Bussmann FNA-3 supplemental fuses are pin-indicating, time-delay dual-element units designed for protection of inductive circuits, control transformers, and electronic equipment. This lot contains 9 individual fuses, each new in original box condition.
Overview
The Bussmann FNA-3 is a midget-class supplemental fuse with time-delay (slow-blow) characteristics. The dual-element construction allows close sizing on circuits with high inrush currents, making it ideal for motor starters, relays, solenoids, and similar inductive loads. The pin-indicating design provides visual confirmation of fuse operation.
Key Features
- Dual-element time-delay construction permits close current sizing
- Pin-indicating design for quick visual inspection of fuse status
- Silver-plated ferrule ends ensure reliable electrical contact
- Melamine tube construction with nickel-plated endcaps
- Conforms to UL 248-14 and CSA standards
Technical Specifications
- Ampere Rating: 3A
- Voltage Rating: 125 VAC (maximum)
- Interrupt Rating: 10 kA at 125 VAC
- Breaking Capacity: 200 A at 250 VAC
- Fuse Type: Supplemental Midget (5AG/AB Class)
- Speed: Time-Delay / Slow-Blow
- Ends: Ferrule x Ferrule
- Length: 1-1/2 inches
- Diameter: 13/32 inch
- Pin Type: Silver-plated (indicating)
- Construction: Melamine tube with nickel-plated endcaps
Typical Applications
- Control transformer protection with close sizing capability
- Relay and solenoid circuits with inductive loads
- Electronic circuit protection in panel-mount applications
- Motor control starter circuits requiring soft inrush protection
- Industrial machinery and automation system supplemental protection
Compatibility & Replacements
Compatible With
- Any panel or fuse holder designed for midget (5AG/AB) class supplemental fuses
- Control circuit panels operating at 125 VAC and below
- Industrial control systems and machinery requiring supplemental overcurrent protection
- Equipment rated for time-delay fuse protection
Replaces / Drop-In Replacement For
- Cooper Bussmann FNA-3 (original designation)
- Older inventory of FNA-3 fuses requiring replenishment
- Any equivalent 3A supplemental midget time-delay fuse (verify mechanical fit before installation)
Works With
- Midget fuse clips and reject-style holders
- UL 248-14 certified control circuit equipment
- Eaton/Bussmann series supplemental fuse systems
- Industrial relay and contactor assemblies
