<h2>Overview</h2>
<p>The <strong>Bussmann 263-R Class R fuse reducer</strong> is a non-indicating fuse adapter designed to allow smaller Class R fuses to be installed in larger fuse blocks. Each reducer pair enables 30A fuses to fit safely into 60A fuse block openings at 250V. <cite index=”1-1,1-3,1-4″>Fuse reducers allow a smaller size fuse to be installed in a fuse block intended for a larger fuse. A 30 A fuse is two inches long and will not fit into a 60 A fuse block (which is three inches between clips). A number 263 reducer installed on the fuse permits it to be installed in a 60 A fuse block.</cite></p>
<h2>Key Features</h2>
<ul>
<li><cite index=”1-7″>Designed for rejection (Class R) fuse blocks</cite></li>
<li>Non-indicating design for straightforward installation</li>
<li><cite index=”8-5″>Fit into most panels or switches including dead front type</cite></li>
<li><cite index=”8-5″>Strong contact maintained both mechanically and electrically</cite></li>
<li><cite index=”1-5,1-6″>Particularly useful when equipment is being converted. Proper protection can be maintained without the expense of replacing the fuse block.</cite></li>
<li>UL (E12853) and CSA (47235) certified</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Fuse Class:</strong> Class R</li>
<li><strong>Fuse Size:</strong> Up to 30A (reduces to fit 60A blocks)</li>
<li><strong>Rated Voltage:</strong> 250 VAC</li>
<li><strong>Type:</strong> Non-Indicating</li>
<li><strong>Mounting:</strong> Clip-on (ferrule-style)</li>
<li><strong>Quantity Per Carton:</strong> 10 pairs</li>
<li><strong>Material:</strong> PVC</li>
<li><strong>Approvals:</strong> UL, CSA, RoHS Compliant</li>
</ul>
<h2>Typical Applications</h2>
<p><cite index=”5-2″>Fuse reducers install on fuse ferrules or blades to permit the application of smaller size fuses than those for which the fuse blocks or holders are designed.</cite> Common uses include:</p>
<ul>
<li>Equipment retrofit and conversion without fuse block replacement</li>
<li>Industrial electrical panels and distribution boards</li>
<li>Commercial HVAC and machinery protection</li>
<li>Motor control circuits requiring step-down protection</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Class R (rejection) fuse blocks and holders</li>
<li>FRN-R, LPN-RK, FRS-R, LPS-RK, KTN-R, and KTS-R fuse types</li>
<li>Industrial control panels and dead-front switchgear</li>
<li>250V single-phase and three-phase electrical systems</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>Bussmann NO.263-R original equipment</li>
<li>Generic Class R 30A–60A reducers of equivalent rating</li>
</ul>
<h3>Works With</h3>
<ul>
<li>All standard Class R fuse block designs</li>
<li>Bussmann series fuse covers, pullers, and testers</li>
<li>Eaton electrical distribution products</li>
</ul>
