LLNRK003 - 3Amp Fuse

LLNRK003 - 3Amp Fuse

When you're replacing a fuse, matching the amperage is only part of the job. The fuse class, voltage rating, opening characteristics, and interrupting capacity must match the equipment's requirements. The Littelfuse LLNRK003 is a 3-amp, Class RK1 time-delay fuse from the Littelfuse POWR-PRO series, designed to provide overload and short-circuit protection in compatible electrical systems.

Key Features and Benefits

• 3A continuous current rating: Intended for electrical circuits that require 3-amp overcurrent protection.
• Class RK1 classification: Designed for applications specifying Class RK1 fuse characteristics and compatible mounting equipment.
• 250VAC / 125VDC voltage ratings: Supports compatible AC and DC applications within the manufacturer's stated voltage limits.
• Non-indicating construction: Littelfuse identifies this model as non-indicating.
• Fuse block, clip, or holder mounting: Designed for installation in compatible fuse mounting equipment.

Technical Specifications

• Manufacturer: Littelfuse
  
• Catalog Number: LLNRK003
  
• Series: LLNRK
  
• Product Family: POWR-PRO
  
• Product Type: Time-Delay Fuse
  
• Fuse Class: Class RK1
  
• Continuous Current Rating: 3 Amps
  
• Maximum AC Voltage: 250VAC
  
• Maximum DC Voltage: 125VDC
  
• Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
  
• AC Interrupting Values: 200,000A and 300,000A at 250VAC, as listed in the manufacturer specifications
  
• DC Interrupting Rating: 20 kA at 125VDC
  
• Fuse Indicator: Non-Indicating
  
• Mounting Method: Fuse Block / Clip / Holder
  
• Manufacturer-Referenced Holder Series: LFR25030 Series
  

Material Compliance and Certifications

The manufacturer identifies the Littelfuse LLNRK003 as a Class RK1 fuse within the POWR-PRO product family.

Where It Works Best

Applications to consider include:

• Service entrance equipment: Compatible installations that specify Class RK1 overcurrent protection.
  
• Main and feeder circuits: Electrical distribution equipment requiring a 3A time-delay fuse with matching electrical ratings.
  
• General-purpose branch circuits: Applications that call for the LLNRK003's rated current and time-delay characteristics.
  
• Maintenance and repair: Form, fit, and functional replacement applications where the existing fuse requirements match the LLNRK003.