FLSR17.5-ID - 17½ Amp Fuse

FLSR17.5-ID - 17½ Amp Fuse

Upgrade your protection strategy with the Littelfuse FLSR17.5ID 17½ Amp 600 V Time‑Delay Class RK5 Indicating Fuse. Designed for demanding industrial and commercial systems, this dual‑element cartridge fuse delivers high performance, built‑in visual status indication, and high fault‑interruption capacity. Whether you’re covering motor control centers, HVAC units, or panel‑board feeders, the FLSR17.5ID gives your operation the kind of trustworthy protection that keeps equipment safe and downtime low.

Key Features and Benefits

• Dual‑Element Time‑Delay Design: Combines the advantages of a slow‑blow (time‑delay) element with current‑limiting functionality. This means the fuse tolerates harmless surges (such as motor starts) yet swiftly responds to short‑circuit events—helping protect both short‑term and sustained overload conditions.
• Built‑In Visual Indicator: The “ID” version features a visual window that clearly shows when the fuse has operated (blown). Quick, on‑the‑spot diagnostics save time, reduce service calls, and eliminate the guesswork of maintenance inspection.
• High Interrupt Rating: With interrupt ratings of approximately 200,000 A at 600 V AC and 20,000 A at 300 V DC, the FLSR17.5ID is engineered to manage high fault currents and provide real protection in serious fault events.
• Cartridge Construction & Compact Size: The cylindrical, cartridge‑style fuse fits standard Class RK5 holders and fuse blocks—making installation straightforward and replacement efficient.
• Operational Efficiency & Lower Maintenance Costs: Because the unit enables faster diagnosis (via visual indication) and a high level of fault management, it helps reduce unplanned downtime, limit equipment damage, and ultimately lower your service and replacement expenses over time.

Technical Specifications

• Continuous Current Rating: 17.5 Amps
• Voltage Rating: 600 V AC / 300 V DC
• Interrupting Rating:
  • ~200,000 A at 600 V AC
  • ~20,000 A at 300 V DC
• Fuse Class & Family: Class RK5, FLSR_ID Series (indicating)
• Style / Construction: Dual‑element time‑delay cartridge fuse with visual indicator window
• Size: Approximately 13/16″ diameter × 5″ length (for 17.5 A version)

Material Compliance and Certifications

• UL Listed to UL 248‑12 (Class RK5)
• CSA Certified (File No. LR29862)
• RoHS‑compliant and manufactured using conscientious processes and materials to support modern environmental standards.
• Patented visual‑indication design supports enhanced safety, improved fault visibility, and quicker maintenance workflows.

Where It Works Best

• Motor control centers (MCCs) and branch circuits driving pumps, compressors or conveyors
• HVAC and refrigeration systems where inrush currents are present, and reliability is essential
• Electrical distribution panels and feeders in manufacturing plants, processing facilities, or heavy‑duty equipment installations
• Switchboard mains or feeders where fault‑current potential is high and a fast indication of fuse status helps keep operations running