Overview
The Littelfuse FLSR-12-ID is a Class RK5 dual-element time-delay indicator fuse rated for 12 amperes at 600VAC/300VDC. This cartridge-style fuse provides reliable protection for circuits containing motors and other inductive loads. The visual trip indicator design eliminates guesswork during fuse inspection, reducing maintenance time and improving system uptime.
Key Features
- Dual-element time-delay design for motor circuit protection
- Visual blown-fuse indicator for at-a-glance status confirmation
- Class RK5 current-limiting fuse per UL 248-12 standards
- 200,000 AIC symmetrical interrupting rating at 600VAC
- Cartridge terminal with ceramic body construction
- UL listed and CSA certified for wide industrial acceptance
Technical Specifications
- Current Rating: 12A
- Voltage Rating: 600VAC / 300VDC
- Class: RK5 (Current Limiting)
- Type: Time Delay (Slow Blow)
- Interrupting Rating: 200,000 AIC @ 600VAC; 20,000 AIC @ 300VDC
- Terminal Type: Cartridge
- Dimensions: 13/16″ diameter × 5″ length
- Features: Dual Element, Visual Trip Indicator
- Certifications: UL 248-12, CSA, CE
Typical Applications
The FLSR-12-ID is suitable for protecting:
- General-purpose AC circuits with inductive loads
- Motor control circuits and branch feeders
- Industrial machinery and production equipment
- HVAC systems and compressor circuits
- Other equipment requiring nuisance-trip prevention
Compatibility & Replacements
Compatible With
- Standard cartridge fuse holders rated for Class RK5 fuses
- Industrial control panels and electrical enclosures
- Motor control centers (MCCs)
- Distribution equipment rated for 600VAC service
- Any circuit designed for 12A RK5 time-delay protection
Replaces / Drop-In Replacement For
- Littelfuse FLSR-12 (non-indicator version)
- Equivalent 12A Class RK5 time-delay cartridge fuses
- Original equipment manufacturer (OEM) replacements for FLSR series installations
Works With
- Fuse holders rated for 600VAC cartridge fuses
- Class RK5 fuse blocks and disconnect switches
- Standard electrical power distribution systems
- Motors and inductive load circuits requiring time-delay protection
