Littelfuse KLK004 - KLK004 is a Midget fuse with an ampere rating of 4.
Littelfuse

KLK004

Alternate Item Number: 0KLK004.T

UPC: 079458250534

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Overview

The Littelfuse KLK004 Midget Fuse (SKU: KLK004) stands as a critical component for reliable overcurrent protection in demanding industrial environments. Engineered by Littelfuse, a globally recognized leader in circuit protection solutions, this Midget fuse delivers dependable performance where it matters most. With a precise 4 Ampere (4A) current rating, the KLK004 is meticulously designed to safeguard sensitive electrical equipment and circuits from damaging overloads and short circuits, thereby preventing costly downtime and potential safety hazards. This fuse belongs to the widely adopted Midget series, known for its compact dimensions and robust construction, making it an ideal choice for applications where space is a premium. Its small form factor does not compromise its protective capabilities; instead, it allows for integration into a vast array of electrical panels, control systems, and machinery. The primary function of the KLK004 is to act as a sacrificial element, intentionally designed to interrupt the flow of current when it exceeds a safe threshold. This interruption is crucial for preserving the integrity of connected devices, preventing thermal runaway, and ensuring the overall operational stability of industrial systems. Industrial applications for the Littelfuse KLK004 Midget Fuse are extensive and varied. It is commonly found protecting control circuits, power supplies, motor drives, lighting systems, and various other electrical assemblies within manufacturing plants, processing facilities, and utility infrastructure. Professionals in electrical engineering, maintenance, and panel building rely on fuses like the KLK004 for their predictable and consistent performance. The selection of a fuse with the correct ampere rating, such as the 4A of the KLK004, is paramount. It must be rated to handle the normal operating current of the circuit while being sensitive enough to react swiftly to fault conditions. Incorrect fuse selection can lead to nuisance tripping or, worse, inadequate protection, both of which can have significant operational and financial consequences. Littelfuse's commitment to quality and innovation is evident in the KLK004. Each fuse undergoes rigorous testing to meet stringent industry standards, ensuring that it will perform as expected when called upon. The reliability of Littelfuse products is a cornerstone of their reputation, providing engineers and technicians with the confidence that their critical circuits are protected by components that will not fail unexpectedly. When specifying circuit protection for industrial machinery, control panels, or any application requiring precise and dependable overcurrent interruption, the Littelfuse KLK004 Midget Fuse, with its 4A rating, represents a sound and trustworthy choice. Its compact size, coupled with Littelfuse's legacy of excellence in circuit protection, makes it an indispensable component for maintaining operational continuity and safety.
  • Littelfuse KLK004 Midget Fuse for reliable circuit protection.
  • Features a precise 4 Ampere (4A) current rating.
  • Compact Midget series design ideal for space-constrained applications.
  • Engineered for robust overcurrent and short-circuit protection in industrial settings.
  • Trusted Littelfuse quality ensures dependable performance and safety.

Specifications

Application
control circuits
Brand Name
Littelfuse
Current Rating
4 A
Interrupt Rating
100;50 kA;kA
Series
Midget
Special Features
RoHS
Sub Brand
KLK Series
Type
Fast-Acting
Voltage Rating
600 VAC
Package Weight (Imperial)
0.015 L
Package Weight (Metric)
6.700 g
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.