Littelfuse LA100P225-4 - Littelfuse's LA100P semiconductor protection fuses are rated 1000V, extending the range of protection for UPS systems, AC and DC drives, reduced voltage motor starters and similar applications where lower l2t and superior reliability are needed. With ratings from 15-1000 amperes, a wide range of high voltage applications can be served. Features: Low l2t minimizes damage to protected components on short circuit. Controlled arc voltage reduces stress to circuit components during fuse clearing. Applications: Protection of UPS systems, AC/DC drives, reduced voltage motor starters and other 1000V or less semiconductor devices.
Littelfuse

LA100P225-4

Alternate Item Number: LA100P2254

UPC: 079458151749

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Overview

Littelfuse’s LA100P225-4 semiconductor protection fuse delivers unmatched reliability and precision for high-voltage industrial applications. Designed to safeguard critical semiconductor devices in demanding environments, this 1000V-rated fuse ensures robust protection for UPS systems, AC/DC drives, and reduced voltage motor starters. With a versatile current rating range of 15-1000 amperes, the LA100P225-4 is engineered to meet the stringent demands of modern power electronics, where operational continuity and component integrity are non-negotiable. The LA100P series is built on Littelfuse’s legacy of innovation and quality, offering features that set it apart in the protection fuse market. A standout characteristic is its **low I²t (let-through energy)**, which minimizes thermal and mechanical stress on protected components during short-circuit events. This is particularly critical in semiconductor applications, where even minor overcurrent conditions can lead to catastrophic failure. By limiting the energy let-through, the LA100P225-4 reduces the risk of collateral damage, extending the lifespan of expensive downstream equipment and reducing costly downtime. Another key advantage of the LA100P225-4 is its **controlled arc voltage**, a feature that mitigates voltage spikes during fuse clearing. In high-voltage systems, uncontrolled arc voltage can induce transient overvoltages that stress insulation, degrade performance, or even trigger secondary faults. Littelfuse’s proprietary arc management technology ensures a stable, predictable clearing process, preserving the integrity of the entire circuit. This makes the fuse an ideal choice for applications where electromagnetic compatibility (EMC) and system reliability are paramount. The versatility of the LA100P225-4 extends across a broad spectrum of industries, including renewable energy, industrial automation, and heavy machinery. In **UPS systems**, for example, the fuse provides critical protection against short circuits and overloads, ensuring seamless power delivery to sensitive loads like data centers or medical equipment. For **AC/DC drives**, which are ubiquitous in variable-speed motor control applications, the LA100P225-4 safeguards power semiconductors (such as IGBTs and thyristors) from destructive fault currents, thereby enhancing system efficiency and longevity. Similarly, in **reduced voltage motor starters**, the fuse acts as a first line of defense, preventing damage to motor windings and associated control circuitry during startup or fault conditions. Selecting the right protection fuse involves balancing multiple factors, including voltage rating, current rating, interrupting capacity, and thermal performance. The LA100P225-4 excels in all these areas, offering a **1000V maximum voltage rating** and a **high interrupting rating** to handle severe fault conditions. Its compact design and standardized mounting options (such as DIN rail or panel mounting) simplify installation, while Littelfuse’s rigorous testing—including environmental stress screening and long-term reliability testing—ensures consistent performance in real-world conditions. Professionals in the field trust Littelfuse for its commitment to innovation, as evidenced by its extensive portfolio of protection solutions and global support network. Beyond its technical specifications, the LA100P225-4 reflects Littelfuse’s deep expertise in power protection. With over a century of experience, Littelfuse has pioneered solutions that address the evolving challenges of modern electrical systems, from semiconductor fuses to surge protective devices. The company’s dedication to research and development ensures that products like the LA100P225-4 remain at the forefront of industry standards, providing engineers and maintenance teams with the confidence to deploy them in mission-critical applications. Whether protecting a high-power inverter in a solar farm or a variable frequency drive in a manufacturing plant, the LA100P225-4 delivers the reliability and precision required to keep operations running smoothly.
  • 1000V rated for high-voltage semiconductor protection
  • Low I²t minimizes damage to protected components during short circuits
  • Controlled arc voltage reduces stress on circuit components during clearing
  • Versatile 15-1000A current rating for broad industrial applications
  • Trusted Littelfuse quality for UPS, drives, and motor starter protection

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Current Rating
15-1000 A
Mounting Type
DIN rail or panel mounting
Series
LA100P
Special Features
Very-Fast Acting
Standard
UL Recognized
Sub Brand
LA Series
Type
Semiconductor Fuse
Voltage Rating
1000 V
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.