Littelfuse LA120X2-1 - Littelfuse LA120X semiconductor protection fuses, rated ½ through 30A, 1200 VAC are popular for use in traction drive auxiliary circuits and similar applications. LA120X fuses are also suitable for use on 1000VDC auxiliary circuits with low time constants. Features: 1000 Volt DC rating for a wide range of circuits. Compact size fits in where competitive sizes will not fit. Applications: Protection of traction drive auxiliary circuits, etc.
Littelfuse

LA120X2-1

Alternate Item Number: LA120X21

UPC: 079458152012

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Overview

The Littelfuse LA120X2-1 semiconductor protection fuse (SKU: LA120X2-1) is engineered to deliver robust and reliable circuit protection in demanding industrial environments. As a critical component from Littelfuse, a globally recognized leader in circuit protection solutions, this fuse is specifically designed for high-performance applications where safety and operational integrity are paramount. With a versatile current rating ranging from ½ through 30 Amperes and a substantial 1200 VAC rating, the LA120X2-1 is exceptionally well-suited for protecting sensitive semiconductor devices in AC circuits. Its primary application lies within traction drive auxiliary circuits, a vital area in electric vehicles, industrial machinery, and renewable energy systems where precise and rapid fault interruption is essential to prevent catastrophic damage. The ability to safeguard these critical systems ensures continuous operation and minimizes costly downtime. Beyond its AC capabilities, the Littelfuse LA120X2-1 also boasts a significant 1000 Volt DC rating. This dual AC/DC capability makes it an incredibly adaptable solution for a broad spectrum of electrical systems. It is particularly advantageous for use on 1000VDC auxiliary circuits, including those characterized by low time constants. In such applications, the fuse's fast-acting characteristics are crucial for quickly isolating faults before they can propagate and cause extensive damage to equipment. A standout feature of the LA120X2-1 is its compact physical design. In many industrial settings, space is at a premium. This fuse's smaller footprint allows it to be integrated into control panels and equipment enclosures where larger, less compact fuses simply would not fit. This design consideration enhances installation flexibility and enables engineers to optimize space utilization without compromising on protection levels. The compact size ensures that even in densely populated electrical assemblies, effective semiconductor protection can be achieved. Key features and benefits of the Littelfuse LA120X2-1 include: * **Broad Application Spectrum:** Ideal for traction drive auxiliary circuits, general industrial auxiliary circuits, and other high-voltage DC applications. * **High Voltage Ratings:** 1200 VAC and 1000 VDC ratings provide extensive protection capabilities for diverse circuit designs. * **Compact Form Factor:** Its small size facilitates installation in space-constrained environments, offering greater design freedom. * **Semiconductor Protection:** Specifically designed to protect sensitive semiconductor devices from overcurrents and short circuits. * **Reliable Performance:** Manufactured by Littelfuse, a trusted name synonymous with quality and dependability in circuit protection. When selecting fuses for critical industrial applications, professionals rely on the proven performance and advanced technology offered by Littelfuse. The LA120X2-1 exemplifies this commitment to excellence, providing essential protection for the complex electrical systems that power modern industry. Its combination of high voltage ratings, versatile AC/DC capability, and compact design makes it a go-to choice for engineers and technicians seeking dependable semiconductor protection.
  • Littelfuse LA120X2-1 semiconductor protection fuse
  • Rated ½ through 30A, 1200 VAC for AC circuits
  • 1000 VDC rating for DC auxiliary circuits, including low time constants
  • Compact size for space-constrained applications
  • Designed for traction drive auxiliary circuits and similar industrial uses

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.