ECNR40 - 40 Amp Fuse

ECNR40 - 40 Amp Fuse

When you’re working with electrical systems, especially in commercial or industrial environments, you quickly learn that not every current spike means something is wrong. Equipment like motors, transformers, and HVAC units naturally pull a higher surge of power when they start up. The Eaton Edison ECNR40 Fuse is designed with that in mind.

This 40 Amp Class RK5 dual-element time-delay fuse gives equipment the space it needs to start normally without tripping unnecessarily. Instead of reacting to harmless startup surges, it stays stable during those brief moments of high inrush current. But when a real overload or short circuit happens, it responds quickly to help protect your equipment and wiring from damage.

That balance between flexibility and protection is what makes this fuse so widely used. It’s not just about preventing failures—it’s about keeping systems running without interruption.

With a 200 kAIC interrupt rating, the ECNR40 is built for demanding electrical environments where fault currents can be significant. It’s rated for 250 VAC and 125 VDC systems, making it suitable for a wide range of industrial and commercial applications. Whether it’s installed in a motor control center, distribution panel, HVAC system, or OEM equipment, it delivers consistent protection you can rely on.

Key Features and Benefits

• 40 Amp Class RK5 fuse for commercial and industrial electrical systems
• Dual-element time-delay design helps handle motor and transformer startup surges
• Reduces nuisance openings during normal equipment operation
• High 200 kAIC interrupting rating for strong fault protection
• Rated for 250 VAC and 125 VDC applications
• Helps improve uptime by preventing unnecessary shutdowns
• Suitable for motors, HVAC systems, transformers, and control panels
• Non-indicating design for straightforward replacement
• Designed for dependable performance in real-world operating conditions

Technical Specifications

• Manufacturer: Eaton
  
• Series: Edison ECNR
  
• Catalog Number: ECNR40
  
• UPC: 782634507369
  
• Product Type: Fuse
  
• Fuse Class: RK5
  
• Amperage Rating: 40 A
  
• Voltage Rating: 250 VAC / 125 VDC
  
• Interrupt Rating: 200 kAIC
  
• Response Time: 10 seconds at 500% overload
  
• Number of Elements: Dual-element
  
• Fuse Indicator: Non-indicating
  
• Special Features: Non current limiting
  
• Dimensions: 8.63 in L × 2.38 in W × 2.38 in H
  
• Weight: 1.95 lb
  
• Packaging Type: Standard
  

Material Compliance and Certifications

The Eaton ECNR40 is CE Marked, showing compliance with recognized safety and performance standards. It is manufactured under Eaton’s quality guidelines and intended for use in properly rated electrical systems installed according to applicable electrical codes.

Where It Works Best

The ECNR40 is a solid fit anywhere electrical loads fluctuate during normal operation. You’ll typically see it used in:

• Motor control centers and motor circuits
• HVAC and refrigeration systems
• Industrial machinery and production equipment
• Transformers and inductive load applications
• Commercial electrical distribution systems
• Pump and compressor systems
• OEM equipment and control panels
• Maintenance and replacement of RK5 fuse systems

If your system deals with startup surges but still needs dependable fault protection, the Eaton Edison ECNR40 delivers a practical, reliable solution that helps keep everything running the way it should.