FLNR175-ID - 175 Amp Fuse

FLNR175-ID - 175 Amp Fuse

The Littelfuse FLNR175‑ID is a high‑performance 175 amp, Class RK5 indicating fuse designed for industrial and commercial environments where downtime isn’t an option. With knife‑blade terminals and time‑delay (Slo‑Blo) operation, it’s engineered to handle heavy inrush currents from motors and large transformers without nuisance blowing. Rated for 250 V AC and 125 V DC, and tested to interrupt fault currents up to 300 kA AC and 20 kA DC, this fuse gives you serious peace of mind when protection and uptime really matter. Plus, the built‑in visual indication lets you immediately identify a blown fuse, helping streamline maintenance and reduce service costs.

Key Features and Benefits

• Visual Indication Feature: The integrated indicator lets you instantly see when the fuse has blown, enabling quicker diagnostics and less downtime.
• Time‑Delay (Slo‑Blo) Performance: Designed to tolerate motor and transformer start‑up inrush currents, helping avoid unintended trips in demanding industrial circuits.
• High Fault‑Current Interrupting Capacity: Capable of interrupting up to 300,000 A AC and 20,000 A DC, giving you a wide margin of safety for heavy‑duty systems.
• Knife‑Blade Terminal Construction: Ensures secure, vibration‑resistant connections—ideal for rugged industrial and commercial installations.
• Dual‑Element Design: Offers both overload and short‑circuit protection in one body to extend equipment life and enhance system reliability.
• Trusted Littelfuse Reputation: Manufactured under rigorous quality standards, so you can count on performance and dependability when it counts.

Technical Specifications

• Catalog Number: FLNR175‑ID
  
• Continuous Current Rating: 175 Amps
  
• Voltage Rating: 250 V AC / 125 V DC
  
• Interrupting Rating: Up to 300 kA AC / 20 kA DC
  
• Fuse Type: Time‑Delay / Slo‑Blo (dual element)
  
• Class: RK5
  
• Terminal Style: Knife‑Blade
  
• Indicating Feature: Yes (Visual indicator built in)
  
• Family: FLNR_ID Series (dual‑element, time delay, indicating fuse)
  

Material Compliance and Certifications

• UL Listed: Meets UL 248‑12 for Class RK5 fuses
  
• CSA Certified: UL equivalent Canadian certification
  
• RoHS Compliant: Meets modern environmental standards
  
• NEC Requirements: Meets the National Electrical Code (NEC) requirements for Class RK5 time‑delay fuses in industrial applications
  

Where It Works Best

• This fuse is your go‑to choice for protecting heavy‑duty systems such as large motors, transformer mains, HVAC systems, or industrial power distribution panels. Whether you’re safeguarding a factory floor, a commercial facility, or infrastructure equipment, the FLNR175‑ID is built to handle severe overload conditions and high fault currents—helping maintain operational uptime, protect your equipment, and reduce maintenance hassles.