Mersen TR50R Fuse Tri-Onic Time-Delay 250V 50A Class RK5, 3 Inch Length, Copper Terminal

Description

Features

• Engineered with Mersen s Tri-Onic time-delay technology, this fuse is specifically designed to carry 500% of its rated current for at least 10 seconds. This prevents frustrating nuisance tripping caused by high inrush currents during heavy-duty motor or transformer startups, keeping your industrial machinery operational without compromising on sensitive overload protection.
• With a massive 250V AC interrupting rating of 200,000 Amps, this current-limiting fuse rapidly clears high-magnitude short circuits before they can reach downstream equipment. This high-tier Short Circuit Current Rating (SCCR) ensures your electrical distribution system remains safe and compliant, significantly reducing the risk of catastrophic arc flash events or permanent damage to your switchgear.
• Featuring a standardized Class RK5 rejection-style blade, this 50-Amp cartridge fuse is built to fit into any modern 250V rejection-style fuse holder. The physical design prevents the accidental installation of lower-rated Class H or K fuses, ensuring your commercial power system maintains its intended current-limiting safety margins and stays strictly code-compliant during routine maintenance.
• As a specialized current-limiting component, the TR50R clears faults so quickly that it limits the total thermal energy (I^2t) let-through to your circuit. This proactive protection shields cables, controllers, and expensive industrial drives from the destructive forces of a short circuit, extending the lifespan of your infrastructure and lowering long-term repair costs.

Documentation & Downloads

Specifications