TR300R - 300 Amp Fuse

TR300R - 300 Amp Fuse

A motor pulling extra current at startup isn't necessarily a problem. Neither is the brief surge that occurs when you energize a transformer. These are normal parts of operating electrical equipment, but they can create headaches when the wrong fuse is installed.

That's where the Mersen TR300R 300 Amp Class RK5 Time-Delay Fuse comes in. As part of the Tri-Onic® TR-R series, this current-limiting fuse is designed to handle short-duration starting and inrush currents while protecting compatible electrical circuits from overloads and short circuits.

Key Features and Benefits

• 300-Amp Current Rating
• Class RK5 Fuse Classification
• Tri-Onic® TR-R Series
• Time-Delay Protection
• Current-Limiting Design
• Tin-Plated Copper Blade Terminals
• Clip-Mounted Installation
• PolyTube Insulating Body
• 50/60 Hz Frequency Rating
  
• Motor Starting Current Accommodation
• Transformer Inrush Current Accommodation
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: TR300R
  
• Product Family: Tri-Onic®
  
• Series: TR-R
  
• Product Type: Current-Limiting Time-Delay Fuse
  
• Fuse Class: Class RK5
  
• Ampere Rating: 300A
  
• Rated AC Voltage (UL): 250VAC
  
• Rated DC Voltage (UL): 250VDC
  
• AC/DC Compatibility: AC and DC, within applicable ratings
  
• Frequency: 50/60 Hz
  
• Speed / Operating Characteristic: Time Delay
  
• AC Maximum Interrupting Rating / Breaking Capacity (I1): 200kA (200,000A)**
• Mounting Type:** Clip
  
• Terminal / Connection Type: Blade
  
• Terminal Material: Tin-Plated Copper
  
• Body / Insulating Material: PolyTube
  
• Product Diameter: 52.4 mm (approximately 2.06 inches)
  
• Product Length: 219.2 mm (approximately 8.63 inches)
  
• Individual Product Weight: 0.7439 kg (approximately 1.64 lbs.)
  
• RoHS Compliant: Yes
  
• Product Group: Low Voltage UL/CSA Fuses
  
• EAN/UPC Code: 782001748135
  

Material Compliance and Certifications

• RoHS Compliance
• Manufacturer-Published UL Voltage Ratings
  • AC Voltage Rating: 250VAC
  • DC Voltage Rating: 250VDC

Where It Works Best

• Industrial Motor Protection
• Large Motor Starter Circuits
• Transformer Primary Protection
• Transformer Inrush Applications
• Commercial Electrical Distribution Systems
• Industrial Electrical Distribution Systems
• Compatible Service Entrance Equipment
• Motor Control Equipment
• High-Current Electrical Assemblies
• Class RK5 Time-Delay Fuse Applications
• Blade-Type Fuse Holders
• Clip-Mounted Fuse Assemblies
• Industrial Equipment Maintenance
• Electrical System Repairs
• Compatible Fuse Replacement Applications