Overview
The Bussmann FNM-15 is a time-delay supplemental fuse engineered for circuits requiring protection against inductive loads and high inrush currents. Each fuse in this lot of 10 units delivers dual-element protection with a melamine tube body and nickel-plated endcaps. The time-delay characteristic allows momentary motor startup surges to pass safely while protecting against sustained overload conditions.
Key Features
- Time-delay (slow-blow) design for circuits with motors, transformers, and inductive equipment
- Melamine tube construction with nickel-plated ferrule terminals
- Color-coded green for visual identification of 250Vac rating
- Dual-element internal design for superior protection
- Compact 13/32″ × 1-1/2″ cylindrical form factor
- UL Listed to Standard 248-14, CSA Certified, RoHS compliant
Technical Specifications
- Amperage Rating: 15A
- Voltage Rating: 250VAC (125VAC rated at 12–15A per UL 248-14)
- Interrupting Capacity: 10kA at 250VAC
- Fuse Class: CC / Supplemental (midget)
- Fuse Speed: Time-Delay (Type A)
- Body Diameter: 13/32″ (0.406″)
- Body Length: 1-1/2″ (1.5″)
- Terminal Type: Ferrule (knife-blade compatible holders)
- Material: Melamine tube body, nickel-plated endcaps
- Certifications: UL Listed Std. 248-14 (File E19180, Guide JDYX), CSA, RoHS
- Quantity per Carton: 10 fuses
Typical Applications
- Circuits with high inrush currents (motor and transformer loads)
- Supplemental protection for general purpose circuits and lighting protection
- Meter circuits and electrical equipment in industrial and commercial settings
- Pool pumps, spas, and HVAC systems with startup surge protection
- Branch circuits in residential and commercial electrical panels
Compatibility & Replacements
Compatible With
- Midget fuse blocks rated for 13/32″ × 1-1/2″ cartridge fuses
- Holder-mount equipment requiring Class CC / Supplemental fuses
- Circuits rated 250VAC or lower (125VAC for 12–15A range)
- Motor control circuits, lighting panels, and HVAC equipment
Replaces / Drop-In Replacement For
- OEM FNM-15 fuses in existing equipment
- Legacy or worn-out time-delay midget cartridge fuses rated 15A, 250V
- Verify fuse block compatibility before ordering
Works With
- Any Class CC or Supplemental fuse holder designed for 13/32″ × 1-1/2″ ferrule-terminal fuses
- Standard electrical panels and equipment compliant with UL 248-14
- Industrial motor starters, control panels, and commercial HVAC installations
