Littelfuse L75QS600 - POWR-SPEED ROUND-BODY 750VDC 2ND GEN SEMICONDUCTOR FUSE
Littelfuse

L75QS600

UPC: 079458235906


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Overview

The Littelfuse L75QS600 POWR-SPEED ROUND-BODY 750VDC 2ND GEN SEMICONDUCTOR FUSE is a high-performance overcurrent protection solution engineered for the most demanding industrial environments. Designed to safeguard sensitive semiconductor components, this second-generation fuse delivers exceptional current-limiting performance and rapid response times to prevent damage from overcurrent events, voltage surges, and short circuits. Built on Littelfuse’s decades of expertise in circuit protection, the L75QS600 combines robust construction with advanced materials to ensure reliable operation under extreme thermal and electrical stress. This semiconductor fuse is specifically optimized for applications where precision protection is critical, such as power electronics, motor drives, inverters, and renewable energy systems. Its 750VDC rating makes it ideal for high-voltage DC applications, including solar power installations, battery storage systems, and industrial automation where consistent uptime is essential. The round-body design facilitates easy installation in tight panel spaces while maintaining superior dielectric strength and mechanical durability. Key features of the Littelfuse L75QS600 include: - **Fast-acting response** to minimize fault energy and protect sensitive components - **High interrupting rating** for reliable operation in high-fault-current scenarios - **Superior current-limiting capability** to reduce let-through energy during faults - **Robust round-body construction** for enhanced mechanical strength and thermal stability - **Second-generation design** incorporating lessons learned from field applications Industrial professionals choose the L75QS600 for its proven performance in mission-critical applications where equipment failure is not an option. Whether protecting IGBTs in motor drives, MOSFETs in power supplies, or thyristors in industrial heating systems, this fuse delivers the reliability that engineers demand. Littelfuse’s global reputation for quality circuit protection products stems from rigorous testing and adherence to international standards, ensuring that the L75QS600 meets or exceeds the requirements of UL, IEC, and other regulatory bodies. Installation is straightforward thanks to the fuse’s standardized dimensions and compatibility with common industrial fuse holders. Maintenance teams appreciate the predictable performance characteristics that allow for planned replacement schedules rather than emergency interventions. For applications requiring UL Type 2 coordination or compliance with specific industry standards, the L75QS600 provides the necessary performance characteristics while maintaining cost-effectiveness compared to custom protection solutions. When selecting a semiconductor fuse for high-voltage DC applications, the Littelfuse L75QS600 stands out as a trusted choice among power electronics engineers. Its combination of advanced protection features, durable construction, and manufacturer-backed reliability makes it an essential component in modern industrial protection schemes. Whether upgrading existing systems or designing new installations, professionals can rely on the L75QS600 to provide the robust overcurrent protection needed to maintain operational safety and equipment longevity in even the most challenging environments.
  • 750VDC rated for high-voltage industrial applications
  • Second-generation POWR-SPEED design with superior current-limiting
  • Fast-acting response to protect sensitive semiconductor components
  • Round-body construction for enhanced durability and installation flexibility
  • Ideal for power electronics, renewable energy, and industrial automation

Specifications

Series
POWR-SPEED
Series
POWR-SPEED 2nd Gen
Size
Round-Body
Voltage Rating
750 VDC
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.