Littelfuse LMF007U - Perfect for use in lighting systems, this 300 VAC time delay fuse is designed to handle ballast transformer in-rush currents.
Littelfuse

LMF007U

Alternate Item Number: 0LMF007.U

UPC: 079458946505

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Minimum Qty: 500

Multiplier: 500

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Overview

The **Littelfuse LMF007U** is a **300 VAC time delay fuse** engineered to provide reliable protection for lighting systems, particularly in applications involving ballast transformers. Designed to handle transient in-rush currents—common during startup in fluorescent, HID, and LED lighting systems—this fuse ensures consistent performance while safeguarding sensitive components from damage. As a trusted solution from **Littelfuse**, a global leader in circuit protection with decades of expertise, the LMF007U delivers the durability and precision required in industrial, commercial, and residential lighting installations. **Key Features and Benefits:** - **Time Delay Technology:** The LMF007U incorporates a time delay mechanism that allows brief in-rush currents to pass without nuisance tripping, ensuring uninterrupted operation during startup. - **High Voltage Rating (300 VAC):** Suitable for high-voltage lighting systems, including those with inductive ballasts, transformers, and motor-driven fixtures. - **Robust Construction:** Built to withstand harsh electrical environments, the fuse’s durable design resists vibration, thermal stress, and electrical surges, extending service life. - **Wide Application Range:** Ideal for use in **fluorescent lighting**, **high-intensity discharge (HID) lamps**, **LED drivers with transformers**, and other inductive loads where transient currents are prevalent. - **Industry-Recognized Reliability:** Littelfuse’s reputation for high-quality circuit protection solutions ensures that the LMF007U meets stringent safety and performance standards, reducing downtime and maintenance costs. **Typical Applications:** The LMF007U is widely used in **commercial lighting systems**, such as office buildings, retail spaces, and parking garages, where ballast transformers are standard. It is also essential in **industrial facilities**, including warehouses and manufacturing plants, where high-bay lighting and large-scale illumination systems require dependable protection. Additionally, the fuse is suitable for **outdoor lighting applications**, such as streetlights and stadium lighting, where environmental factors and electrical transients pose challenges. **Selection and Installation Considerations:** When selecting a time delay fuse for lighting systems, professionals prioritize **voltage rating, current rating, and time delay characteristics** to match the application’s demands. The LMF007U’s **300 VAC rating** makes it compatible with most lighting circuits, while its time delay profile ensures compatibility with inductive loads. Installation is straightforward, typically requiring a fuse holder or panel mount, and professionals should follow **NEC (National Electrical Code) guidelines** for proper sizing and placement. **Why Choose Littelfuse?** Littelfuse has been a pioneer in circuit protection for over a century, offering solutions that meet the evolving needs of electrical systems. The LMF007U exemplifies the company’s commitment to innovation, reliability, and safety, making it a preferred choice for engineers, electricians, and facility managers. By integrating Littelfuse products like the LMF007U into lighting systems, professionals can achieve **enhanced protection, reduced maintenance, and improved system longevity**—critical factors in any electrical installation.
  • 300 VAC rating for high-voltage lighting systems
  • Time delay design handles in-rush currents without nuisance tripping
  • Ideal for fluorescent, HID, and LED lighting with ballast transformers
  • Robust construction resists vibration, thermal stress, and surges
  • Trusted Littelfuse quality for industrial, commercial, and residential applications

Specifications

Application
fluorescent Lighting
Brand Name
Littelfuse
Current Rating
7 A
Series
LMF
Special Features
Fast-Acting
Standard
Standard 248-14 UL Listed/CSA
Sub Brand
POWR-GARD LMF Series
Type
InLine Fuse
Voltage Rating
300 VAC
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9F61 Size B Clips 1.6in

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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.