FLSR040-ID - 40Amp Fuse

FLSR040-ID - 40Amp Fuse

When your circuit needs reliable protection while also handling normal startup current, the FLSR040-ID 40A fuse is built for the job. This Class RK5 dual-element, time-delay fuse is rated for 600VAC and 300VDC and combines overload protection with high-capacity short-circuit protection. Because it has a time-delay opening characteristic, the FLSR040-ID can tolerate temporary inrush currents during normal equipment startup while still responding to an actual overload or fault. It also takes some of the guesswork out of maintenance.

Key Features and Benefits

• 40A continuous rating for circuits requiring 40-amp overcurrent protection.
• Rated for applications up to 600VAC or 300VDC.
• Class RK5, dual-element construction combines time-delay operation with current-limiting protection.
• Handles normal, temporary inrush currents without opening unnecessarily.
• The built-in blown-fuse indication makes it easier to spot an open fuse during troubleshooting.
• Cartridge-style construction works with the appropriate fuse block, clip, or holder.
• A useful choice where reducing troubleshooting time and equipment downtime matters.
  

Technical Specifications

• Catalog Number: FLSR040-ID / FLSR040ID
  
• Series: FLSR_ID
  
• Fuse Type: Dual-Element Time-Delay Fuse
  
• Fuse Class: Class RK5
  
• Current Rating: 40A
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• Opening Characteristic: Slo-Blo / Time Lag / Time Delay
  
• AC Interrupting Rating: 200,000A RMS symmetrical
  
• Additional AC Interrupting Rating: 300,000A RMS symmetrical, manufacturer self-certified
  
• DC Interrupting Rating: 20,000A at 300VDC
  
• Indicating: Yes
  
• Construction: Industrial Cartridge
  
• Mounting: Fuse Block / Clip / Holder
  
• Compatible Holder Series: LFR60060 Series
  

Material Compliance and Certifications

The FLSR040-ID is a UL Class RK5 fuse designed to meet the performance requirements of this fuse class. Manufacturer information indicates that the FLSR_ID series meets the UL 248-12 Class RK5 requirements and has applicable UL and CSA approvals.

Material-compliance requirements can vary considerably from one project or facility to another. If your application specifically requires documentation for RoHS, REACH, lead-free, halogen-free, or another environmental standard, confirm the current compliance documentation for the exact FLSR040-ID catalog number before installation.

Where It Works Best

The FLSR040-ID makes sense in applications where equipment may briefly draw higher current at startup, but the circuit still needs reliable protection against sustained overloads and short circuits. That combination makes this 40A time-delay fuse particularly useful around motors and motor branch circuits, motor control centers, transformers, switchboard mains and feeders, service entrance switches, and general-purpose industrial circuits.