Overview
The Bussmann FNQ-R-1/2 is a Class CC time-delay, dual-element current-limiting cartridge fuse designed for control circuit transformer protection and branch circuit applications. This 0.5A 600VAC fuse features fiber body, melamine tube and nickel-plated brass endcaps construction. This lot includes seven individual units suitable for replacing blown fuses in control panels, PLCs, and industrial automation systems.
Key Features
- Time-delay operation that allows high inrush currents typical of control transformers
- Current-limitation that protects downstream components against damaging thermal and magnetic effects of short-circuit currents
- Rejection style design with Class CC rating and 200 kA interrupt capacity
- Certified approvals: UL, CSA, CE, RoHS compliant
- Cartridge fuse body for use in standard CC fuse blocks and holders
- Dual-element construction for improved arc suppression and protection
Technical Specifications
- Current Rating: 0.5 A (also designated as 1/2 Amp)
- Voltage Rating: 600 VAC
- Interrupt Rating: 200 kA Vac RMS Sym.
- Fuse Class: Class CC
- Blow Characteristic: Time Delay / Slow Blow
- Body Type: Cartridge (dual-element)
- Dimensions: 0.41" Dia x 1.5" L (10.3mm x 38.1mm)
- Weight: 0.32 oz per fuse
- Time-delay minimum: 12 seconds at 200% rated current per UL 248-4
- Agency Certifications: UL Listed (Std. 248-4, Guide JDDZ), CSA Certified, CE, RoHS
Typical Applications
- Control circuit transformer protection
- Branch circuit protection in industrial control panels
- Small appliance and equipment fusing (motors, heaters, solenoids)
- PLC and automation system backup fusing
- Equipment with high inrush current requirements
- Commercial and industrial electrical systems rated 600VAC
Compatibility & Replacements
Compatible With
- Bussmann class CC fuse blocks and holders (BCM603 series, CHCC series, OPM series)
- Eaton/Bussmann modular open blocks and DIN-rail mounted holders
- Panel mount and in-line fuse holders rated for Class CC cartridge fuses
- Any 600VAC control circuit with Class CC rejection-style mounting
Replaces / Drop-In Replacement For
- Littelfuse KLDR 0.5A 600V equivalent
- Mersen ATQR 0.5A 600V equivalent
- Any blown or failing FNQ-R-1/2, FNQ-R-0.5, or FNQ-R 1/2A designation fuse
- Other Class CC 0.5A time-delay cartridge fuses in rejection-style holders
Works With
- Eaton Bussmann LIMITRON fuse series ecosystem
- Class CC UL 248-4 compliant control systems
- IEC 60127-2 cartridge fuse standards (where applicable)
- 600VAC industrial and commercial power distribution systems
