Littelfuse LA130URD70TTI0250 - VERY FAST-ACTI SEMICOND FUSE 70TTI0250. Littelfuse North American style square body high-speed fuses provide maximum flexibility in equipment design and ultimate protection for today’s power conversion equipment. Available in different body sizes and multiple mounting styles, the broad range of ampere ratings allows great flexibility in equipment design. Engineered to provide state-of-the-art protection for SCRs, diodes, thyristors, GTOs, and IGBT devices, Littelfuse square body fuses have pure die-cut elements embedded in solidified sand to control arcing and lower I2t. All fuses are also equipped with a blown fuse trip indicator. Features: Choice of mounting styles provides a wide choice for equipment design. Broad range of ampere ratings in a given body size for design flexibility. Very low I2t minimizes damage to protected components. Superior cycling ability for long, reliable life on high cyclic loading. Extremely fast-acting and current-limiting for improved protection to equipment. Applications: Protection of rectifiers, inverters, DC drives, UPS systems, reduced voltage motor starters, and other equipment in globally accepted applications.
Littelfuse

LA130URD70TTI0250

UPC: 079458154818

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Overview

The **Littelfuse LA130URD70TTI0250** is a **very fast-acting semiconductor fuse** engineered to deliver **superior protection** for modern power conversion equipment. Designed with a **square body (North American style)** and **multiple mounting styles**, this fuse provides unmatched flexibility in equipment design while ensuring **state-of-the-art protection** for critical semiconductor devices. With a **250A current rating**, it is optimized for high-performance applications where **current limiting, fast response, and low I²t** are essential to prevent catastrophic failures in sensitive components like **SCRs, diodes, thyristors, GTOs, and IGBTs**. This fuse is part of Littelfuse’s **70TTI series**, a trusted line of high-speed fuses renowned for their **superior cycling ability, controlled arcing, and embedded pure die-cut elements** in solidified silica sand for enhanced reliability. **Key Features & Benefits:** - **Extremely Fast-Acting & Current-Limiting:** Minimizes damage to protected components by rapidly interrupting fault currents before they escalate. Ideal for applications where **fast response times** are critical to prevent thermal runaway or device failure. - **Pure Die-Cut Elements in Solidified Sand:** Ensures **controlled arcing** and **lower I²t**, reducing stress on downstream components and extending equipment lifespan. This design is a hallmark of Littelfuse’s high-speed fuse technology. - **Multiple Mounting Styles:** Offers **design flexibility** with options for **panel mounting, DIN rail mounting, or direct bolt-on configurations**, simplifying integration into diverse power systems. - **Blown Fuse Trip Indicator:** Provides **visual confirmation** of fuse status, enabling quick diagnostics and reducing downtime in critical operations. - **Superior Cycling Ability:** Engineered for **high cyclic loading**, making it suitable for applications with frequent start-stop cycles or pulsed power demands. **Industry Applications:** The **Littelfuse LA130URD70TTI0250** is a **versatile solution** for a wide range of power conversion and protection applications, including: - **Rectifiers & Inverters:** Protects semiconductor devices in **AC/DC conversion systems**, ensuring stable operation under varying load conditions. - **DC Drives & UPS Systems:** Safeguards **motor controllers, variable frequency drives (VFDs), and uninterruptible power supplies** from overcurrent events. - **Reduced Voltage Motor Starters:** Enhances safety in **industrial motor control panels** by limiting fault currents during startup and overload conditions. - **Industrial Power Electronics:** Suitable for **thyristor-based systems, GTO applications, and IGBT modules** in renewable energy, traction systems, and heavy machinery. **Why Choose Littelfuse?** Littelfuse is a **global leader in circuit protection**, with over a century of expertise in designing **high-performance fuses** for industrial, commercial, and renewable energy applications. The **70TTI series** is a testament to their commitment to **innovation, reliability, and safety**, offering engineers and system designers a **trusted solution** for protecting critical power electronics. With **strict quality control, extensive testing, and compliance with international standards**, Littelfuse fuses are the **preferred choice** for professionals who demand **uncompromising performance** in high-stakes environments. **Installation & Selection Considerations:** When selecting a fuse for semiconductor protection, professionals prioritize **fast response, low I²t, and high interrupting ratings**. The **LA130URD70TTI0250** excels in all these areas, making it ideal for **high-speed switching applications**. For optimal performance: - Ensure the fuse is **properly sized** for the application’s current rating and fault conditions. - Verify **mounting compatibility** with your system’s configuration (e.g., panel, DIN rail, or bolt-on). - Use **Littelfuse’s sizing guides** or consult their technical support for applicationspecific recommendations. **Conclusion:** For engineers and system integrators seeking a **high-speed, current-limiting fuse** with **superior protection and design flexibility**, the **Littelfuse LA130URD70TTI0250** delivers **unmatched reliability and performance**. Whether protecting **inverters in solar farms, drives in industrial automation, or UPS systems in data centers**, this fuse ensures **long-term equipment safety, reduced maintenance costs, and peace of mind** in critical power systems.
  • 250A current rating for high-performance power conversion
  • Very fast-acting & current-limiting for superior semiconductor protection
  • Pure die-cut elements in solidified sand for controlled arcing & low I²t
  • Multiple mounting styles for design flexibility
  • Blown fuse trip indicator for easy diagnostics

Specifications

Application
Protection of Semiconductors
Brand Name
Littelfuse
Current Rating
250 A
Material
Pure die-cut elements embedded in solidified sand
Mounting Type
Multiple mounting styles (panel, DIN rail, bolt-on)
Series
70TTI
Size
Square body (North American style)
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 Block 600VAC 600VDC Class CC 30A 3-Pole Screw with Reinforced Clip

30313R

Fuse Block 600VAC 600VDC Class CC 30A 3-Pole Screw with Reinforced Clip
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 Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.