Bussmann Time Delay Midget Fuse FNM Series 5A 250V Dual Element Non-Indicating Ferrule End

Bussmann Time Delay Midget Fuse FNM Series 5A 250V Dual Element Non-Indicating Ferrule End

Professional-Grade Compact Circuit Protection for Control Applications

The Bussmann Time Delay Midget Fuse FNM Series delivers superior electrical protection and circuit safety for control circuits, instrumentation, and compact electrical applications. This midget time delay fuse features dual element technology designed for electrical contractors, industrial facilities, and commercial installations, providing the reliable overcurrent protection and industry-leading safety that electrical professionals demand in space-constrained applications.

Professional Features & Benefits

Time Delay Protection Technology

• Dual Element Design - Provides time delay characteristics to handle motor starting currents and temporary overloads while clearing dangerous short circuits quickly
• 5 Ampere Rating - Precisely calibrated for control circuit protection with reliable overcurrent response
• 250V Voltage Rating - Suitable for standard control voltage applications with excellent arc suppression capability
• Compact Midget Size - Space-saving 1.5" x 0.41" design ideal for control panels and instrumentation applications

Safety & Standards Compliance

• 10 kAIC Interrupt Rating at 125VAC - Safely clears fault currents up to 10,000 amperes for reliable circuit protection
• CE Marked Compliance - Meets European safety standards for international electrical installations
• Non-Indicating Design - Professional appearance with reliable operation indication through circuit monitoring

Technical Specifications

5 ampere current rating, 250 volt maximum voltage, 10 kAIC interrupt rating at 125VAC, dual element time delay construction, ferrule end connections, 1.5" length x 0.41" diameter, 0.2 lb weight, nickel-plated bronze endcaps for corrosion resistance, non-indicating operation, midget fuse classification, CE marked compliance.

Installation & Setup

1. Verify power is completely disconnected and use proper lockout/tagout procedures before fuse installation
2. Inspect fuse holder contacts for cleanliness and proper spring tension to ensure reliable electrical connection
3. Insert fuse with ferrule ends fully seated in holder contacts, ensuring proper alignment and secure fit
4. Verify fuse amperage rating matches circuit protection requirements and does not exceed conductor ampacity
5. Test circuit operation after installation to confirm proper fuse function and circuit protection
6. Document fuse installation with amperage rating and installation date for maintenance records

Professional Applications

Ideal for:

• Control Circuit Protection - Motor control circuits, relay circuits, and automation system protection
• Instrumentation Circuits - Meter protection, sensor circuits, and measurement equipment safety
• Lighting Control Systems - Dimmer circuits, lighting contactors, and photocell control protection
• HVAC Control Circuits - Thermostat circuits, damper controls, and building automation systems
• Industrial Control Panels - PLC power supplies, HMI protection, and control transformer circuits
• Commercial Building Systems - Fire alarm circuits, security system power, and emergency lighting controls
• Motor Starting Circuits - Small motor protection with time delay for starting current accommodation
• Electronic Equipment Protection - Power supply circuits, electronic control modules, and sensitive equipment protection

Dual Element Time Delay Advantage

Bussmann dual element technology provides superior selective coordination by allowing temporary overloads while quickly clearing dangerous short circuits. The time delay characteristic prevents nuisance tripping during motor starting or equipment energization, while the current limiting action protects downstream components from damaging fault currents and reduces arc flash hazards.

Why Choose Bussmann Quality?

Bussmann demonstrates unwavering commitment to electrical safety through rigorous testing, CE marking compliance, and reliable overcurrent protection technology. Every FNM series fuse undergoes comprehensive quality control to ensure consistent performance in professional electrical installations, providing the circuit protection reliability and electrical safety that contractors and facility managers trust for critical control applications.