Littelfuse KLKR004 KLKR004 is a Class CC fuse with an ampere rating of 4.

Name: Littelfuse KLKR004 Class CC Fuse, 4A, for industrial circuit protection.
Brand: Littelfuse
SKU: KLKR004
Availability: InStock

Alternate Item Number: KLKR004.T

UPC: 079458260533

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Overview

The Littelfuse KLKR004 is a high-quality Class CC fuse engineered for robust and reliable circuit protection in demanding industrial and commercial environments. With a precise 4-ampere (4A) current rating, this fuse is meticulously designed to safeguard sensitive electrical systems and equipment from the detrimental effects of overcurrents and short circuits. Its adherence to stringent industry standards ensures optimal performance, preventing costly downtime and equipment damage. Class CC fuses, like the KLKR004, are a critical component in modern electrical installations, offering a compact footprint and superior interrupting ratings compared to older fuse classes. This makes them ideal for applications where space is at a premium, such as in control panels, motor control centers, and power distribution units. The Littelfuse KLKR004's 4A rating makes it particularly suitable for protecting smaller motor loads, control circuits, and electronic power supplies where precise overcurrent protection is paramount. Engineered for durability and longevity, the KLKR004 features a robust construction that can withstand the rigors of industrial settings. Its reliable operation ensures that it will consistently perform its protective function when needed, offering peace of mind to engineers and maintenance personnel. The Littelfuse brand is synonymous with excellence in circuit protection, and the KLKR004 exemplifies this commitment to quality and dependability. When selecting fuses for critical applications, choosing a trusted manufacturer like Littelfuse is essential for ensuring the safety and operational integrity of your electrical infrastructure. Key features and benefits of the Littelfuse KLKR004 include: * **Precise 4A Current Rating:** Offers targeted protection for specific circuit requirements. * **Class CC Designation:** Provides high interrupting capacity in a compact size. * **Reliable Overcurrent Protection:** Prevents damage to sensitive equipment and minimizes downtime. * **Industrial-Grade Construction:** Built to withstand harsh operating conditions. * **Trusted Littelfuse Quality:** Backed by a leader in circuit protection solutions. Applications for the KLKR004 are widespread across various industrial sectors, including manufacturing, automation, HVAC systems, and building management. It is an excellent choice for protecting: * Control transformers * Motor starters * Variable frequency drives (VFDs) * Power supplies * Lighting control systems * General purpose branch circuits By incorporating the Littelfuse KLKR004 into your electrical designs, you are investing in a proven solution that enhances safety, improves reliability, and contributes to the overall efficiency of your industrial operations. Trust Littelfuse for superior circuit protection that meets the evolving demands of modern electrical systems.

Littelfuse KLKR004 Class CC fuse with a 4 Ampere (4A) current rating.
Designed for reliable overcurrent and short-circuit protection in industrial applications.
Compact Class CC fuse design offers high interrupting capacity.
Ideal for protecting control circuits, power supplies, and motor loads.
Ensures equipment safety and minimizes operational downtime.

Specifications

Application	General Purpose
Brand Name	Littelfuse
Current Rating	4 A
Special Features	Fast-Acting
Standard	248-4 UL Listed/CSA
Sub Brand	KLKR Series
Type	Class CC
Package Weight (Imperial)	0.030 L
Package Weight (Metric)	13.620 g

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Frequently Asked Questions

How do arc-flash protection relays enhance safety?

Arc-flash relays detect developing arc-flash incidents and send a trip signal to interrupt power before significant damage occurs.

What types of motor protection does Littelfuse offer?

Littelfuse offers voltage monitors, current monitors, and Bluetooth-enhanced overload relays for low and medium voltage motor protection applications.

What types of fuses does Littelfuse offer for industrial applications?

Littelfuse offers UL Class fuses, high-speed fuses, medium voltage fuses, 10 x 38 mm fuses, and solar fuses for industrial applications.

What are high-speed fuses used for?

High-speed fuses protect critical power semiconductor devices against short circuits in power conversion applications like inverters and variable-speed drives.

What do E-rated and R-rated medium voltage fuses protect?

E-rated and R-rated medium voltage fuses protect transformers, potential transformers, feeders, and motor circuits.

What are the voltage and current ratings for 10 x 38 mm fuses?

10 x 38 mm fuses range from 125 to 1000 volts and 1/10 to 30 amperes.

What is the maximum voltage for Littelfuse solar fuses and holders?

Littelfuse offers solar fuses and holders up to 1500 Vdc for both high-current and low-current applications.

What are the benefits of Littelfuse fuse blocks and holders?

Littelfuse fuse blocks and holders are selected for their compact designs, indication features, and flexibility of DIN-rail mounting.

What is the purpose of POWR-BLOKS power distribution blocks?

POWR-BLOKS power distribution blocks provide a safe and convenient way to splice cables and manage power distribution within panels and systems.

What are Littelfuse Pre-Engineered Fusible Switches & Panels designed for?

These UL Listed, pre-built, customizable products are designed to meet NEC® coordination requirements, saving time and money for the Construction Market.

Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.