Overview
The Bussmann FNQ-30 is a supplemental time-delay midget fuse designed for circuit protection in control systems and low-voltage industrial applications. This cartridge-body fuse features dual-element, fiber tube construction with ferrule terminals, making it ideal for applications that require protection against overcurrent while toleratÂing temporary inrush currents.
Key Features
- Time-delay operation suitable for motor control transformers and circuits with in-rush currents
- Fiber tube construction with nickel-plated brass endcaps
- Dual-element design for current-limiting protection
- Non-indicating ferrule-end style for standard fuse holders
- Supplied in box of 10 pieces for convenient stocking
Technical Specifications
- Rated Current: 30A
- Voltage Rating: 500VAC
- Interrupting Rating: 10kA
- Fuse Type: Time-Delay / Slow-Blow
- Classification: Midget Fuse (Class CC Supplemental)
- Body Style: Cartridge, 13/32″ diameter x 1-1/2″ length
- Terminal Type: Ferrule end x ferrule end
- Element Design: Dual-element
- Quantity per Box: 10 pieces
- Agency Approvals: UL Listed (Std. 248-14, Guide JDYX), CSA Certified (C22.2 No. 248.14), CE and RoHS compliant
Typical Applications
- Motor control transformers
- Industrial control circuits with inrush currents
- Branch circuit protection in control panels
- Supplemental protection in low-voltage control systems
- Equipment requiring time-delay fuse protection
Compatibility & Replacements
Compatible With
- Standard Class CC cartridge fuse holders
- Industrial control panel fuse blocks rated for 500VAC supplemental fuses
- Motor control transformer circuits
- Any 500VAC control circuit with ferrule-style fuse blocks
Replaces / Drop-In Replacement For
- Legacy Bussmann FNQ-30 units
- Cooper Bussmann FNQ-30 (before Eaton acquisition)
- OEM-equivalent 30A/500VAC Class CC supplemental fuses
Works With
- Class CC fuse holders and blocks
- Industrial control relays and transformers
- Legacy and modern control panel designs requiring 500VAC supplemental protection
- UL 248-14 and CSA C22.2 No. 248.14 compliant systems
