Eaton DCU2103UPM Heavy Duty DC Disconnect - NEMA 4, 1000 VDC
Part Number: DCU2103UPM
Quick Summary
Eaton heavy duty DC disconnect provides a reliable, 100 A non-fusible switch for solar photovoltaic (PV) systems. Engineers and procurement teams often struggle with safe, code-compliant DC isolation in outdoor PV arrays without prompting extended downtime. It meets NEC 690 requirements per UL 1741 and UL 98B, with a NEMA 4 enclosure and 1000 VDC rating to withstand harsh environments. With its rugged enclosure and straightforward compatibility, it supports streamlined installation, lower lifecycle costs, and safer maintenance in solar projects. This combination reduces downtime risk during string maintenance and improves overall system reliability. By offering robust protection against weather and electrical surges, it supports long-term uptime.
Product Information
Extended Description
DCU2103UPM 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, 2, DC photovoltaic applications, Rating:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2103UPM
UPC
786685558073
Product Length/Depth
10.22 in
Product Height
24.95 in
Product Width
16.13 in
Product Weight
37 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
NEC 690 per UL 1741 UL 98B
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.
Special features
For Ungrounded PV Systems
Type
DC disconnect/ungrounded system
Amperage Rating
100A
Number of circuits
2
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 with two circuits. Business Impact: Enables independent DC isolation paths, reducing fault propagation and allowing safer maintenance; Application: Solar PV arrays and ungrounded systems benefit from clear circuit separation. Feature: Non-fusible protection. Business Impact: Simplifies selection and reduces nuisance fuse changes while enabling swift maintenance; Application: Utility-scale and commercial PV installations seeking straightforward protection. Feature: 1000 VDC system voltage rating. Business Impact: Supports high-voltage PV strings and future-proof designs, ensuring compliance with modern module voltages; Application: DC photovoltaic applications in harsh outdoor environments. Feature: NEMA 4 enclosure with painted galvanized steel. Business Impact: Delivers weatherproof enclosure for outdoor installations, improving durability and reducing enclosure corrosion costs; Application: Outdoor PV arrays and harsh industrial sites. Feature: Main lug capacity accommodating #14-1/0 AWG wires. Business Impact: Simplifies wiring and upgrade paths, minimizing labor during installation and service; Application: PV string wiring and field terminations. Feature: Ungrounded system feature for PV setups. Business Impact: Supports specific ungrounded topologies, enhancing fault isolation and safety; Application: Ungrounded PV configurations in solar projects. Feature: Certifications and compliance (NEC 690 per UL 1741, UL 98B). Business Impact: Provides regulatory alignment, streamlines audits, and reduces rework; Application: Code-compliant solar installations and inspection readiness. Feature: Physical dimensions and weight support install planning (10.22 in L, 16.13 in W, 24.95 in H, ~37 lb). Business Impact: Enables accurate site layout, mounting selection, and transport planning; Application: Field deployment and retrofit projects. Feature: Compatibility with lugs and wiring spec (#14-1/0 AWG). Business Impact: Ensures reliable terminations, minimizes reworks, and accelerates commissioning; Application: New builds and upgrades in PV systems.
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FAQs
For outdoor PV installs, use the DCU2103UPM with a NEMA 4 rated enclosure to resist weather ingress. Ensure proper mounting clearance, follow the product dimension tables for enclosure footprint, and connect wiring with #14-1/0 AWG lugs. Verify that the ungrounded configuration aligns with the array topology and local code requirements, referencing Eaton's specification sheet for mounting guidance.
The unit provides two independent 100 A circuits, allowing isolated DC paths for separate PV strings. Design protections per circuit to 100 A, and ensure system voltage stays within 1000 VDC. Use appropriate overcurrent protection and conductors, which simplifies wiring, reduces fault cascades, and speeds field commissioning in solar installations.
The DCU2103UPM aligns with NEC 690 requirements and UL 1741 for PV safety, with UL 98B approval for enclosure protection. The NEMA 4 painted steel enclosure supports outdoor use, and the 1000 VDC rating accommodates modern PV arrays. Always cross-check local regulations and interconnection standards with the project spec and inspector guidance.
Designed for Ungrounded PV Systems, this disconnect helps minimize potential ground fault pathways and simplifies string isolation in certain topologies. It supports safe DC shutdown without introducing unintended grounding paths, which is beneficial for specific international or utility-scale configurations while maintaining compliance with relevant standards.
Eaton offers a dedicated specification sheet for the DCU2103UPM with wiring recommendations, dimension data, and installation notes. Warranty coverage includes one year from installation or eighteen months from shipment. For configuration options beyond the standard two-circuit setup, consult the catalog notes and the official datasheet to ensure proper integration.