Littelfuse LMF004 - Perfect for use in lighting systems, this 300 VAC time delay fuse is designed to handle ballast transformer in-rush currents.
Littelfuse

LMF004

Alternate Item Number: 0LMF004.V

UPC: 079458009767


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BrochureTechnical BulletinSpecification Sheet

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Minimum Qty: 5

Multiplier: 5

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Overview

The Littelfuse LMF004 is a 300 VAC time delay fuse, specifically designed for integration into lighting systems. Its primary function is to reliably manage the significant in-rush currents generated by ballast transformers. This inherent characteristic of ballast transformers, particularly during startup, can cause nuisance tripping or premature failure in standard fuses. The LMF004's time-delay functionality ensures that it can withstand these transient current surges without interrupting normal operation, thereby protecting the ballast transformer and extending the lifespan of the lighting system. This fuse is an essential component for maintaining stable and continuous illumination in commercial and industrial settings where lighting reliability is paramount. The Littelfuse LMF004 offers dependable protection for your lighting infrastructure, ensuring consistent performance and reducing maintenance needs. Its 300 VAC rating makes it suitable for a broad range of lighting applications operating at this voltage level. Trust Littelfuse for critical electrical protection components.
  • 300 VAC voltage rating
  • Time delay fuse for in-rush current handling
  • Designed for lighting systems
  • Protects ballast transformers
  • Ensures reliable operation of lighting circuits

Specifications

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

What are the ratings for 10 x 38 mm fuses?

10 x 38 mm fuses are available in time-delay, fast-acting, board mount, or solar versions, with ratings from 125 to 1000 volts and 1/10 to 30 amperes.

What voltage are Littelfuse solar fuses rated for?

Littelfuse offers solar fuses and holders up to 1500 Vdc for both high-current and low-current photovoltaic applications.

What standard does the Industrial Shock-Block GFCI meet?

The Industrial Shock-Block GFCI is the first permanently connected special-purpose GFCI that meets UL Standard 943C Class C and Class D for people protection in industrial facilities.

How can I get technical support for Littelfuse products?

You can contact Littelfuse Techline experts at +1-800-TEC-FUSE (800-832-3873) or email [email protected] for product cross references, technical information, and application assistance.

What types of UL Class fuses does Littelfuse offer?

Littelfuse manufactures a complete selection of UL Class fuses for protecting electrical systems and personnel, featuring innovative indication for improved productivity and safety.

What are Littelfuse high-speed fuses used for?

Littelfuse high-speed fuses protect critical power semiconductor devices against short circuits in power conversion applications like inverters, variable-speed drives, UPS, and DC drive systems.

What do Littelfuse medium voltage fuses protect?

E-rated and R-rated medium voltage fuses from Littelfuse protect transformers, potential transformers, feeders, and motor circuits. They cover a wide range of current, voltage, and interrupting ratings.

What features do Littelfuse fuse blocks offer?

Littelfuse fuse blocks and holders feature compact designs, an indication feature, and the flexibility of DIN-rail mounting.

What is the purpose of POWR-BLOKS power distribution blocks?

POWR-BLOKS offer a safe, convenient way for splicing cables and managing power distribution requirements within panels and systems, with touch-safe blocks and available covers.

What are Littelfuse pre-engineered switch panels designed for?

These UL Listed, pre-built, customizable products are ideal for the Construction Market and are specifically designed to meet NEC® coordination requirements.

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.