Eaton’s Bussmann series KTK fast-acting supplemental fuses for resistive loads such as control circuits, meter circuits and lighting circuit protection. These cartridge fuses have a melamine tube construction and nickel-plated end caps. For superior protection, Eaton Bussmann recommends upgrading to Low-Peak™ Class CC fuses.

What Speed is it?

These cartridge fuses are “F” speed rated, which is short for Fast Acting. This is also known as fast blow and is popular in general purpose applications. They are designed not to handle current spikes over the rated current.

What size is it?

These cartridge fuses are available in the compact size of 10x38 mm, also known as American Midget style fuses.

What voltage is it?

These cartridge fuses are available with 1 to 30 Amp current ratings for applications where the system voltage rating is 600 Volts AC.

What is Breaking Capacity?

Breaking capacity is the level of current that the fuse can safely handle without exploding or breaking. The breaking capacity of your fuse should be greater than the fault current of your electronic circuit.

What are cartridge fuses used for?

• For the protection of components and equipment from costly damage used by over-current
• To isolate sub-systems from the main system once a fault has appeared

What is an overcurrent?

It is a setting where a circuit experiences a current that is higher than the normal operating current.

• Color coded black for 600Vac voltage rating
• Fast-acting for resistive loads
• Melamine tube construction
• Nickel-plated endcaps
• Cylindrical body

UL listed, CSA certified

Looking for a fast-acting fuse to protect your electronic equipment and circuitry? This F-rated cartridge fuse from Eaton keeps your electrical components safe in the event of dangerous faults. You can install it to safeguard against damaging short circuits and overcurrent, which can cause overheating, cable melting and even equipment fires.
When a fault occurs, this fuse will act almost instantly to cut off the electrical supply and isolate sub-systems and equipment. You can use fuses like this one for resistive loads such as control, meter and lighting circuit protection.

• Compatible with high voltage systems up to 600V AC
• Heat-resistant melamine body and nickel-plated end caps prevent melting, arcing and fire
• Dimensions of 10 (diameter) x 38mm (length) are compatible with standard midget fuse holders
• Colour-coded black for easy identification of supply voltage capacity (600V AC)

F speed fuses are fast-acting. They're also known as fast-blow fuses and are designed to be very sensitive to overcurrents. F-rated fuses are commonly used in general-purpose applications such as in lighting circuits.

Eaton formerly known as Bussmann

American Standard Fuses

American standard cartridge fuses, including fast-acting Midget and Dual-element Time Delay types