FLSR050 - 50Amp Fuse

FLSR050 - 50Amp Fuse

The FLSR050 is a 50A Class RK5 time-delay fuse built for circuits where short bursts of higher current are part of normal operation. Think motor startup or transformer inrush—situations where you don't want a brief, expected surge opening the fuse unnecessarily. This dual-element fuse is rated for 600VAC and 300VDC, providing a useful range for industrial and commercial electrical applications.

Key Features and Benefits

• 50-amp continuous rating for circuits designed around a 50A protective device.
• Rated up to 600VAC and 300VDC.
• Class RK5 current-limiting design helps limit damaging fault current.
• Dual-element construction provides both time-delay operation and overcurrent protection.
• The Slo-Blo / time-delay response allows appropriate temporary startup and inrush currents without unnecessary fuse operation.
• Industrial cartridge format works with the appropriate fuse block, clip, or holder.
• Non-indicating fuse for applications where a built-in blown-fuse indicator isn't needed.
  

Technical Specifications

• Catalog Number: FLSR050
  
• Series: FLSR
  
• Fuse Type: Dual-Element Time-Delay Fuse
  
• Fuse Class: Class RK5
  
• Current Rating: 50A continuous
  
• Maximum AC Voltage: 600VAC
  
• Maximum DC Voltage: 300VDC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• AC Interrupting Rating: 200,000A at 600VAC
  
• Additional Manufacturer-Specified AC Interrupt Amperage: 300,000A at 600VAC
  
• DC Interrupting Rating: 20,000A at 300VDC
  
• Size / Construction: Industrial Cartridge
  
• Family Style: Dual Element Fuse
  
• Indicating: No
  
• Mounting: Fuse Block / Clip / Holder
  
• PG Holder: LFR60060 Series
  

Material Compliance and Certifications

The FLSR050 belongs to the Class RK5 fuse category and is designed for applications requiring the electrical characteristics of that fuse class. Its dual-element construction provides the time-delay behavior needed for loads that may briefly draw higher current during normal startup.

If a project requires specific UL, CSA, RoHS, REACH, environmental, or material-compliance documentation, check the current documentation for the exact FLSR050 catalog number. Certification and material requirements can be important for engineered projects, so they should be confirmed for the individual part rather than assumed from the product family.

Where It Works Best

The FLSR050 makes the most sense in circuits where a standard fast-acting response may not be appropriate. Motors and transformers are good examples because both can pull considerably more current for a short period when first energized. The time-delay characteristic gives properly designed circuits room for that normal inrush while maintaining protection when an overload lasts too long, or a short circuit occurs.

You'll commonly find this type of 50A Class RK5 fuse suited to properly specified motor branch circuits, motor control equipment, transformers, industrial machinery, feeders, switchboards, service equipment, and general industrial power distribution.