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Littelfuse 344405A - INDICATING PANEL 344 R Knob 200-250V. Blown-Fuse Indicating Panel Mount Fuseholder for 3AG Fuses (Round Knob).

Littelfuse 344405A INDICATING PANEL 344 R Knob 200-250V. Blown-Fuse Indicating Panel Mount Fuseholder for…

Alternate Item Number: 03440405X

UPC: 079458107012


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BrochureTechnical BulletinSpecification Sheet

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Littelfuse 344405A is a panel mount fuseholder designed for 3AG (1.25" x 0.25") fuses, featuring a voltage rating of 200-250V. This indicating fuseholder incorporates a distinctive round knob that functions as both a secure fuse holder and a visual indicator for blown-fuse detection. The indicator mechanism provides high-contrast signaling, enabling quick identification of fuse status in industrial environments. The panel mount design accommodates standard 1/4" panel cutouts and is secured using a threaded bushing and nut for vibration-resistant installation. This fuseholder is optimized for use in control panels, power distribution units, motor controllers, and other applications where clear fault indication and reliable circuit protection are critical. Key Specifications: * **Manufacturer:** Littelfuse * **SKU:** 344405A * **Series:** 344 * **Fuse Type:** 3AG (1.25" x 0.25") * **Voltage Rating:** 200-250V AC/DC * **Mounting Type:** Panel Mount * **Indicator:** Round Knob Blown-Fuse Indicator Applications: This Littelfuse 344 series fuseholder is suitable for a variety of industrial applications including: * PLC and relay control systems * Industrial switchgear * Motor starters * Variable frequency drives (VFDs) * Laboratory test equipment * Renewable energy systems (solar inverters, wind turbine controllers) The 344405A offers straightforward installation, making it suitable for both new installations and retrofitting into existing systems. Its 200-250V rating supports use in AC and DC applications within this range, including control circuits and power supplies.
  • Panel mount fuseholder for 3AG fuses
  • 200-250V voltage rating
  • Round knob blown-fuse indicator for visual fault detection
  • Threaded bushing and nut for secure panel mounting
  • Suitable for control panels, power distribution, and industrial machinery

Specifications

Amperage Rating
15 Amperes
Brand Name
Littelfuse
Mounting Type
Panel Mount
Series
344
Size
1.25" x 0.25"
Special Features
Blown fuse indicator
Standard
UL Listed CSA
Sub Brand
344/348 Series
Type
Blown Fuse Indicating / Low Profile Holders for 3AG Fuses
Voltage Rating
200-250V
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Frequently Asked Questions

What types of fuses does Littelfuse offer for industrial applications?

Littelfuse offers UL Class fuses, high-speed fuses, medium voltage fuses, 10 x 38 mm fuses, and solar fuses for industrial applications.

What are Littelfuse high-speed fuses used for?

High-speed fuses protect critical power semiconductor devices against short circuits in power conversion applications like inverters and variable-speed drives.

What is the voltage and current range for 10 x 38 mm fuses?

10 x 38 mm fuses are available with ratings from 125 to 1000 volts and 1/10 to 30 amperes.

What is the maximum voltage for Littelfuse solar fuses?

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

What is the purpose of Littelfuse arc-flash protection relays?

Arc-flash relays detect developing arc-flash incidents and send a trip signal to interrupt power before significant damage occurs.

What types of protection do Littelfuse motor protection devices offer?

Motor protection includes voltage monitors, current monitors, and Bluetooth enhanced overload relays for low and medium voltage applications.

What do Littelfuse pump controllers protect?

Pump controllers protect and disable a pump if a hazardous condition arises, with options for single-phase and three-phase applications.

How can Techline assist with Littelfuse products?

Techline experts can answer questions about product cross references, general technical information, engineering drawings, and application assistance.

What is the Littelfuse MROplus™ program designed to do?

The MROplus™ program helps manufacturing facilities save money by reducing inventory and downtime while improving safety and productivity.

What information is available on the Littelfuse Business Center website?

The Littelfuse Business Center provides access to product availability, pricing, order placement, order status, and literature ordering.

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.