BUSSMANN FNM-4 Time-Delay Fuse, Midget Style, 4 A, 250 V

Bussmann FNM-4 fuse is a compact & reliable circuit protection device used in commercial settings, safeguarding circuits and equipment from overcurrent conditions that could lead to damage or fire hazards. This fuse is used in lighting systems, HVAC units and industrial machinery.

Working Mechanism:

• As the excessive current flows through the fuse element, it generates heat due to its resistance. If the current surpasses the fuse's rated current, the generated heat increases and becomes intense enough to melt the fuse element.
• As the fuse element melts, it creates an open circuit in the electrical path, interrupting the current flow. This break in the circuit prevents further electrical current from passing through and protects the downstream components or devices from damage.

Features:

• Bussmann FNM-4 fuse is made from durable fiberglass for high strength and insulation for dependable use.
• It has a cylindrical design, ensuring secure and straightforward installation.
• This midget fuse features a dual-element design for enhanced protection and reliability in various circuit applications.
• It comes with a time delay characteristic, offering a controlled response and protection in specific operational scenarios.
• This fuse has an interrupt capacity of 10kA at 125VAC and 200A at 250VAC.

Frequently Asked Questions:

Q. What are the advantages of using this Bussmann 4A fuse?

A. This fuse offers precise and reliable protection against overcurrent conditions. They are fast-acting and can quickly interrupt current to prevent damage. Their compact size makes them suitable for industrial applications.

Q. How do I choose right electric fuse for my application?

A. Select a fuse with a current rating slightly higher than the circuit's normal operating current. It should not exceed the fuse's rated current, as this could lead to false blowing or inadequate protection.

Q. What's the difference between fast-acting and slow-blow fuse?

A. Fast-acting fuse responds quickly to overcurrents and is suitable for protecting sensitive electronics. Slow-blow fuse tolerates short-duration overloads and is used for less sensitive equipment.