Fuse Tri-Onic® 250V 25A Time-Delay Class RK5 TR Series – Electrical Protection Fuse

The Fuse Tri-Onic® 250V 25A Time-Delay Class RK5 TR Series by Mersen is engineered for overcurrent protection in motor circuits, mains, feeders, branch circuits, transformers, and service entrance equipment. This current-limiting, time-delay fuse safely handles starting and inrush currents associated with motors and transformers, making it suitable for general-purpose electrical distribution and lighting solutions. It is designed to provide reliable protection in industrial and commercial electrical systems, compatible with recommended fuse blocks for secure mounting and replacement.

Specifications

• Manufacturer: Mersen
• Manufacturer Part #: TR25R
• Voltage Rating: 250V AC
• Amperage Rating: 25 A
• Interrupt Rating: 200 kA
• Fuse Class: Class RK5
• Mounting Type: Clip
• Connection Type: Ferrule
• Frequency: 50 hertz
• Insulation Material: PolyTube
• Dimensions: Length 2 in, Diameter 0.56 in, Width 0.56 in, Height 0.56 in
• Product Weight: 0.0370 lbs

Features

• Time-delay characteristic to handle motor start-ups and transformer inrush currents without nuisance opening
• Current-limiting design for low peak let-thru current
• Rejection-style design prevents replacement errors when used with recommended fuse blocks
• Metal-embossed date and catalog number for traceability and lasting identification
• Fiberglass body provides dimensional stability in harsh industrial environments
• High-grade silica filler ensures fast arc quenching and high current limitation

Downloads & Links

• Curves 2
• Spec Sheet
• Drawings
• Curves 1