Overview
The Bussmann FNQ-R-3 is a Class CC time-delay current-limiting fuse designed for demanding industrial applications. This lot includes 10 units, each rated at 3A, 600V AC. The FNQ-R series features dual-element construction with a melamine tube body that combines time-delay characteristics with superior current-limiting protection, making it ideal for circuits sensitive to inrush currents.
Key Features
- Time-Delay (Slow-Blow) — 12 second response at 200% current, preventing nuisance blows from temporary inrush
- Current-Limiting Protection — Class CC levels provide maximum component short circuit current protection
- Class CC Rejection — Rejection feature with appropriate fuse block prevents inserting lesser-rated supplementary fuses
- High Interrupt Rating — 200 kAIC (kiloampere) interrupt capacity ensures protection at all circuit locations
- Dual-Element Design — Combines thermal and magnetic protection for reliable overcurrent sensing
- Industrial-Grade — Applications include industrial facilities, control transformers, line protection, and safety systems
Technical Specifications
Reviewed from multiple distributor and manufacturer sources, the FNQ-R-3 provides:
Typical Applications
Branch circuits, line protection and small control transformers benefit from 10X better current limitation to help prevent equipment damage caused by short-circuit events. The time-delay characteristic makes these fuses well-suited for circuits with inrush currents from motor starters, solenoids, and small transformer loads where standard fast-blow fuses would nuisance trip.
Common installation locations include industrial control panels, isolated and in-line fuse holders, and safety/security system power supplies where reliable, repeatable protection is essential.
Compatibility & Replacements
Compatible With
- Class CC fuse holders and fuse blocks
- Ferrule-end fuse clips and cartridge holders
- Industrial control enclosures and panel assemblies
- Power distribution equipment rated for 600V AC
- Small control transformer circuits
Replaces / Drop-In Replacement For
The FNQ-R-3 is a standard replacement within the FNQ-R series. Verify exact compatibility with your system integrator before ordering if replacing older fuse types from different manufacturers.
Works With
- Class CC rejection-type fuse blocks
- 600V AC power systems
- Melamine-tube cartridge fuse holders
- Dual-element (time-delay) fuse applications
- Industrial and commercial electrical systems up to 600V
