Littelfuse LFH25100-3CID - The new Littelfuse Class H blocks offer many advantages over previous generations that are noted in the features and benefits section. Class H and Class R fuse blocks are dimensionally the same, but Class R blocks incorporate a rejection feature, which only allows Class R fuses to be inserted.
Littelfuse

LFH25100-3CID

Alternate Item Number: LFH251003CID

UPC: 079458181227

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Overview

The Littelfuse Class H Fuse Block LFH25100-3CID represents a significant advancement in industrial circuit protection, offering enhanced reliability and performance for critical applications. Engineered by Littelfuse, a globally recognized leader in circuit protection solutions, this fuse block is designed to seamlessly integrate with Class H fuses, providing robust and dependable overcurrent protection for a wide range of industrial equipment and systems. This LFH25100-3CID model is specifically designed for industrial environments where consistent and reliable power management is paramount. Its robust construction ensures durability and longevity, even under demanding operational conditions. The primary function of this fuse block is to house and protect Class H fuses, acting as a vital component in preventing damage to electrical circuits and equipment caused by overloads or short circuits. By safely interrupting the flow of current when fault conditions are detected, it safeguards valuable assets and minimizes downtime. A key advantage of Littelfuse's Class H fuse blocks, including the LFH25100-3CID, lies in their design evolution. While sharing identical dimensions with Class R fuse blocks, this distinction is crucial for system integrity. Class R fuse blocks incorporate a rejection feature, a safety mechanism that exclusively permits the insertion of Class R fuses. This prevents the inadvertent installation of lower-rated fuses, which could compromise protection levels. The LFH25100-3CID, being a Class H block, is optimized for Class H fuses, ensuring compatibility and adherence to specific protection standards required in many industrial settings. Typical applications for the Littelfuse Class H Fuse Block LFH25100-3CID span across various industrial sectors. These include motor control centers, power distribution panels, HVAC systems, manufacturing machinery, and any application where reliable protection of inductive loads and general power circuits is essential. Professionals in electrical engineering, maintenance, and system design rely on Littelfuse products for their proven track record of quality and safety. The selection of a fuse block like the LFH25100-3CID is often dictated by the specific current and voltage requirements of the protected circuit, as well as the type of fuse required for optimal protection against various fault scenarios. Key features and benefits of the Littelfuse Class H Fuse Block LFH25100-3CID include: * **Superior Circuit Protection:** Designed to house Class H fuses for reliable overcurrent protection. * **Industrial Durability:** Built with robust materials to withstand harsh industrial environments. * **Enhanced Safety:** Contributes to the overall safety and reliability of electrical systems. * **Dimensional Compatibility:** Shares dimensions with Class R blocks, facilitating integration where applicable (though rejection features differ). * **Littelfuse Quality:** Backed by the reputation of a leading manufacturer in circuit protection. When specifying fuse blocks, engineers consider factors such as voltage rating, current rating, number of poles, and the specific fuse class required. The LFH25100-3CID is a testament to Littelfuse's commitment to providing versatile and dependable solutions that meet the rigorous demands of modern industrial electrical infrastructure. Its straightforward installation and maintenance further contribute to its value proposition for end-users seeking efficient and effective circuit protection.
  • Reliable circuit protection with Class H fuses
  • Durable construction for demanding industrial environments
  • Designed for optimal safety and system integrity
  • Dimensionally compatible with Class R fuse blocks
  • Manufactured by Littelfuse, a trusted leader in circuit protection

Specifications

Brand Name
Littelfuse
Special Features
Universal mounting holes
Standard
UL Listed CSA Recognized
Sub Brand
LF Series Fuseblock
Type
Class H Fuseblock
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
BB18 is a three-phase busbar terminal power feed lug, which is intended for use with LPSM/LPSC series fuse holders. See datasheet for more detailed specifications.

BB18

BB18 is a three-phase busbar terminal power feed lug, which is intended for use with LPSM/LPSC series fuse holders. See datasheet for more detailed specifications.
D4/8.SFT2.I.ADO

1SNA399777R1200

D4/8.SFT2.I.ADO
2000W 5V 150A 24V 10A 2-12V 1P

SH20-P3T53J4

2000W 5V 150A 24V 10A 2-12V 1P

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.