Littelfuse LA15QS1-2 - 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

LA15QS1-2

Alternate Item Number: LA15QS12

UPC: 079458155679


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Overview

The Littelfuse LA15QS1-2 semiconductor fuse is a high-performance, space-saving solution engineered for the precise protection of diodes and other sensitive semiconductor devices operating at up to 150VAC/DC. Designed for engineers and system integrators who demand reliability without sacrificing footprint, this fuse combines Littelfuse’s industry-leading expertise in overcurrent protection with a compact form factor that fits seamlessly into constrained enclosures. Whether deployed in power conversion systems, motor drives, or renewable energy inverters, the LA15QS1-2 ensures rapid fault interruption while maintaining operational integrity in critical applications where downtime is not an option. Semiconductor devices—including diodes, thyristors, and IGBTs—are highly susceptible to transient overcurrents and short circuits, which can lead to catastrophic failure if not properly mitigated. The LA15QS1-2 addresses this challenge with a fast-acting fuse design optimized for low let-through energy (I²t), minimizing stress on protected components during fault conditions. Its 150VAC/DC rating makes it a versatile choice for both AC and DC systems, from industrial automation to telecommunications infrastructure, where voltage levels and transient conditions vary widely. The fuse’s compact design, part of the LA15QS series, is particularly advantageous in modern electronics where board real estate is at a premium, such as in compact power supplies, LED drivers, or embedded control systems. Selecting the right semiconductor fuse requires balancing speed, breaking capacity, and physical constraints. The LA15QS1-2 excels in all three areas: its fast-acting characteristic ensures rapid response to faults, while its high interrupting rating (typically 100kA) provides robust protection against extreme overcurrents. Installation is straightforward, with standard fuse holder compatibility and a design that accommodates both panel mounting and PCB integration. For professionals evaluating protection solutions, Littelfuse’s reputation for precision engineering and rigorous testing—backed by decades of leadership in circuit protection—makes the LA15QS1-2 a trusted choice in mission-critical applications. Typical applications span a broad range of industries, including: - Power electronics (inverters, converters, rectifiers) - Industrial motor controls and variable frequency drives (VFDs) - Renewable energy systems (solar inverters, wind turbine converters) - Automotive and transportation electronics (charging systems, traction inverters) - Telecommunications and data center power distribution When paired with Littelfuse’s comprehensive portfolio of protection devices, the LA15QS1-2 becomes part of a holistic strategy to safeguard semiconductor assets, extend equipment lifespan, and ensure compliance with international safety standards such as UL, IEC, and EN. For engineers seeking a reliable, space-efficient fuse that delivers performance without compromise, the Littelfuse LA15QS1-2 stands out as a premier solution in semiconductor circuit protection.
  • 150VAC/DC rated for versatile AC/DC system protection
  • Compact design ideal for space-constrained applications
  • Fast-acting response with low I²t for minimal component stress
  • High interrupting rating (100kA typical) for extreme fault conditions
  • Compatible with standard fuse holders and PCB integration

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Mounting Type
PCB or fuse holder
Series
LA15QS
Size
Compact
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
LA Series
Type
Semiconductor Fuse
Voltage Rating
150VAC/DC
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9F61 Size B Clips 1.6in

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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.