Eaton DCU2105FXM Heavy Duty DC Disconnect - NEMA 4X
Part Number: DCU2105FXM
Quick Summary
DCU2105FXM is a heavy-duty DC disconnect designed for solar photovoltaic (PV) systems. Engineers face challenges with outdoor isolation, corrosion resistance, and maintenance accessibility, making reliability essential. This unit is UL Listed and housed in a NEMA 4X enclosure, featuring 316 stainless steel construction for harsh environments. With fusible protection up to 1000 VDC and a 400 A rating across two circuits, it delivers safe, dependable fault isolation. In PV deployments, this translates to reduced downtime, easier compliance management, and a stronger safety posture for critical electrical protection and control.
Product Information
Extended Description
DCU2105FXM Eaton: Eaton Heavy duty DC disconnect, DCU, 400 A, DC photovoltaic systems, Grade 316 stainless steel, Fusible, Max:1000 Vdc, NEMA 4X, 2, Fusible
Product Name
Eaton heavy duty DC disconnect
Catalog Number
DCU2105FXM
UPC
786685866284
Product Length/Depth
12.43 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 4X
Protection
Fusible
Application
Solar
System voltage
1000 VDC
Voltage rating
1000 VDC
Series
DC photovoltaic applications
Enclosure
NEMA 4X
Enclosure material
316 stainless steel
Fuse configuration
Fusible
Switch type
Heavy duty
Protection
Fusible
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - DCU2105FXM
Selling Policy 25-000 - Distribution and Control Products and Services
Feature 1: Rated 400 A and two circuits. Business impact: supports high-current PV strings and simplifies multi-string switching in a single enclosure. Application: utility-scale and industrial solar installations where space and routing matter. Feature 2: 1000 VDC maximum, enabling direct integration with modern PV arrays and inverters. Business impact: reduces complexity and cost by eliminating intermediate disconnects. Application: 1000 VDC solar networks in rooftop and ground-mounted systems. Feature 3: NEMA 4X enclosure with 316 stainless steel. Business impact: excellent outdoor durability and corrosion resistance, lowering maintenance costs. Application: rooftop enclosures, outdoor substations, and harsh environments. Feature 4: Fusible protection and heavy-duty switch design. Business impact: fast fault isolation and enhanced safety with predictable trip characteristics. Application: PV systems requiring compliant, fuse-protected DC disconnects. Feature 5: UL Listed certification. Business impact: simplifies procurement and regulatory alignment across industries. Application: any industrial facility prioritizing safety compliance and reliable protection.
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FAQs
Installing the DCU2105FXM in a PV array requires securing the unit to a sturdy surface within the approved enclosure footprint, ensuring proper clearance for cable entries and fuse access. Use compatible lugs and connectors rated for 1000 VDC, route control and protection conductors per local codes, and verify two circuit connections are correctly wired for fusible protection. Proper lockout/tagout is recommended to maintain safe maintenance practices.
Key specs include a 400 A amperage rating, 1000 VDC maximum voltage, two circuits, fusible protection, and a NEMA 4X enclosure. The device is UL Listed and designed for heavy-duty DC disconnect in solar PV systems, enabling reliable isolation of high-current DC circuits in outdoor environments.
Yes. The DCU2105FXM uses a 316 stainless steel enclosure rated for NEMA 4X, which provides robust protection against dust, water, and corrosion. This makes it well-suited for rooftop and outdoor solar installations where weather resistance and long-term durability are essential, while maintaining safe, accessible disconnect functionality.
The DCU2105FXM is UL Listed and enclosed in a NEMA 4X-rated housing, with 316 stainless steel construction. These certifications and ratings attest to reliable performance, safe operation in harsh environments, and regulatory alignment, which simplifies procurement and reduces compliance risk in industrial and solar projects.
Investing in the DCU2105FXM yields measurable value through enhanced safety, reduced downtime from reliable isolation, and long-term durability in outdoor conditions. Its fusible protection, two-circuit design, and UL/NEMA 4X compliance streamline installation, maintenance, and regulatory adherence, contributing to lower lifecycle costs for solar and industrial electrical protection.