Littelfuse KLC175 - Designed to protect today’s equipment and systems, Littelfuse semiconductor fuses are manufactured with Littelfuse-developed technology that sets tomorrow’s standards for accuracy, consistent quality, reliability, and predictable performance. By using advanced metallurgical, polymer, and materials research; mathematical modeling, and computerized statistical analysis; Littelfuse engineers have redefined “State-of-the-Art.”
Littelfuse

KLC175

Alternate Item Number: 0KLC175.X

UPC: 079458230871


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BrochureTechnical BulletinSpecification Sheet

Contact for Pricing

Overview

The Littelfuse KLC175 (SKU: KLC175) is a traditional North American style, high-speed semiconductor fuse specifically designed for the protection of power semiconductor devices operating in 600 V AC systems. Manufactured by Littelfuse, a leader in circuit protection, the KLC175 leverages decades of expertise in advanced metallurgical, polymer, and materials research, combined with sophisticated mathematical modeling and computerized statistical analysis. This proprietary technology ensures exceptional accuracy, consistent quality, reliability, and predictable performance, setting the standard for semiconductor fuse technology. The KLC175 series is primarily recommended for replacement purposes in existing North American installations, ensuring the continued reliable operation of critical power electronic systems. While the L70QS series is the preferred choice for new designs, the KLC series, including the KLC175, remains vital for maintaining the integrity of established infrastructure. Its high-speed interruption capability is crucial for safeguarding sensitive semiconductor components such as SCRs, diodes, and transistors from damaging overcurrent events. Key specifications and features of the Littelfuse KLC175 include: * **Voltage Rating:** 600 V AC * **Series:** KLC * **Style:** Traditional North American * **Functionality:** High-speed interruption * **Protection:** Designed for power semiconductor devices (SCRs, diodes, transistors) * **Application Focus:** Replacement in existing North American systems Applications for the KLC175 are found in various power electronic equipment where precise and rapid protection of semiconductors is paramount. This includes motor drives, inverters, rectifiers, and power conversion equipment. By preventing catastrophic failures through its predictable performance and high interrupting capability, the KLC175 contributes to enhanced system uptime and reduced maintenance costs. Trust Littelfuse for dependable circuit protection that safeguards your valuable equipment.
  • High-speed interruption for sensitive semiconductor protection
  • Rated for 600 V AC industrial and power systems
  • Traditional North American style for easy replacement
  • Proprietary Littelfuse technology ensures predictable performance
  • Designed for SCRs, diodes, and transistors in power electronics

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
POWR-GARD KLC Series
Type
Semiconductor Fuse
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

What technical support resources does Littelfuse offer?

Littelfuse provides a Techline with technical experts who can answer product questions, provide cross references, engineering drawings, and application assistance. They can be contacted at 1-800-TEC-FUSE or [email protected].

How can distributors access Littelfuse product information?

Distributors can access product information through the Littelfuse Business Center website, which offers product availability, pricing, order placement, order status, and technical resources.

What training resources are available for Littelfuse products?

Littelfuse University provides in-depth training courses ranging from 3 to 20 minutes, covering products, programs, and tools at various skill levels. Courses can be accessed at LittelfuseUniversity.com.

What marketing support does Littelfuse provide to distributors?

Littelfuse offers a Marketing to Marketing program that includes co-branded email campaigns, content sharing, marketing tools, product launch support, and partner planning meetings.

How can distributors promote Littelfuse products?

Littelfuse offers a Promotional Allowance Program that supports demand generation campaigns, sales incentives, joint email campaigns, trade shows, events, advertising, and digital campaigns.

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.