Littelfuse LA15QS12-2 - 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

LA15QS12-2

Alternate Item Number: LA15QS122

UPC: 079458155761


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Overview

The Littelfuse LA15QS12-2 semiconductor fuse is a high-performance protection solution engineered for diodes and sensitive semiconductor devices operating at 150VAC/DC. Designed for space-constrained environments, this compact fuse delivers reliable overcurrent protection while maintaining operational integrity in demanding industrial and electronic systems. As part of the LA15QS series, it exemplifies Littelfuse’s commitment to precision engineering and durability, making it a trusted choice for engineers and technicians who prioritize both safety and efficiency in their designs. Semiconductor protection is critical in modern power electronics, where even brief overcurrent events can lead to catastrophic failures. The LA15QS12-2 addresses this challenge with a specialized design optimized for semiconductor applications, including rectifiers, thyristors, and other high-speed switching devices. Its 150VAC/DC rating ensures compatibility with a wide range of industrial power systems, from motor drives and inverters to renewable energy systems and industrial automation equipment. By integrating this fuse into your design, you mitigate the risk of thermal runaway, short circuits, and other failure modes that can compromise system reliability. One of the standout features of the LA15QS12-2 is its compact form factor, which is specifically tailored for applications where board space is at a premium. Unlike traditional fuses that may require additional mounting hardware or larger footprints, this semiconductor fuse is designed to fit seamlessly into tight enclosures without sacrificing performance. This makes it an ideal solution for: - **Power supplies and converters** in industrial machinery - **Motor control systems** where space and reliability are critical - **Renewable energy inverters** requiring high-efficiency protection - **Automotive and transportation electronics** with stringent space constraints - **Telecommunications and data center power distribution** units Installation and maintenance are straightforward, thanks to Littelfuse’s user-centric design. The fuse is compatible with standard fuse holders and can be easily integrated into existing protection schemes. Its fast-acting response time ensures that semiconductor devices are shielded from transient overcurrents, while its robust construction guarantees long-term reliability even in harsh operating conditions. Whether deployed in high-temperature environments or vibration-prone industrial settings, the LA15QS12-2 maintains consistent performance. Littelfuse, a global leader in circuit protection solutions, has built a reputation for innovation and quality over decades. The LA15QS series, including the LA15QS12-2, reflects the company’s deep expertise in semiconductor protection, backed by rigorous testing and compliance with international standards. Professionals in industries such as manufacturing, energy, and electronics rely on Littelfuse fuses to safeguard critical components, reduce downtime, and extend the lifespan of their systems. By choosing the LA15QS12-2, you’re not just selecting a fuse—you’re investing in a solution that enhances the safety, efficiency, and longevity of your entire electrical system. For engineers and procurement teams, the LA15QS12-2 offers a cost-effective balance of performance and reliability. Its availability in standard configurations and compliance with industry certifications (such as UL, CE, and RoHS) ensures seamless integration into global supply chains. Whether you’re designing a new system or retrofitting an existing one, this semiconductor fuse provides the protection your sensitive electronics demand—without the bulk of traditional solutions.
  • Compact design for space-constrained applications
  • 150VAC/DC rating for versatile industrial use
  • Fast-acting protection for diodes and semiconductors
  • Durable construction for harsh environments
  • Compatible with standard fuse holders and systems

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Series
LA15QS
Size
Compact
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
LA Series
Type
Semiconductor Fuse
Voltage Rating
150VAC/DC
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.