FLNR250-ID - 250Amp Fuse

FLNR250-ID - 250Amp Fuse

Designed specifically for heavy industrial use, this knife‑blade style fuse incorporates a dual‑element time‑delay mechanism to handle surges from large motors and transformer inrush currents—without constantly nuisance‑tripping. Rated for up to 250 V AC (and 125 V DC) with a massive interrupting capacity of 300,000 A AC and 20,000 A DC, it meets Class RK5 performance standards and delivers dependable uptime in demanding environments. Whether you’re powering large motors, high‑capacity transformers, or heavy‑duty control systems, this fuse offers a clear visible indication of when it has operated—making maintenance faster and more straightforward.

Key Features and Benefits

• Time‑Delay Protection: Built to handle motor starts and transformer inrush without unnecessary fuse blows.
• High Interrupting Capacity: Offers 300,000 A AC and 20,000 A DC fault‑clearing capacity for strong system protection.
• Knife‑Blade Terminals: Heavy‑duty construction ensures secure connections in industrial panels.
• Built‑In Indicating Feature: Quick visual confirmation when the fuse has operated, reducing inspection time.
• Dual‑Element Design: Combines short‑circuit and overload protection in one compact component.
• UL Class RK5 Certification: Meets rigorous safety and performance standards for industrial applications.
• Industrial‑Grade Durability: Intended for the toughest operating conditions, keeping systems online when others fail.

Technical Specifications

• Current Rating: 250 Amps
  
• Voltage Rating (AC): 250 Volts
  
• Voltage Rating (DC): 125 Volts
  
• Interrupting Rating (AC): 300,000 Amps
  
• Interrupting Rating (DC): 20,000 Amps
  
• Opening Characteristic: Time‑Delay (Slo‑Blo)
  
• Fuse Class: RK5
  
• Indicating Feature: Yes
  
• Construction Style: Knife‑Blade
  
• Family: FLNR_ID Series (225–400 A range)
  

Material Compliance and Certifications

• UL Listed: meets strict safety standard benchmarks
• CSA Certified: certified for Canadian safety compliance
• RoHS Compliant: manufactured using environmentally responsible materials
• Regulatory Compliance: engineered to exceed industry safety regulations and deliver trustworthy protection

Where It Works Best

• Large industrial motors with high start‑up torque
• High‑capacity transformers in commercial or manufacturing plants
• Heavy‑duty power distribution panels that feed multiple loads
• Industrial control systems in manufacturing, processing, or energy‑infrastructure operations
• HVAC systems and large‑scale energy infrastructure projects need dependable protection