ECSR70 - 70Amp Fuse

ECSR70 - 70Amp Fuse

When electrical systems step up into higher amperage demands, reliable protection becomes even more important—and that’s exactly where the Eaton ECSR70 earns its place. This 70 Amp Class RK5 dual-element time-delay fuse is designed to protect motors, transformers, feeders, and branch circuits from damaging overloads and short-circuit events while still allowing temporary inrush currents during normal equipment startup. In real-world use, that means fewer nuisance interruptions when equipment powers up, and dependable protection when something actually goes wrong.

Built for demanding commercial and industrial environments, the ECSR70 is rated for 600 volts AC and features a high 200kA interrupting capacity, giving it the strength to safely handle severe fault conditions in modern power distribution systems. Its dual-element construction separates short-term harmless overloads from true fault events, helping extend equipment life while maintaining fast fault response when it’s needed most. Whether you’re replacing an existing fuse in a control system or building out a new electrical installation, the ECSR70 delivers the consistent performance professionals expect from Eaton’s ECSR series.

Key Features and Benefits

• 70 Amp Class RK5 dual-element time-delay fuse for commercial and industrial applications
• Helps prevent nuisance blowing during motor startup and temporary inrush conditions
• Protects motors, transformers, feeders, and branch circuits from overloads and short circuits
• Rated for 600 VAC electrical systems
• High 200kA interrupting capacity (kAIC) for dependable fault protection in demanding environments
• Dual-element design balances time-delay performance with fast short-circuit response
• One-time fuse construction for reliable protection during fault conditions
• Compatible with standard Class RK5 fuse holders and disconnect switches
• Ideal for electrical maintenance, upgrades, and new system installations
• Eaton-engineered quality for long-term reliability in industrial environments

Technical Specifications

• Catalog Number: ECSR70
  
• Manufacturer: Eaton (Edison Series)
  
• Product Type: Fuse
  
• Class: RK5
  
• Amperage Rating: 70 Amps
  
• Voltage Rating: 600 VAC
  
• Interrupt Rating: 200 kAIC
  
• Element Type: Dual-element
  
• Response Time: 10 seconds at 500% overload
  
• Fuse Indicator: Non-indicating
  
• Special Feature: One-time fuse
  
• Packaging Type: Standard
  
• Dimensions: 7.88 in (L) × 1.11 in (W) × 1.11 in (H)
  
• Weight: 0.38 lb
  
• UPC: 782634508403
  

Material Compliance and Certifications

The Eaton ECSR70 is CE Marked, indicating compliance with recognized international safety standards for electrical protection devices. It is intended for installation by qualified electrical professionals and should be used in accordance with applicable electrical codes and manufacturer recommendations.

Where It Works Best

The ECSR70 is commonly used in electrical systems where higher amperage protection is required without sacrificing coordination or reliability, including:

• Motor control centers (MCCs)
• Industrial control panels
• Motor branch circuits
• Transformer protection applications
• Feeder and distribution circuits
• HVAC systems in commercial buildings
• Manufacturing and processing facilities
• OEM electrical equipment
• Power distribution equipment requiring RK5 coordination
• Replacement of existing Class RK5 fuses in service environments