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

Use this Eaton cartridge fuse to keep your circuit applications safe. It's a standard-size 10 x 38 mm 'midget' fuse, meaning it provides backup protection to control, meter and lighting circuits. KTK-series fast-acting fuses are designed to guard components and equipment against damage that can be caused by short-circuit scenarios. When a fault occurs, the fuse will blow quickly to isolate sub-systems and its protective function can also prevent cable melt or fire. Unlike its time-delayed counterparts, this F-rated device won't tolerate spikes over the rated circuit current.

• Can be used in multiple general-purpose circuits
• Colour-coded black for easy identification of 600 V AC supply
• High-quality melamine tube construction with nickel-plated end caps for a long lifetime

The rated voltage indicates the highest voltage that the fuse can safely handle. If the open circuit has a higher voltage than this figure, there's potential for arcing and other safety-compromising issues.

'Overcurrent' describes a fault or short-circuit current that's higher than the normal operating current.

Eaton formerly known as Bussmann

American Standard Fuses

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