Overview
The Ferraz Shawmut GFN1-1/4 is a compact midget cartridge fuse designed for AC equipment protection. With a 1.25-amp nominal rating, 250-volt AC voltage rating, and time-delay characteristic, this fuse is engineered to prevent nuisance trips while providing reliable overcurrent protection in demanding industrial and commercial environments. The fuse features a blown-fuse indicator that visually signals when the element has operated, aiding troubleshooting and maintenance.
Key Features
- Time-Delay Classification: 12-second delay at 200% rating minimizes false trips from inrush currents
- Visual Indicator: Built-in blown-fuse indicator pops out for immediate visual identification
- High Interrupting Rating: 200,000 AIC @ 250VAC handles fault events reliably
- Compact Midget Size: 13/32″ × 1 1/2″ form factor fits standard UltraSafe fuse holders
- UL/CSA Certified: Listed to UL 248-14 and CSA C22.2 No. 248.14 standards
- Bulk Pack: 8 pieces per box for convenient inventory management
Technical Specifications
- Amperage Rating: 1.25 A (GFN1-1/4)
- Voltage Rating: 250 VAC
- Interrupting Capacity: 200,000 AIC @ 250VAC
- Fuse Class: Midget / GFN Series
- Speed Characteristic: Time Delay
- Physical Dimensions: 13/32″ × 1 1/2″ (ferrule cartridge)
- Body Material: Ceramic with ferrule contacts
- Indicator Type: Visual blown-fuse indicator
- UL Standard: 248-14 (File: E33925)
- CSA Standard: C22.2 No. 248.14
- Quantity per Box: 8 pieces
Typical Applications
The GFN1-1/4 is suitable for:
- Industrial control circuits and equipment protection
- Commercial HVAC and facility systems
- Power distribution panels with low-amperage circuits
- Transformer and motor secondary protection
- Semiconductor and automation test equipment
- UPS and power conversion systems requiring selective protection
Compatibility & Replacements
Compatible With
- UltraSafe fuse holder models (USM1, USM1I, USM2, USM2I, USM3, USM3I)
- GFN-series compatible fuse blocks and cartridge holders
- Standard 250VAC single and multi-phase distribution systems
- Industrial equipment and control panels rated 250VAC
Replaces / Drop-In Replacement For
- Ferraz Shawmut GFN1-1/4 (equivalent to Mersen GFN1-1/4 post-acquisition)
- Direct replacement within GFN1 series – verify amperage rating matches your circuit requirements
Works With
- Standard cartridge fuse holders for 13/32″ × 1 1/2″ form factor
- Industrial automation control systems and PLCs using discrete DC/AC circuits
- Any 250VAC low-voltage protection scheme requiring time-delay fuse protection
