Littelfuse LFH25030-3C - 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

LFH25030-3C

Alternate Item Number: LFH250303C

UPC: 079458181326

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Overview

The **Littelfuse Class H Fuse Block (SKU: LFH25030-3C)** delivers robust and reliable circuit protection for industrial applications where operational continuity and safety are critical. Designed to meet the demands of modern industrial environments, this fuse block ensures compliance with Class H fuse standards while providing a secure and efficient solution for overcurrent protection. Engineered by Littelfuse, a global leader in circuit protection solutions, the LFH25030-3C is built to withstand harsh conditions, offering long-term durability and performance. Class H fuse blocks, such as the LFH25030-3C, are widely used in industrial settings where reliable fault protection is essential to prevent equipment damage, downtime, and safety hazards. Unlike Class R fuse blocks, which incorporate a rejection feature to prevent incorrect fuse insertion, the LFH25030-3C is optimized for Class H fuses, ensuring compatibility with a broad range of industrial applications. The dimensional compatibility between Class H and Class R fuse blocks allows for seamless integration into existing systems, making the LFH25030-3C a versatile choice for retrofits and new installations alike. **Key Features and Benefits:** - **High Reliability:** Designed for continuous operation in industrial environments, the LFH25030-3C provides consistent and dependable circuit protection, reducing the risk of unexpected failures. - **Compatibility with Class H Fuses:** Engineered to work seamlessly with Class H fuses, this fuse block ensures optimal performance and adherence to industry standards for overcurrent protection. - **Dimensional Compatibility:** Shares the same dimensions as Class R fuse blocks, allowing for easy replacement or integration into existing systems without requiring modifications to mounting infrastructure. - **Enhanced Safety:** While Class R blocks include a rejection feature to prevent incorrect fuse installation, the LFH25030-3C is designed specifically for Class H fuses, ensuring proper fuse selection and reducing the risk of misapplication. - **Durable Construction:** Built to withstand the rigors of industrial environments, the LFH25030-3C is constructed from high-quality materials that resist corrosion, vibration, and thermal stress. **Typical Applications:** The Littelfuse LFH25030-3C Class H fuse block is ideal for a wide range of industrial applications, including: - **Manufacturing Facilities:** Protecting machinery and equipment in production lines to prevent costly downtime and equipment damage. - **Power Distribution Systems:** Safeguarding electrical panels and distribution boards in commercial and industrial buildings. - **Renewable Energy Systems:** Providing reliable overcurrent protection in solar and wind power installations. - **HVAC Systems:** Ensuring safe and efficient operation of heating, ventilation, and air conditioning systems in large facilities. - **Motor Control Centers:** Protecting motors and associated control circuits in industrial motor applications. **Installation and Selection Considerations:** When selecting a fuse block for industrial applications, professionals must consider factors such as the type of fuses required, environmental conditions, and system compatibility. The LFH25030-3C is designed to simplify installation and maintenance, with a robust design that minimizes the risk of misalignment or improper installation. Its compatibility with Class H fuses makes it a reliable choice for applications where precise overcurrent protection is critical. Littelfuse, a trusted name in circuit protection, has been delivering innovative solutions for over a century. With a reputation for quality, reliability, and technical expertise, Littelfuse products are used in a wide range of industries, from automotive and aerospace to industrial and renewable energy. The LFH25030-3C Class H fuse block is a testament to Littelfuse's commitment to providing high-performance solutions that meet the evolving needs of industrial professionals. For engineers, electricians, and facility managers seeking a dependable and high-quality fuse block, the Littelfuse LFH25030-3C offers the performance, durability, and safety required to protect critical industrial systems. Whether upgrading existing infrastructure or designing new installations, this fuse block provides the reliability and peace of mind needed to ensure uninterrupted operation and compliance with industry standards.
  • Reliable Class H fuse block for industrial circuit protection
  • Compatible with Class H fuses for optimal performance
  • Dimensional compatibility with Class R fuse blocks for easy integration
  • Durable construction for harsh industrial environments
  • Trusted Littelfuse quality for long-term reliability

Specifications

Brand Name
Littelfuse
Series
Class H
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.