Fuse Tri-Onic® 250V 3A Time-Delay Class RK5 TR Series – Electrical Protection Fuse

The Fuse Tri-Onic® 250V 3A 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. Designed with time-delay characteristics, this fuse safely handles harmless starting and inrush currents typical in motors and transformers. It is suitable for electrical distributors and switchgear suppliers seeking reliable protection solutions for general-purpose equipment.

Specifications

• Manufacturer: Mersen
• Manufacturer Part #: TR3R
• Voltage Rating: 250 V AC
• Amperage Rating: 3 A
• Fuse Class: Class RK5
• Interrupt Rating: 200 kA
• Frequency: 50 hertz
• Connection Type: Ferrule
• Mounting Type: Clip
• Dimensions: Length 2 in, Diameter 0.56 in, Width 0.56 in, Height 0.56 in
• Product Weight: 0.0370 lbs
• Insulation Material: PolyTube

Features

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

Downloads & Links

• Spec Sheet
• Curves
• Drawings