Overview
The Littelfuse FLNR10 Class RK5 fuse is a dual-element time-delay fuse designed for general-purpose electrical protection. The FLNR series sets the standard for general purpose fuses with a dual-element design providing advanced short-circuit and overload protection. This cartridge-style fuse is ideal for use in service entrance switches, transformers, switchboards, motor control circuits, and branch circuits throughout industrial and commercial electrical systems.
Key Features
- Dual-element design provides advanced short-circuit and overload protection
- Current limiting design with voltage ratings AC: 250V, DC: 125V
- UL Class RK5 rated with AC interrupting rating of 200 kA rms symmetrical (300 kA rms self-certified)
- Cartridge-style construction for standard fuse holders
- UL Listed and CSA Certified
- Time-delay characteristics reduce nuisance trips on inrush currents
Technical Specifications
Ampere Rating: 10A
Voltage Rating: 250VAC / 125VDC
Class: RK5
Type: Dual-Element, Time-Delay, Cartridge
AC Interrupting Rating: 200 kA rms symmetrical
DC Interrupting Rating: 20 kA
Certifications: UL Listed (E81895), CSA Certified (LR29862)
Standards: UL 248-12, Federal Specification WF-1814
Typical Applications
- Service entrance switches and main feeder protection
- Transformer primary circuit protection
- Switchboard and panelboard feeders
- Motor control center (MCC) branch circuits
- General-purpose distribution circuits
- Industrial machinery and equipment power distribution
Compatibility & Replacements
Compatible With
- Standard Class RK5 fuse holders and sockets
- UL-listed electrical panels and switchboards
- Motor control centers and disconnect switches
- Any circuit rated for Class RK5 fuses
- Equipment requiring time-delay fuse protection
Replaces / Drop-In Replacement For
- Earlier FLNR10 cartridge fuses
- Generic Class RK5 10A time-delay fuses
- Equipment-specific 10A RK5 fuse requirements
Works With
- Any 250VAC or 125VDC electrical circuit designed for Class RK5 fuses
- Fuse holders rated for 10A cartridge fuses
- Electrical systems requiring dual-element time-delay protection
- Standard North American electrical distribution systems
