Littelfuse LA15QS3500-128 - 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

LA15QS3500-128

Alternate Item Number: LA15QS3500128

UPC: 079458156355


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Overview

The **Littelfuse LA15QS3500-128** is a high-performance semiconductor fuse engineered to deliver precise protection for diodes and sensitive semiconductor devices operating at **150VAC/DC**. Designed for industrial and electronic systems where space is at a premium, this compact fuse combines reliability, efficiency, and compliance with stringent industry standards. Whether deployed in power conversion systems, motor drives, or renewable energy inverters, the LA15QS3500-128 ensures optimal performance while safeguarding critical components from overcurrent and fault conditions. Semiconductor fuses like the LA15QS series are essential in applications where traditional fuses may not provide the necessary precision or response time. Unlike standard fuses, semiconductor fuses are specifically designed to interrupt low-energy faults quickly, preventing catastrophic damage to sensitive electronics. The **LA15QS3500-128** excels in environments where space constraints and high reliability are non-negotiable, such as: - **Power Electronics**: Inverters, converters, and rectifiers in solar, wind, and battery storage systems. - **Industrial Automation**: Motor drives, PLCs, and control systems requiring fast-acting protection. - **Telecommunications**: Power supply units and rectifiers in data centers and network infrastructure. - **Medical Equipment**: Critical devices where uninterrupted operation and fault protection are paramount. - **Automotive and EV Charging**: High-efficiency systems requiring compact, high-performance protection. The **compact design** of the LA15QS3500-128 makes it ideal for integration into densely packed control panels, printed circuit boards (PCBs), and other space-constrained environments. Its **150VAC/DC rating** ensures compatibility with a wide range of semiconductor devices, including IGBTs, MOSFETs, and thyristors, while its **fast-acting response** minimizes downtime and reduces the risk of secondary damage. Littelfuse’s reputation for engineering robust, high-quality protection solutions is underscored by decades of innovation in the electrical and electronics industry. When selecting a semiconductor fuse, professionals prioritize **interrupting rating, response time, and physical dimensions**—all of which are optimized in the LA15QS3500-128. The fuse’s **high interrupting capacity** ensures it can safely handle fault currents without arcing or failure, while its **low let-through energy (I²t)** protects downstream components from thermal stress. Installation is straightforward, with options for both panel mounting and PCB integration, and Littelfuse provides comprehensive technical documentation to support engineers in selecting the right fuse for their application. Littelfuse, a global leader in circuit protection, has built its legacy on delivering solutions that meet the evolving demands of modern industries. The **LA15QS series** reflects this commitment, offering a balance of performance, durability, and compliance with international standards such as **UL, IEC, and CSA**. By choosing the LA15QS3500-128, engineers and procurement teams gain confidence in a product that not only meets but exceeds the rigorous requirements of today’s high-performance systems. For applications where reliability cannot be compromised, the Littelfuse LA15QS3500-128 stands as a trusted choice for semiconductor protection.
  • Designed for 150VAC/DC semiconductor protection
  • Compact form factor ideal for space-constrained applications
  • Fast-acting response to minimize fault damage
  • High interrupting capacity for reliable fault handling
  • Compatible with diodes, IGBTs, MOSFETs, and thyristors
  • UL, IEC, and CSA compliant for global standards
  • Easy installation with panel and PCB mounting options

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.