Littelfuse LA15QS4000-128 - 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

LA15QS4000-128

Alternate Item Number: LA15QS4000128

UPC: 079458156362


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Overview

The Littelfuse LA15QS4000-128 is a high-performance semiconductor fuse meticulously engineered to provide superior protection for sensitive diodes and other semiconductor devices operating at up to 150VAC/DC. Manufactured by Littelfuse, a globally recognized leader in circuit protection, this fuse embodies the company's commitment to reliability, safety, and innovation in demanding industrial and electronic environments. Designed with a specific focus on space-constrained applications, the LA15QS series, including the LA15QS4000-128, features a remarkably compact form factor. This allows for seamless integration into densely populated circuit boards and enclosures where every millimeter of space is critical. This design consideration is paramount in modern electronic equipment, where miniaturization is a key trend across various sectors, from telecommunications and computing to automotive and industrial automation. The primary function of the LA15QS4000-128 is to safeguard valuable semiconductor components from damaging overcurrent and short-circuit conditions. Semiconductors, particularly diodes, are highly susceptible to thermal runaway and catastrophic failure when subjected to excessive current. This fuse acts as a sacrificial element, rapidly interrupting the circuit to prevent such damage, thereby extending the operational lifespan of the protected equipment and minimizing costly downtime. Its 150VAC/DC rating makes it versatile for a wide range of power supply circuits, inverters, converters, and other DC-powered systems. Key benefits of employing the Littelfuse LA15QS4000-128 include: * **Precise Semiconductor Protection:** Specifically designed for the unique characteristics of semiconductor devices, offering optimal protection against transient and sustained overcurrents. * **Space-Saving Design:** Its compact dimensions are ideal for applications with limited PCB real estate or enclosure volume, facilitating efficient system design. * **Broad Voltage Compatibility:** Rated for 150VAC/DC, providing flexibility for various power system configurations. * **Enhanced System Reliability:** By preventing semiconductor failure, it contributes to the overall stability and dependability of electronic systems. * **Trusted Manufacturer:** Littelfuse's extensive experience and reputation in circuit protection ensure a high-quality and reliable component. When selecting semiconductor fuses, engineers prioritize factors such as voltage rating, current rating, interrupting capacity, and response time. The LA15QS4000-128 meets these critical requirements for its intended application class. Its robust construction and adherence to stringent manufacturing standards ensure consistent performance even under challenging operating conditions. Professionals in fields such as power electronics, renewable energy systems, industrial control, and consumer electronics rely on Littelfuse products for their critical protection needs. The LA15QS4000-128 is a testament to Littelfuse's dedication to providing advanced circuit protection solutions that meet the evolving demands of the global electronics industry.
  • Designed for 150VAC/DC semiconductor protection.
  • Compact form factor ideal for space-constrained applications.
  • Protects diodes and other sensitive semiconductor devices.
  • Ensures reliable operation and prevents component damage.
  • Manufactured by Littelfuse, a trusted leader in circuit protection.

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
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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.