ECSR400 - 400Amp Fuse

ECSR400 - 400Amp Fuse

The Eaton ECSR400 is a high-performance 400 Amp Class RK5 dual-element time-delay fuse designed to provide dependable overcurrent protection for commercial and industrial electrical systems. Built to safeguard motors, transformers, feeders, and other critical equipment, this fuse is engineered to handle the temporary inrush currents that occur during motor startup while responding quickly to sustained overloads and short circuits. Whether you're maintaining an existing electrical distribution system or replacing a worn fuse, the ECSR400 delivers the consistent performance and protection professionals expect from Eaton.

Rated for 600 VAC with a 200 kA interrupting capacity (kAIC), the Eaton ECSR400 is well suited for applications where high fault current protection is essential. Its dual-element construction offers an excellent balance of overload tolerance and fast short-circuit protection, while the finger-safe, non-indicating design promotes safer handling during installation and servicing. Manufactured to meet demanding industry standards, this Class RK5 fuse is an excellent choice for facilities that require reliable electrical protection to help extend equipment life and maintain system reliability.

Key Features and Benefits

• Provides dependable protection against overloads and short circuits
• Dual-element time-delay design helps prevent nuisance fuse openings during motor startup
• 400 Amp current rating for heavy-duty commercial and industrial applications
• Rated for 600 VAC electrical systems
• High 200 kA interrupting capacity (kAIC) enhances protection during fault conditions
• Finger-safe construction supports safer installation and maintenance procedures
• Non-indicating Class RK5 fuse design
• Designed for compatibility with standard Class RK5 fuse holders and disconnect switches
• Helps reduce unnecessary downtime by accommodating temporary inrush currents
• Manufactured by Eaton for long-lasting, dependable circuit protection

Technical Specifications

• Manufacturer: Eaton
• Series: Edison ECSR
• Catalog Number: ECSR400
• Product Type: Fuse
• Fuse Class: RK5
• Amperage Rating: 400 Amps
• Voltage Rating: 600 VAC
• Interrupt Rating: 200 kAIC
• Response Time: 10 seconds at 500% overload
• Number of Elements: Dual-element
• Fuse Indicator: Non-indicating
• Special Features: Finger-safe, non-indicating design
• Packaging Type: Standard
• Dimensions: 5.50 in. L × 1.06 in. W × 1.06 in. H
• Weight: 0.50 lb
• UPC: 782634508533

Material Compliance and Certifications

• CE Marked
• Manufactured to meet applicable industry requirements for electrical circuit protection
• Designed for installation in accordance with applicable electrical codes and manufacturer recommendations

Where It Works Best

• Motor control centers (MCCs)
• Industrial control panels
• Motor branch circuits
• Transformers
• Distribution panels and switchgear
• HVAC systems
• Manufacturing facilities
• Processing plants
• Commercial buildings
• OEM equipment
• Electrical maintenance, repair, and replacement projects requiring Class RK5 time-delay fuses