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Littelfuse 345621A - PANEL MOUNT SHOCK-SAFE FUSEHOLDER 621 A. Designed to eliminate electrical shock as defined by IEC standards 60065 and 60127, these panel-mount fuses holders offer a wide variety of options. This allows for inventory reduction and versatility. Anti-tease feature eliminates circuit interruption when knob is accidentally depressed Five fuse holder types for maximum flexibility. Two knob styles— screwdriver slot and fingergrip. Drip proof option available on screwdriver slot knob style. Two terminal choices depending on application.

Littelfuse 345621A PANEL MOUNT SHOCK-SAFE FUSEHOLDER 621 A. Designed to eliminate electrical shock as…

Alternate Item Number: 03450621X

UPC: 079458107319

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Contact for Pricing

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

Overview

The Littelfuse 345621A is a panel-mount shock-safe fuseholder designed to provide enhanced electrical safety, compliant with IEC standards 60065 and 60127. This model features a robust 621A current rating and utilizes screw terminal connections for secure and reliable wiring, particularly in environments prone to vibration. Its primary design objective is to eliminate electrical shock hazards, making it suitable for critical industrial and commercial applications. A key feature is the anti-tease mechanism, which prevents accidental circuit interruption when the fuseholder knob is inadvertently depressed, thereby minimizing downtime. The 345621A offers significant versatility through its compatibility with five different fuse holder types and the availability of two distinct knob styles: a screwdriver slot for tool-assisted operation and a fingergrip for manual access. Furthermore, a drip-proof option is available for the screwdriver slot knob style, providing added protection against moisture ingress in challenging operational settings. Designed for straightforward panel mounting, this fuseholder contributes to inventory reduction by offering a flexible solution that can adapt to various application requirements. The Littelfuse 345621A is an ideal choice for integration into industrial control panels, power distribution units, telecommunications equipment, and automotive charging systems where adherence to stringent safety standards and dependable circuit protection are paramount. Its construction and dual terminal choices ensure adaptability to diverse wiring configurations, promoting operational efficiency and potentially reducing maintenance overhead. The series designation is 621A, and it is manufactured in the USA.
  • IEC 60065 and 60127 compliant for shock safety
  • 621A current rating for high-power applications
  • Panel mount design for secure installation
  • Screw terminal connections for reliable wiring
  • Anti-tease feature prevents accidental circuit interruption

Specifications

Application
Circuit Board
Brand Name
Littelfuse
Connection Type
Screw Terminal
Mounting Type
Panel-Mount
Series
621A
Special Features
Drip proof option available on screwdriver slot knob style
Standard
RoHS
Sub Brand
345 Series
Type
Fuseholder
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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 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 do medium voltage fuses protect?

Medium voltage fuses protect transformers, potential transformers, feeders, and motor circuits.

What are the voltage and current ratings 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 and holders?

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

What conditions do Littelfuse feeder protection relays protect circuits from?

Feeder protection relays protect circuits from overcurrent, ground faults, phase loss, overload, and other detrimental conditions.

What is the Industrial Shock-Block® GFCI designed for?

The Industrial Shock-Block® GFCI is designed for people protection in industrial facilities and meets UL Standard 943C Class C and Class D.

How do resistance grounding systems benefit industrial applications?

Resistance grounding limits point-of-fault damage and eliminates arc-flash hazards and transit overvoltages associated with ground faults.

What kind of protection do Littelfuse voltage monitors provide?

Voltage monitors provide protection against both supply line and load side faults when the motor is running.

What functions can Littelfuse timers and flashers control?

Timers and flashers can control the delay of starting and stopping loads, cycling, and sequencing of motors, pumps, compressors, heaters, and lighting.

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.