ECNR350 - 350Amp Fuse

ECNR350 - 350Amp Fuse

When you're dealing with higher-capacity electrical systems, protection needs to be steady, predictable, and built for real operating conditions—not just ideal ones. The Eaton Edison ECNR350 Fuse is a 350 Amp Class RK5 dual-element time-delay fuse designed for exactly that kind of environment. It’s commonly used in commercial and industrial power systems where large motors, transformers, and heavy electrical loads create both steady operating demand and occasional startup surges.

Instead of reacting to those normal startup surges, the ECNR350 is designed to ride through them. That means motors and equipment can start up as expected without causing unnecessary fuse openings. When a true overload or short-circuit condition occurs, however, the fuse responds quickly to help protect downstream equipment and reduce the risk of system damage. It’s this balance—between flexibility during startup and fast protection during faults—that makes RK5 dual-element fuses a trusted choice in demanding electrical systems.

Key Features and Benefits

• 350 Amp Class RK5 fuse for high-capacity electrical systems
• Dual-element time-delay design helps manage motor and transformer inrush currents
• Reduces nuisance fuse openings during normal equipment startup
• High 200 kAIC interrupt rating for strong fault protection in demanding environments
• Rated for 250 VAC and 125 VDC systems
• Helps improve system uptime and reduce unplanned maintenance
• Suitable for industrial, commercial, and heavy-duty electrical applications
• Non-indicating design for straightforward replacement in the field
• Built for consistent performance in high-load environments

Technical Specifications

• Manufacturer: Eaton
  
• Series: Edison ECNR
  
• Catalog Number: ECNR350
  
• UPC: 782634507529
  
• Product Type: Fuse
  
• Fuse Class: RK5
  
• Amperage Rating: 350 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:
  • 2 in L × 0.56 in W × 0.56 in H
• Weight: 0.5 lb
  
• Packaging Type: Standard
  

Material Compliance and Certifications

The Eaton ECNR350 fuse is CE Marked, confirming compliance with applicable international safety and performance standards. It is manufactured under Eaton’s quality requirements for industrial electrical protection products and is intended for use in properly rated electrical systems.

Where It Works Best

The ECNR350 is commonly used in environments where electrical demand is high and systems must remain stable through normal fluctuations in load:

• Motor control centers (MCCs)
• Industrial machinery and manufacturing systems
• HVAC and large mechanical equipment
• Power distribution panels and switchgear
• Transformer and inductive load circuits
• Pumping and compressor systems
• Heavy-duty commercial and industrial facilities
• OEM equipment and system integration projects
• Maintenance and replacement applications requiring a 350A RK5 fuse

For operations where downtime is costly and electrical loads are unpredictable, the Eaton Edison ECNR350 provides dependable protection with the flexibility needed for real-world industrial performance.