maintenance, improving crew safety. Application: DC photovoltaic circuits in ungrounded configurations. Feature: Main lug capacity of #14-1/0 AWG. Business Impact: Enables flexible, code-compliant wiring without extra lugs or adaptors, shortening wiring tasks. Application: PV array connections and neutral/return paths. Feature: Certifications UL 98B and NEC 690 per UL 1741; NEMA 4 compliance. Business Impact: Ensures regulatory alignment, faster inspections, and project approvals. Application: Utility-scale and commercial solar installations requiring formal compliance. Feature: Single circuit, 1000 VDC system voltage. Business Impact: Streamlines design and BOM, reducing part count and installation time. Application: Compact solar DC systems and string-level isolation.
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FAQs
DCU1103UPM provides a 100 A, 1 circuit, ungrounded non-fusible DC disconnect rated at 1000 VDC, suitable for solar photovoltaic applications. Its lug capacity supports #14-1/0 AWG conductors, enabling straightforward integration with common PV arrays and inverters. The device is designed for outdoor use with a NEMA 4 enclosure, reducing field rework and improving installation reliability.
This unit is UL 98B listed and supports NEC 690 requirements per UL 1741, aligning with widely adopted PV safety standards. It also features a NEMA 4 enclosure, providing weather resistance for outdoor environments. These certifications help streamline inspections and ensure compliance for both utility-scale and commercial solar projects.
DCU1103UPM uses a NEMA 4 rated enclosure constructed from painted galvanized steel. This combination delivers robust protection against dust, rain, and corrosion in exterior installations, helping maintain performance and extending service life in challenging environments.
The disconnect measures 10.22 inches in depth, 24.95 inches in height, and 11.79 inches in width, with a shipping weight of 24 pounds. These dimensions optimize mounting in standard electrical enclosures and support straightforward retrofits in existing PV installations.
Eaton provides a warranty per policy 25-000: one year from the date of installation or 18 months from shipment, whichever occurs first. This warranty coverage supports maintenance planning and downtime minimization, with access to Eaton’s service and replacement parts if needed.