Industrial Fuses
Manufacturer Profile
Since 1927, Littelfuse has been developing industry leading circuit protection solutions. The industrial division delivers vital products to address customer needs for protection, safe control and distribution of electrical power in industrial applications. Littelfuse's product portfolio includes a comprehensive line of fuses and fuse holders to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from injury due to electrical faults.
Featured Product Categories
Class RK5 Cartridge Fuses
Littelfuse offers several series of current-limiting Class RK5 fuses for superior short-circuit protection. Each boasts dual-element design and time-delayed performance that eliminates nuisance opening.
Explore RK5 Fuses stocked at Mars Electric here
Class RK1 Fuses
POWR-PRO® Class RK1 fuses for maximum circuit protection. They are extremely current-limiting and provide advanced protection by allowing less damaging energy to pass through them while opening. These fuses are available in fast-acting or time-delay versions.
Explore RK1 product series here
Class CC Fuses
Littelfuse offers three different series of Class CC dual-element fuses that are specifically designed to protect different types of components. The CCMR time-delay fuses offer superior protection of motor circuits up to 40 hp. The KLDR time-delay fuses are designed to withstand the high magnetizing in-rush of transformers. The KLKR fast-acting fuses are used for protection of equipment containing solid-state devices or other components requiring fast response on overloads.
More information on Class CC fuses can be found here
Class J Fuse
Littelfuse offers three types of current-limiting Class J fuses to meet the need for circuit protection in industrial and electrical power generation and transmission applications. Fast-acting JLS series fuses provide space-saving overload and short-circuit protection in industrial and power conversion applications. JTD time-delay fuses employ POWR-PRO® technology to ensure very high interrupting ratings and are specifically designed for use where space is limited. JTD_ID fuses share the same features and benefits of JTD series fuses but also feature blown-fuse indicators.
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Class L Fuses
Current-limiting Class L fuses are available in fast-acting and time-delay versions. Fuses in the LDC and KLPC series feature POWR-PRO® performance, and LDC series fuses are the first in this class of UL Class industrial fuses rated at 600 V ac and 600 V dc. Littelfuse also offers KLLU series Class L fuses with POWR-GARD® performance. Common applications include protecting circuits that carry loads as high as 6 kA for electrified crane rails, light rail systems, and large electric motors.
Learn more here
Class T Fuses
At less than one-third the size of similarly performing Class R fuses, current-limiting POWR-GARD® Class T fuses offer space-saving overcurrent and short-circuit protection solutions in applications requiring fuses with current ratings higher than 30 A.
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Industrial Fuse Consolidation Program
Optimize your fuse inventory, improve safety, and lower operating costs. Join Littelfuse’s Materials Reduction Opportunity Program. It’s free. Read more about here
Fuse Fundamental Guide
At the heart of electrical systems, fuses keep operations live. The fires, explosions, and poisonous fumes caused by an uncontrolled overcurrent can injure and kill personnel. These injuries and deaths are easily avoidable with sufficient overcurrent protection. Electrical codes and other applicable design and installation standards help avoid these hazards with requirements for overcurrent protection. This paper will go over everything you need to know to understand which fuse is best for your application. Download Technical Paper
Industrial Fuse Cross Reference Guide
This cross reference covers the most popular fuses for which there is a similar Littelfuse standard item. Furnished for your convenience, it is meant to serve as a guide for product selection. We suggest you check all applicable specs before making substitutions. For special applications, more complete information, and for fuse block and medium voltage fuse cross referencing, complete the contact form below.