Eaton DCU2104FWM DC disconnect - NEMA 4X Fusible 1000V
Part Number: DCU2104FWM
Quick Summary
Eaton heavy duty DC disconnect provides safe isolation for solar PV systems, enabling reliable maintenance. Facilities struggle with outdoor exposure, corrosion risk, and downtime during maintenance, risking equipment damage and unsafe DC isolation. UL 98B, NEC 690 per UL 1741, and NEMA 4X ratings ensure rugged outdoor performance and code compliance. Designed for DC photovoltaic applications, it combines 200 A capacity with flexible wiring options and durable 304 stainless steel construction, delivering long service life and lower lifecycle costs. This translates to faster installation for integrators and improved uptime for end users. Industry teams rely on Eaton's clear specifications to deliver safe, scalable PV projects.
Product Information
Extended Description
DCU2104FWM Eaton: Eaton Heavy duty DC disconnect, 200 A, NEMA 4X, Grade 304 stainless steel, Fusible, LC: In 300 MCM-#6 out 300 MCM-#6. SR: in 300 MCM-#6 out 300 MCM-#6. EG: in #4-#14 AWG out 1/0-#14, Max:1000 Vdc, NEMA 4X, 2, Fusible, System:1000 Vdc
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2104FWM
UPC
786685625720
Product Length/Depth
35.38 in
Product Height
11.63 in
Product Width
16.54 in
Product Weight
45 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
Type
DC disconnect/ungrounded system
Amperage Rating
200 A
Number of circuits
2
Maximum voltage
1000 VDC
NEMA rating
NEMA 4X
Protection
Fusible
Application
Solar
Main lug wire size
LC: In 300 kcmil-#6 out 300 kcmil-#6. SR: in 300 kcmil-#6 out 300 kcmil-#6. EG: in #4-#14 AWG out 1/0-#14
System voltage
1000 VDC
Voltage rating
1000 VDC
Series
DC photovoltaic applications
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - DCU2104FWM
Selling Policy 25-000 - Distribution and Control Products and Services
200 A, two circuits, and fusible design deliver robust fault protection while accommodating diverse solar array configurations. The business impact is reduced fuse replacements, improved fault isolation, and easier alignment with NEC 690 requirements. In practice, this enables safer DC string control and streamlined maintenance in commercial and utility-scale PV installations. NEMA 4X enclosure in 304 stainless steel provides weatherproof protection for outdoor installations. The result is extended service life in harsh environments and lower corrosion-related downtime. This enclosure keeps critical connections protected from rain, humidity, and temperature cycling, helping installers meet outdoor installation standards with confidence. With a 1000 VDC maximum rating, the DCU2104FWM supports higher-voltage PV configurations, enabling longer strings and simpler wiring. This reduces wiring complexity, shortens commissioning times, and improves safety margins for field technicians. The unit offers flexible wiring terminations—LC, SR, and EG options—across a wide range of conductor sizes for diverse site conditions. UL 98B and NEC 690 compliances per UL 1741 reduce compliance risk and support audit readiness. The rugged construction and safety features translate to less field rework and lower total cost of ownership. Operators gain predictable performance in both new builds and retrofits of solar DC systems. This product is designed for plug-and-play integration with Eaton protection devices and standard mounting footprints, simplifying installation and future upgrades. The combination of form factor, materials, and ratings provides a scalable solution for growing solar projects and multi-string arrays.
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FAQs
Plan for outdoor mounting with a 304 stainless steel, NEMA 4X enclosure to protect terminals from weather. Ensure conductors meet LC, SR, and EG termination ranges (In 300 kcmil-#6 out 300 kcmil-#6 for LC, similar ranges for SR) and provide proper clearance for safe operation. Verify enclosure door access, fuse pull points, and labeling to meet NEC 690 requirements.
A 1000 VDC rating allows higher string voltages and longer conductor runs, reducing the number of junctions and simplifying wiring schemes. This supports larger solar installations with fewer components, lowering installation time and improving overall system efficiency while maintaining safe isolation and compliance with PV-specific standards.
Yes. The DCU2104FWM is UL 98B listed and rated for NEC 690 per UL 1741, providing proven protection for outdoor solar DC circuits. This alignment helps with inspections, reduces redesign risk, and supports field approvals for compliant solar installations in varied climates.
Its 304 stainless steel enclosure and NEMA 4X rating deliver superior corrosion resistance and weatherproof protection. This design supports outdoor PV installations, withstands moisture and temperature cycling, and minimizes maintenance costs by reducing enclosure-related failures over the system lifetime.
The fusible configuration reduces fault propagation and enables predictable protection, lowering field fault repair time. Its rugged enclosure and high current rating shorten downtime during maintenance, while compatibility with standard wiring and Eaton components simplifies upgrades, contributing to lower lifecycle costs and faster project payback for solar deployments.