<h2>Overview</h2>
<p>The <strong>Bussmann FRN-R-600</strong> is an industrial-grade Class RK5 dual-element, time-delay fuse designed for applications requiring reliable overcurrent protection. Rated at 600A, 250Vac/125Vdc, this cartridge-blade fuse delivers 200 kA interrupting capability at 250Vac and 20 kA at 250Vdc, making it suitable for heavy-load industrial systems including motor control centers, machinery disconnects, and power distribution panelboards.</p>
<h2>Key Features</h2>
<ul>
<li><strong>Dual-Element, Time-Delay Design:</strong> Provides minimum 10-second time delay at 500% rated current for selective coordination and reduced nuisance trips.</li>
<li><strong>Current-Limiting Protection:</strong> Restricts short-circuit current to safe levels, protecting downstream equipment and reducing arc flash hazard.</li>
<li><strong>Class RK5 Rating:</strong> UL-listed for use in branch circuits and motor control circuits with superior interrupting performance.</li>
<li><strong>2:1 Selective Coordination:</strong> Within the Bussmann RK5 Fusetron family, allows upstream fuses to remain intact during load transients.</li>
<li><strong>Non-Indicating Design:</strong> Cartridge blade style, rejection-type connector prevents misinstallation.</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Amperage:</strong> 600A</li>
<li><strong>Voltage Rating:</strong> 250Vac / 125Vdc</li>
<li><strong>Interrupting Rating:</strong> 200 kA at 250Vac RMS Sym; 20 kA at 250Vdc</li>
<li><strong>Fuse Type:</strong> Dual-element, time-delay, current-limiting</li>
<li><strong>Class:</strong> RK5</li>
<li><strong>Physical Dimensions:</strong> 2.88" diameter × 10.38" length</li>
<li><strong>Connection Type:</strong> Blade (rejection-type cartridge)</li>
<li><strong>Time-Delay Response:</strong> Minimum 10 seconds at 500% rated current</li>
<li><strong>Certifications:</strong> UL, CSA, CE</li>
<li><strong>Manufacturer:</strong> Eaton Bussmann Division</li>
</ul>
<h2>Typical Applications</h2>
<p>The FRN-R-600 is commonly deployed in:</p>
<ul>
<li>Motor control centers and combination motor starters</li>
<li>Industrial machinery disconnects and branch circuits</li>
<li>Power distribution panelboards in manufacturing facilities</li>
<li>HVAC systems and heavy industrial equipment</li>
<li>Three-phase motor protection circuits requiring selective coordination</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Bussmann RK5 Fusetron fuse family (all 70A–600A ratings)</li>
<li>Standard Class RK5 rejection-type fuse holders</li>
<li>Motor control centers accepting cartridge blade fuses</li>
<li>Industrial equipment rated for 250V/600V systems</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>Littelfuse FLNR-600 (Class RK5, 600A, 250V)</li>
<li>Mersen TR-R-600 (equivalent Class RK5 fuse)</li>
</ul>
<h3>Works With</h3>
<ul>
<li>Eaton PowerXL and IEC motor control systems</li>
<li>Siemens SIRIUS motor starters and combination units</li>
<li>Allen-Bradley combination starters</li>
<li>General-purpose industrial disconnect switches and panelboards</li>
</ul>
