Eaton 8CLS-6R Fuse - 50 kAIC, 7.2 kV Class R Motor Protection
Part Number: 8CLS-6R
Quick Summary
The Eaton Bussmann CLS fuse 8CLS-6R provides reliable motor-start protection for industrial power circuits. This single-barrel, 6R-design fuse helps prevent nuisance trips during motor startup while safeguarding downstream equipment. Note that the datasheet lists Compliances as 'Contact Manufacturer' and Certifications as 'Not Applicable'—verify SIL, CE, and IP ratings with Eaton for your specific regulatory needs. In practice, this device supports compact installation in control panels and motor starter assemblies, delivering robust protection without unnecessary panel footprint. By aligning with CLS family characteristics, it also enhances overall reliability, reduces maintenance interventions, and supports efficient project timelines in industrial automation and electrical protection deployments.
Product Information
Extended Description
8CLS-6R Eaton: Eaton Bussmann series 8CLS fuse, Single barrel, 6R designation, 170A, 50 kAIC, Motor start, CLS
Product Name
Eaton Bussmann series CLS fuse
Catalog Number
8CLS-6R
UPC
051712530910
Product Length/Depth
15.9 in
Product Height
3 in
Product Width
3 in
Product Weight
9 lb
Warranty
Not Applicable
Compliances
Contact Manufacturer
Certifications
Not Applicable
Amperage Rating
170 A
Interrupt rating
50 kAIC
Voltage rating
7.2 kV
Barrels
1
Class
Class R
Special features
Single barrel, 6R designation
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - 8CLS-6R
Feature: Amperage Rating of 170 A — Business Impact: Provides precise overcurrent protection for medium-to-large motor loads, reducing the risk of overheating and equipment damage. Application: Suitable for motor starters and protective assemblies in manufacturing lines. Feature: Interrupt Rating of 50 kAIC — Business Impact: Fast, high-energy fault clearing minimizes collateral damage and downtime during faults. Application: Critical in high-short-circuit environments and main distribution panels. Feature: Voltage Rating of 7.2 kV — Business Impact: Enables safe operation in higher voltage motor circuits, expanding compatibility with industrial feeders. Application: Control panels and motor control centers requiring high-voltage protection. Feature: Class R, Single Barrel, 1 Barrel — Business Impact: Compact form factor reduces panel space, simplifies replacement, and lowers installation time. Application: Standard Bussmann CLS installations in existing fuse blocks. Feature: 6R Designation with Mounting Convenience — Business Impact: Cleared organization and reliable retention in tight spaces; eases serviceability. Application: Enclosures with limited depth and standard fuse blocks. Feature: Motor Start Emphasis — Business Impact: Optimized to handle inrush associated with motor startups, improving uptime. Application: Industrial drives and conveyors in automation lines. The combination of these features supports compliance with electrical protection standards while delivering measurable efficiency gains, reduced downtime, and predictable maintenance cycles.
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FAQs
The 8CLS-6R is a single-barrel CLS fuse with a 170 A rating and 7.2 kV capacity, designed for motor-start protection. Install in standard fuse blocks within motor control centers, ensuring proper clearance, secure mounting, and alignment with the control panel’s conductor sizes. Verify that the enclosure accommodates a 15.9 inch length device and follow manufacturer torque specs for termination lugs to maintain reliable protection and prevent arcing.
Key specifications include an amperage rating of 170 A, an interrupt rating of 50 kAIC, and a voltage rating of 7.2 kV. The fuse is designated as single-barrel with a Class R designation, and it is intended for motor-start protection. These ratings ensure robust short-circuit handling while allowing safe operation in moderate to high-energy motor circuits, reducing the risk of equipment damage and downtime.
Yes, the 8CLS-6R is specified for motor-start protection, which makes it suitable for environments with significant inrush currents. Its 50 kAIC interrupt rating helps rapidly clear faults, minimizing stress on feeders and equipment. Ensure the load profile matches the amperage rating and that the fuse is installed in an appropriate enclosure with adequate cooling and clearance to sustain repeated motor starts.
The datasheet lists Compliances as 'Contact Manufacturer' and Certifications as 'Not Applicable,' so certification details are not provided here. For regulated environments, contact Eaton to confirm SIL, CE, IP ratings, and any regional approvals required for your installation. Verification is essential to meet specific safety and regulatory requirements in your facility.
Maintenance considerations focus on periodic inspection of fuse condition and ensuring compatibility with CLS-series replacement parts. The 8CLS-6R’s robust 170 A rating and 50 kAIC interrupt capability help reduce downtime from faults and simplify procurement through standard Bussmann CLS family parts. Expected ROI stems from improved motor protection, fewer nuisance trips, and streamlined spares management in control panels and motor drives.