<h2>Overview</h2>
<p>The <strong>Ferraz Shawmut 4YZL3</strong> (manufacturer model TRS15R) is a Class RK5 time-delay cartridge fuse designed for industrial overcurrent protection. With a 15-ampere rating and dual voltage capability—600VAC and 300VDC—this Tri-Onic SmartSpot fuse delivers reliable protection across a wide range of industrial electrical systems. The 200kA interrupt rating ensures safe operation under fault conditions.</p>
<h2>Key Features</h2>
<ul>
<li><strong>Time-Delay Characteristics:</strong> Safely tolerates harmless motor starting and transformer inrush currents without nuisance tripping</li>
<li><strong>Tri-Onic SmartSpot Technology:</strong> Advanced dual-element design for consistent, reliable protection</li>
<li><strong>High Interrupt Rating:</strong> 200kA AC / 20kA DC for superior short-circuit capacity</li>
<li><strong>Polyester Body:</strong> Durable construction with copper contacts for long service life</li>
<li><strong>UL/CSA Certified:</strong> Meets UL 248-12 (File E2137) and CSA C22.2 No. 248.12 standards</li>
<li><strong>Quantity:</strong> Supplied in a convenient bag of 5 units</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Current Rating:</strong> 15 Amperes</li>
<li><strong>Voltage Rating:</strong> 600VAC / 300VDC</li>
<li><strong>Interrupt Rating:</strong> 200kA AC, 20kA DC</li>
<li><strong>Class:</strong> RK5 (Current-Limiting, Time-Delay)</li>
<li><strong>Type:</strong> Cartridge Fuse (Dual-Element)</li>
<li><strong>Body Material:</strong> Polyester</li>
<li><strong>Contact Material:</strong> Copper</li>
<li><strong>Dimensions:</strong> 0.81" Dia × 5" L (20.57 × 127 mm)</li>
<li><strong>Weight (per unit):</strong> 3.2 oz</li>
<li><strong>Standards:</strong> UL 248-12, CSA C22.2 No. 248.12</li>
</ul>
<h2>Typical Applications</h2>
<p>The Ferraz Shawmut TRS-R series is engineered for:</p>
<ul>
<li>Motor circuit protection in industrial machinery and equipment</li>
<li>Transformer protection in distribution systems and control circuits</li>
<li>Service entrance equipment and main distribution panels</li>
<li>Feeder and branch circuit protection in factory automation</li>
<li>Industrial lighting and HVAC systems</li>
<li>Equipment with high inrush current demands requiring time-delay fuses</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Class RK5 fuse holders and cartridge bases (1/10–600A industrial ratings)</li>
<li>Industrial control panels and distribution equipment rated for 600VAC</li>
<li>Motor starters, magnetic contactors, and overload relays requiring Class RK5 protection</li>
<li>DC systems rated for 300VDC nominal operation</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>Ferraz Shawmut TRS15R</li>
<li>Ferraz TR15R (non-R variant)</li>
<li>Any Class RK5, 15A, 600VAC/300VDC time-delay cartridge fuse requiring equivalent ratings</li>
</ul>
<h3>Works With</h3>
<ul>
<li>Industrial motor control systems (IEC 60947-4-1 compliant)</li>
<li>UL 508 industrial control panels</li>
<li>NFPA 70 (National Electrical Code) compliant installations</li>
<li>Dual-voltage AC/DC systems in mining, manufacturing, and utility applications</li>
</ul>
