Littelfuse H345621A - ACS SHOCK-SAFE FUSEHLDR 21A. 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

H345621A

Alternate Item Number: 03450621H

UPC: 079458111750

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Minimum Qty: 100

Multiplier: 100

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Overview

The Littelfuse H345621A ACS Shock-Safe Fuse Holder is a critical component for ensuring electrical safety and operational reliability in demanding industrial environments. Engineered to stringent international standards, including IEC 60065 and IEC 60127, this fuse holder is specifically designed to eliminate the risk of electrical shock, providing a robust safety barrier for personnel and equipment. Its panel-mount design facilitates seamless integration into control panels, power distribution units, and various other electrical enclosures, making it a versatile solution for a wide array of applications. One of the standout features of the H345621A is its innovative anti-tease mechanism. This intelligent design prevents accidental circuit interruption that can occur if the fuse holder knob is inadvertently depressed during operation or maintenance. This feature significantly enhances system uptime and reduces the likelihood of costly service calls caused by unintended fuse blowing. The commitment to safety and operational continuity makes this fuse holder an indispensable choice for engineers and technicians prioritizing dependable performance. Littelfuse understands that industrial applications require flexibility. Therefore, the ACS Shock-Safe Fuse Holder series offers a comprehensive range of options to meet diverse needs. With five distinct fuse holder types available, users can select the configuration that best suits their specific circuit protection requirements, allowing for optimized inventory management and reduced complexity. Furthermore, two user-friendly knob styles are offered: a screwdriver slot for precise actuation and a finger-grip knob for quick and easy fuse access. For applications exposed to moisture or dust, a drip-proof option is available on the screwdriver slot knob style, providing enhanced protection and longevity in challenging conditions. Terminal selection is another area where the H345621A excels in versatility. Two distinct terminal choices are provided, allowing for compatibility with a broad spectrum of wiring methods and connection types, ensuring a secure and reliable electrical connection regardless of the installation environment. This adaptability minimizes the need for specialized adapters or custom solutions, streamlining the installation process and reducing overall project costs. Key features and benefits of the Littelfuse H345621A ACS Shock-Safe Fuse Holder include: * **Superior Shock Protection:** Compliant with IEC 60065 and IEC 60127 standards, safeguarding against electrical shock. * **Anti-Tease Functionality:** Prevents accidental circuit interruption, ensuring continuous operation. * **Panel-Mount Design:** Offers easy integration into industrial control panels and enclosures. * **High Current Rating:** Rated for 21 Amperes, suitable for a wide range of power circuits. * **Versatile Configuration Options:** Five fuse holder types, two knob styles (screwdriver slot and finger-grip), and a drip-proof option for enhanced durability. * **Flexible Terminal Choices:** Two terminal options to accommodate various wiring requirements. * **Inventory Reduction:** The wide variety of options allows for consolidation of parts. This fuse holder is an ideal solution for applications such as industrial control systems, power supplies, motor drives, HVAC equipment, medical devices, and any other application where safety and reliability are paramount. Littelfuse's reputation for quality and innovation in circuit protection ensures that the H345621A will perform consistently under pressure, providing peace of mind and protecting valuable assets. Its robust construction and adherence to international safety standards make it a trusted choice for professionals worldwide.
  • IEC 60065 and 60127 compliant for superior electrical shock protection.
  • Anti-tease feature prevents accidental circuit interruption.
  • Panel-mount design for easy integration into industrial enclosures.
  • Available in five fuse holder types and two knob styles (screwdriver slot, finger-grip).
  • 21A current rating with drip-proof option available on screwdriver slot knob.

Specifications

Brand Name
Littelfuse
Current Rating
21 A
Material
Polyphenylene sulfide
Mounting Type
Panel-Mount
Series
ACS Shock-Safe Fuse Holder
Special Features
See in the web sheet
Standard
UL Listed CSA
Sub Brand
Shock-Safe
Type
Panel Fuseholder
Package Dimensions (L x W x H)
1.25 IN x 0.25 IN x 0.25 IN
Package Dimensions (L x W x H)
3.175 cm x 6.35 mm x 6.35 mm
Package Weight (Imperial)
0.150 L
Package Weight (Metric)
0.068 kg
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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.