TR250R - 250 Amp Fuse

TR250R - 250 Amp Fuse

Protecting a high-current electrical system takes more than a fuse with the right amperage printed on its label. Motors draw extra current at startup, transformers can produce significant inrush current when energized, and electrical distribution equipment needs your dependable protection against overloads and short circuits. The Mersen TR250R 250 Amp Class RK5 Time-Delay Fuse is designed to meet these challenges in compatible industrial and commercial electrical systems. Part of Mersen's trusted Tri-Onic® TR-R series, this current-limiting fuse combines a 250A current rating, 250VAC and 250VDC voltage ratings, and time-delay performance in a blade-style configuration.

Key Features and Benefits

• 250-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 and Transformer Protection
• Electrical Distribution Applications

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: TR250R
  
• Product Description: Fuse TR-R – Class RK5 – Time-Delay – 250VAC – 250VDC – 250A – Blade – Tri-Onic®
  
• Product Family: Tri-Onic®
  
• Series: TR-R
  
• Product Type: Current-Limiting Time-Delay Fuse
  
• Fuse Class: Class RK5
  
• Ampere Rating: 250A
  
• 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: 782001748128
  

Material Compliance and Certifications

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

Where It Works Best

• Industrial electric motor circuits requiring a 250A Class RK5 time-delay fuse
• Transformer primary protection applications with appropriate inrush-current requirements
• Commercial and industrial electrical distribution systems
• Electrical feeders requiring specified Class RK5 protection
• Branch circuits designed for a 250A time-delay fuse
• Motor control equipment with compatible blade-type fuse clips
• Electrical systems where normal startup current could cause nuisance operation of an unsuitable fast-acting fuse
• Maintenance and replacement applications requiring Mersen TR250R specifications