Littelfuse LMF002U - Perfect for use in lighting systems, this 300 VAC time delay fuse is designed to handle ballast transformer in-rush currents.
Littelfuse

LMF002U

Alternate Item Number: 0LMF002.U

UPC: 079458077575

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Minimum Qty: 500

Multiplier: 500

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Overview

The **Littelfuse LMF002U** is a high-performance **300 VAC time delay fuse** engineered to safeguard lighting systems against damaging in-rush currents generated by ballast transformers. Designed for commercial and industrial applications, this fuse combines reliability, precision, and durability to ensure uninterrupted operation of critical lighting infrastructure. Whether deployed in office buildings, retail spaces, warehouses, or manufacturing facilities, the LMF002U delivers consistent protection while minimizing nuisance tripping—a common challenge in high-inrush environments. **Key Features and Benefits:** - **Time Delay Technology:** The LMF002U’s time delay characteristic allows it to withstand brief but high-magnitude in-rush currents typical of ballast transformers, preventing unnecessary fuse interruption during startup. This feature is critical in applications where transient overcurrents are frequent, such as fluorescent or HID lighting systems. - **300 VAC Rating:** Rated for **300 volts AC**, this fuse is ideal for use in 277V and 480V lighting circuits, making it versatile for both standard and high-voltage commercial installations. Its robust voltage rating ensures compatibility with a wide range of lighting transformers and power distribution systems. - **Compact and Reliable Design:** The LMF002U is built to meet stringent industrial standards, offering a compact footprint that simplifies installation in tight electrical panels or distribution boards. Its durable construction resists vibration, thermal stress, and electrical fatigue, ensuring long-term performance even in harsh operating conditions. - **Industry-Leading Protection:** As part of Littelfuse’s extensive portfolio of circuit protection solutions, the LMF002U benefits from decades of expertise in fuse technology. Littelfuse is a globally recognized leader in overcurrent and overvoltage protection, trusted by engineers and facility managers to deliver solutions that enhance system safety and reliability. **Typical Applications:** The LMF002U is purpose-built for **lighting systems** where ballast transformers are present, including: - **Commercial Lighting:** Offices, retail stores, and hospitality venues relying on fluorescent, LED, or HID lighting. - **Industrial Facilities:** Warehouses, manufacturing plants, and distribution centers with high-bay or task lighting. - **Outdoor Lighting:** Parking lots, streetlights, and area lighting where transformers are exposed to environmental stressors. - **Emergency Lighting:** Backup and exit lighting systems requiring reliable, long-life fuse protection. **Selection and Installation Considerations:** When choosing a time delay fuse for ballast transformer applications, professionals prioritize **in-rush current handling**, **voltage rating**, and **interrupting capacity**. The LMF002U excels in all three areas: - **In-Rush Current Handling:** Its time delay curve is optimized for the high initial currents of magnetic ballasts, reducing the risk of premature failure. - **Voltage Compatibility:** The 300 VAC rating ensures safe operation in both 120V/208V and 277V/480V systems, accommodating diverse lighting configurations. - **Easy Integration:** Designed for standard fuse holders, the LMF002U can be retrofitted into existing systems or specified for new installations with minimal rework. **Why Choose Littelfuse?** Littelfuse has been at the forefront of circuit protection for over a century, earning a reputation for innovation, quality, and reliability. The LMF002U exemplifies this legacy, offering engineers and facility managers a trusted solution for protecting sensitive lighting systems from transient overcurrents. With global distribution, comprehensive technical support, and a commitment to safety, Littelfuse ensures that professionals can deploy the LMF002U with confidence in any application. For lighting systems where downtime is costly and reliability is non-negotiable, the **Littelfuse LMF002U** is the optimal choice for ballast transformer protection.
  • 300 VAC rating for compatibility with 277V and 480V lighting circuits
  • Time delay feature prevents nuisance tripping during ballast transformer startup
  • Compact, durable design for harsh industrial environments
  • Trusted Littelfuse quality with global distribution and support
  • Ideal for fluorescent, HID, LED, and emergency lighting systems

Specifications

Application
fluorescent Lighting
Brand Name
Littelfuse
Series
LMF Series
Special Features
Fast-Acting
Standard
Standard 248-14 UL Listed/CSA
Sub Brand
POWR-GARD LMF Series
Type
InLine Fuse
Voltage Rating
300 VAC
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 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
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.