ECSR125 - 125Amp Fuse

ECSR125 - 125Amp Fuse

Electrical systems don’t run at a perfectly steady pace. Throughout the day, motors start up, compressors cycle, HVAC equipment kicks in, and various loads come online. These normal operating changes create short bursts of current that can look like a fault—but aren’t. The Eaton Edison ECSR125 Fuse is designed specifically to handle those real-world conditions without unnecessary interruptions.

This 125 Amp Class RK5 dual-element time-delay fuse is built to let equipment start up and stabilize without tripping unnecessarily. Instead of reacting to harmless inrush current, it gives your system the space it needs to operate normally. When an actual overload or fault occurs, it responds appropriately to help protect wiring, equipment, and downstream components.

With a 600V rating and a 200 kAIC interrupting capacity, the ECSR125 is commonly used in commercial and industrial electrical systems where dependable protection is expected. You’ll often find it in motor control centers, HVAC systems, OEM machinery, automation panels, and power distribution setups.

Key Features and Benefits

• 125 Amp Class RK5 time-delay fuse for commercial and industrial applications
• Super lag design helps manage short-duration inrush current during equipment startup
• Helps reduce nuisance fuse openings from normal load cycling
• 600V rating suitable for a wide range of electrical systems
• 200 kAIC interrupt rating for dependable fault protection capability
• Dual-element construction supports controlled time-delay performance
• Commonly used in HVAC, motor control centers, and OEM equipment
• Helps improve uptime by minimizing unnecessary interruptions
• Non-indicating design for straightforward field replacement

Technical Specifications

• Manufacturer: Eaton
• Series: Edison ECSR
• Catalog Number: ECSR125
• Product Type: Fuse
• Fuse Class: RK5
• Amperage Rating: 125 A
• Voltage Rating: 600 V
• Interrupt Rating: 200 kAIC
• Response Time: 10 seconds at 500% overload
• Special Features: Super lag, time lag, non-current limiting
• Number of Elements: Dual-element
• Fuse Indicator: Non-indicating
• Packaging Type: Standard
• Dimensions: 5 in L × 0.81 in W × 0.81 in H
• Weight: 0.4 lb
• Compliance: CE Marked

Material Compliance and Certifications

The ECSR125 is CE Marked and manufactured under Eaton’s established quality standards. It is intended for use in properly rated electrical systems and should be installed according to applicable electrical codes and installation practices.

Where It Works Best

• Motor control centers (MCCs)
• HVAC and refrigeration systems
• Industrial automation equipment
• OEM machinery and production systems
• Electrical distribution panels
• Pump and compressor systems
• Commercial and light industrial circuits
• Facility power distribution setups

When you need circuit protection that doesn’t overreact to normal startup conditions, the ECSR125 fits in cleanly and supports steady, predictable system operation.