Littelfuse LA15QS450-4 - The Littelfuse LA15QS series semiconductor fuses were designed for the specific protection of diodes and other semiconductor devices rated 150VAC/DC. The LA15QS product lines compact design is perfect for those applications that have limitations on available space.
Littelfuse

LA15QS450-4

Alternate Item Number: LA15QS4504

UPC: 079458156133


Documents & Media
Brochure

Contact for Pricing

Overview

The Littelfuse LA15QS450-4 semiconductor fuse is a high-performance, space-saving solution engineered for the precise protection of diodes and other sensitive semiconductor devices operating at 150VAC/DC. Designed for applications where space is at a premium, this compact fuse combines robust construction with exceptional reliability, ensuring optimal performance in even the most demanding industrial environments. The LA15QS series is part of Littelfuse’s trusted portfolio of semiconductor protection devices, a brand synonymous with innovation and durability in electrical safety solutions. Semiconductor devices, including diodes, thyristors, and transistors, are critical components in modern power electronics, renewable energy systems, motor drives, and industrial automation. These components are highly susceptible to overcurrent conditions, which can result in catastrophic failure, costly downtime, and safety hazards. The LA15QS450-4 fuse is specifically designed to address these risks by providing fast, accurate overcurrent protection tailored to the unique characteristics of semiconductor devices. Its 150VAC/DC rating makes it ideal for both AC and DC applications, offering versatility across a wide range of systems. One of the standout features of the LA15QS450-4 is its compact form factor, which allows for installation in space-constrained environments without compromising protection. This is particularly valuable in industries such as renewable energy (solar inverters, wind power systems), electric vehicle charging infrastructure, and high-frequency switching power supplies, where compact designs are essential for efficiency and performance. The fuse’s low-profile design also simplifies integration into existing systems, reducing the need for extensive redesign or additional mounting hardware. Professionals in industrial and electronic engineering rely on Littelfuse for its unwavering commitment to quality and safety. The LA15QS series is manufactured to meet stringent industry standards, including UL and IEC certifications, ensuring compliance with global safety regulations. Its fast-acting response time minimizes the risk of damage to sensitive semiconductor components, while its high interrupting rating provides robust protection against short circuits and transient surges. This combination of speed and reliability is critical in applications where even a millisecond of overcurrent can lead to system failure. Installation of the LA15QS450-4 is straightforward, with options for both panel mounting and direct PCB integration, depending on the application requirements. Littelfuse provides comprehensive technical documentation, including datasheets and application notes, to assist engineers in selecting the appropriate fuse for their specific needs. The fuse’s compatibility with a wide range of semiconductor devices, including fast recovery diodes and IGBTs, further enhances its versatility. In summary, the Littelfuse LA15QS450-4 semiconductor fuse is a trusted choice for professionals seeking reliable, space-efficient overcurrent protection for semiconductor devices rated at 150VAC/DC. Its robust construction, fast response, and compliance with industry standards make it an ideal solution for applications in power electronics, industrial automation, and renewable energy systems. By choosing Littelfuse, engineers and system designers gain access to a legacy of innovation and a commitment to safety that ensures long-term reliability and peace of mind.
  • Compact design ideal for space-constrained applications
  • 150VAC/DC rating for versatile AC/DC protection
  • Fast-acting response to prevent semiconductor damage
  • UL and IEC certified for global compliance
  • Trusted by professionals in power electronics, renewables, and automation

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
LA 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 Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
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.

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.