Littelfuse LMF003H - Perfect for use in lighting systems, this 300 VAC time delay fuse is designed to handle ballast transformer in-rush currents.
Littelfuse

LMF003H

Alternate Item Number: 0LMF003.H

UPC: 079458946444


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Minimum Qty: 100

Multiplier: 100

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Overview

The Littelfuse LMF003H is a high-performance 300VAC time delay fuse, meticulously engineered to provide robust circuit protection for demanding lighting system applications. This fuse is specifically designed to address the unique challenges presented by ballast transformer in-rush currents, a common issue that can lead to nuisance tripping in standard fuses. By incorporating precise time delay characteristics, the LMF003H effectively differentiates between transient in-rush events and genuine overcurrent faults, ensuring uninterrupted operation of your lighting infrastructure while maintaining critical safety standards. This industrial-grade fuse is an indispensable component for any professional involved in the design, installation, or maintenance of commercial and industrial lighting systems. Its 300VAC rating makes it suitable for a wide array of lighting circuits, including those found in office buildings, retail spaces, manufacturing facilities, warehouses, and outdoor illumination projects. The ability to withstand significant in-rush currents without premature activation is paramount for systems utilizing magnetic or electronic ballasts, which inherently draw a higher current upon startup. The LMF003H ensures that these startup surges are accommodated without compromising the fuse's integrity or the safety of the connected equipment. Littelfuse, a globally recognized leader in circuit protection solutions, brings its extensive expertise and commitment to quality to the LMF003H. When selecting fuses for critical applications, reliability and durability are non-negotiable. The LMF003H embodies these principles, offering dependable performance even in challenging environmental conditions. Its construction adheres to stringent industry standards, providing assurance of consistent protection against overloads and short circuits, thereby safeguarding valuable lighting fixtures, control gear, and associated electrical infrastructure from damage and potential fire hazards. Key benefits and features of the Littelfuse LMF003H include: * **Optimized for Lighting Systems:** Specifically designed to handle the unique current demands of ballast transformers. * **Time Delay Functionality:** Prevents nuisance tripping from in-rush currents while still protecting against sustained overcurrents. * **300VAC Voltage Rating:** Suitable for a broad spectrum of lighting circuits. * **Reliable Overcurrent Protection:** Safeguards electrical components from damage due to overloads and short circuits. * **Durable Construction:** Built to withstand demanding industrial and commercial environments. * **Trusted Manufacturer:** From Littelfuse, a pioneer and leader in circuit protection technology. Implementing the LMF003H fuse in your lighting system design is a proactive step towards ensuring operational continuity and extending the lifespan of your electrical assets. Its role in preventing equipment failure and maintaining safety compliance makes it a cost-effective and essential component for any serious electrical installation. Professionals rely on Littelfuse for fuses that deliver consistent performance and peace of mind, and the LMF003H is a prime example of this unwavering dedication to quality and innovation in circuit protection.
  • 300VAC time delay fuse
  • Designed for lighting systems
  • Handles ballast transformer in-rush currents
  • Prevents nuisance tripping
  • Reliable overcurrent protection

Specifications

Application
fluorescent Lighting
Brand Name
Littelfuse
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
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.