Littelfuse FLU.440M - The Littelfuse FLU series is designed specifically for the protection of multimeters. The 1000 VAC/VDC rating also makes the FLU ideal for a variety of other applications.
Littelfuse

FLU.440M

Alternate Item Number: 0FLU.440M

UPC: 079458108170

Documents & Media
BrochureTechnical BulletinTechnical DrawingSpecification Sheet

Contact for Pricing

Minimum Qty: 1000

Multiplier: 1000

*Contact for lower quantities*

Overview

The Littelfuse FLU.440M Midget fuse is a precision-engineered circuit protection solution designed for multimeters and high-voltage applications. Rated at 0.44 Amperes and 1000 VAC/VDC, this fuse provides reliable overcurrent protection for sensitive electronic instruments in demanding industrial environments. As part of Littelfuse’s trusted FLU series, the FLU.440M combines a compact Midget design with high-performance specifications to safeguard delicate circuitry from overloads, short circuits, and voltage surges. Engineered for professionals who demand accuracy and durability, the FLU.440M is ideal for protecting multimeters, test equipment, and other high-voltage instruments where space constraints and reliability are critical. Its Midget form factor ensures seamless integration into compact enclosures, making it a preferred choice for engineers and technicians in industries such as electronics manufacturing, power distribution, automotive testing, and telecommunications. Whether used in laboratory settings, field service applications, or industrial maintenance, this fuse delivers consistent performance and peace of mind. Key features of the Littelfuse FLU.440M include: - **Precision Current Rating**: Rated at 0.44 Amperes, the FLU.440M is specifically calibrated to protect sensitive multimeter circuits from overcurrent events, ensuring accurate measurements and equipment longevity. - **High Voltage Rating**: With a 1000 VAC/VDC rating, this fuse is versatile enough to handle a wide range of high-voltage applications, including power supplies, inverters, and test equipment. - **Compact Midget Design**: The Midget form factor allows for easy installation in tight spaces, making it suitable for applications where board real estate is limited. - **Fast-Acting Response**: Designed to interrupt fault currents quickly, the FLU.440M minimizes the risk of damage to connected equipment, reducing downtime and repair costs. - **Industry-Recognized Reliability**: Littelfuse is a global leader in circuit protection, with decades of expertise in developing fuses that meet the stringent demands of industrial and commercial applications. The FLU.440M is no exception.
  • 0.44A current rating for sensitive multimeter protection
  • 1000 VAC/VDC voltage rating for high-voltage applications
  • Compact Midget design for space-constrained installations
  • Fast-acting response to minimize equipment damage
  • Part of Littelfuse’s trusted FLU series for industrial reliability

Specifications

Amperage Rating
0.44 A
Application
protection of multimeters.
Brand Name
Littelfuse
Series
FLU
Special Features
Fast-Acting
Standard
CSA
Sub Brand
FLU Series
Type
Midget Fuses
Voltage Rating
1000 VAC/VDC

Similar Products

FLU.44

Current Rating: 0.44 A

Size: Midget

Series: FLU.440

FLA.400

Amperage Rating: .400 Amp

Application: mechanical indication

Interrupt Rating: 10kA

FLM.400

Application: small motors/high inrush

Interrupt Rating: 10kA

Special Features: RoHS

FLQ.400

Application: control transformers

Special Features: Time-Delay

Standard: Supplemental Protection

FLQ.400HXR

Application: control transformers

Special Features: Time-Delay

Standard: Supplemental Protection

FLA.100

Application: mechanical indication

Interrupt Rating: 10kA

Special Features: Pin Indicating Fuse

You May Also Be Interested In

The Littelfuse FLU series is designed specifically for the protection of multimeters. The 1000 VAC/VDC rating also makes the FLU ideal for a variety of other applications.

FLU011M

FLU.440 is a Midget fuse with an ampere rating of 0.44 and is specifically designed for the protection of multimeters.

FLU.44

FLU011 is a Midget fuse with an ampere rating of 11 and is specifically designed for the protection of multimeters.

FLU011

FAST-ACTING 1000V MIDGET FUSE FOR MULTIMETER PROTECTION - BULK 500-PACK

FLU011U

FLM.400 is a Midget fuse with an ampere rating of 0.4.

FLM.400

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.