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ECSR300 - 300Amp Fuse
ECSR300 - 300Amp Fuse
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ECSR300 - 300Amp Fuse
The ECSR300 Eaton Edison fuse is a 300-amp Class RK5 dual-element fuse used in heavier electrical systems where you need protection that can keep up with real load conditions. It’s commonly found in industrial distribution panels, large motor circuits, and feeder applications, basically anywhere you’ve got steady demand and still need solid fault protection behind it.
What makes this fuse practical in the field is how it deals with everyday electrical behavior. Large motors and transformers don’t always start clean—they pull a short burst of higher current when they energize. The dual-element, time-delay design gives the ECSR300 enough tolerance to ride through those normal startup spikes without blowing. But when there’s an actual overload or short circuit, it clears the fault quickly and helps protect the rest of the system from damage.
Key Features and Benefits
- 300A Class RK5 dual-element fuse for heavy-duty electrical systems
- 600V rating for commercial and industrial power distribution
- Time-delay design helps handle normal motor and transformer inrush
- 200kA interrupt rating for high fault current protection
- Dual-element construction improves system coordination
- Finger-safe design for safer handling in tight panels
- Fits standard RK5 fuse blocks and holders
Technical Specifications
- Catalog Number: ECSR300
- Product Type: Fuse
- Class: RK5
- Amperage Rating: 300A
- Voltage Rating: 600V AC
- Interrupt Rating: 200 kAIC
- Element Type: Dual-element
- Response Time: 10 sec at 500% overload
- Fuse Indicator: Non-indicating
- Special Features: Finger-safe construction
- Dimensions: 5.5 in (L) x 1.6 in (W) x 1.06 in (H)
- Weight: 0.5 lb
- Packaging Type: Standard
Material Compliance and Certifications
The ECSR300 Eaton Edison fuse is CE marked, meaning it meets recognized safety and performance standards for electrical protection devices.
Where It Works Best
- Industrial power distribution systems
- Large motor control centers (MCCs)
- Feeder circuit protection
- Transformer protection applications
- Heavy HVAC and motor loads
- Coordinated protection systems using RK5 fuse blocks
- Commercial facilities with higher load demand
- Electrical systems where uptime matters
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